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$Wetenschap - \Nijverheid- Handel$

170 broad and laminar, though scarcely expanded distally, terminal part poorly developed and never composed of more than 3 joints, the last very narrow; masticatory lobe short, truncate at the tip; epignath large, flanking the basal part. Legs, as a rule, slender, increasing in length posteriorly. Sexual appendage of male simple, conic, and generally connected with the inner rami of the 1st pair of pleopoda; the latter very largely developed, terminating each in a highly chiti- nized, conical joint obliquely grooved below, for conducting the evacuated sperm. Inner ramus of 2nd pair of pleopoda in male terminating in a slender lash finely pointed at the tip. Uropoda with the outer ramus more or less flattened, lanceolate, inner much smaller, sublinear, and, as a rule, attached far in front of the outer. Remarks. This family belongs to the 2nd section of the Oniscoida, and comprises by far the greater bulk of the tribe, for which reason it might perhaps be convenient to subdivide it into several families. The northern forms, however, belonging to this group exhibit in reality a very close relation to each other, the structure of the oral parts being especially very uniform in the different genera, whereas these appendages exhibit well-marked differences from those in the 2 preceding families. For instance, in the mandibles of all the forms with which I am acquainted, a true molar expansion, is wanting, and instead of it there is a peculiar recurved brush-like appendage somewhat resembling a strong seta. Moreover the inner masticatory lobe of the anterior maxillse in all the forms has but 2 hairy setse at the tip, and is very much narrower than the outer. Finally, the terminal part of the maxillipeds is very much reduced, and never consists of more than 3 joints. The conically produced last segment of the metasome affords an- other characteristic feature common to all the forms, and the structure of the uropoda is also characteristic from the insertion of the inner ramus far in front of the outer. Contrary to what is the case in the Trichoniscidce, the structure of the copulative appendages in the male exhibits a remarkable uniformity throughout this family. About 20 different genera have been referred to this family, 5 of which will be treated of below. den. 1. OnlSCUS, Linne, 1767. Generic Characters. Body broad and depressed, with the lateral parts of the segments lamellarly expanded. Cephalon with well defined lateral lobes, front imperfectly defined from the epistome. Metasome not abruptly contracted;
171 last segment considerably produced. Eyes large, sublateral. Antennulse with the terminal joint well developed. Antennae slender and elongated, with the flagellum composed of 3 articulations. Mandibles with numerous penicils behind the cutting part. Legs moderately slender, gradually increasing posteriorly. Opercular plates of uropoda without any air-cavities, those of the 2 anterior pairs deeply bilobed. Uropoda rather produced, with the inner ramus originating far in front of the outer. Remarks. This is the genus first established, and indeed formerly embraced all the Oniscoida. In the restriction now generally adopted, it comprises only a restricted number of species, chiefly characterised by the broad, depressed body and the 3-articulated flagellum of the antenna?. Only a single species belongs to the fauna of Norway, and will be described below. Oniscus asellus, Lin. (PI. LXXV.) Oniscus asellus, Linnaeus, Fauna suecica, IV. p. 183. Syn: Oniscus murarius, Cuvier. /bssor, Koch? Specific Characters. Body rather regularly oval, greatest width exceeding half the length, dorsal face but slightly convex, and, in adult specimens, nearly smooth, and glossy, in younger specimens of a duller appearance, being rough owing to small tubercles occurring especially on the anterior part of the body. Cephalon to a great extent flanked by the side-plates of the 1st segment of mesosome, and fully twice as broad as it is long, frontal edge obtusely angular in the middle, lateral lobes rather prominent, narrow linguiform, dorsal face clothed with small rounded tubercles. Side-plates of mesosome greatly prominent, lamellar, sub- contiguous, all terminating behind in an acute corner. Metasome about half the length of the mesosome and not much narrower, the 2 anterior segments very small and wholly embraced by the preceding segment, epimeral plates of the 3 succeeding segments narrowly produced and strongly recurved, the posterior pair extending almost as far as the last segment; the latter much longer than it is broad at the base, outer part narrow conic, convex above. Eyes oval and but slightly convex. Antennulae with the terminal joint about the length of the basal one, and conically tapered. Antennae long and slender exceeding half the length of the body, flagellum shorter than the last peduncular joint, and having the 1st and last articulations of about equal length, the middle one shorter. Legs rather slender, with the outer joints densely spinous inside. Uropoda with the outer
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AN ACCOUNT OF THE CRUSTACEA OF NORW
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BERGEN. JOHN GRIEG
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VI Copenhagen Museum, who have kind
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VIII H. J. Hansen. Oversigt af de p
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X C. Bovattius. Notes on the family
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thus meriting the name of true gnat
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Tribe 1. CHELIFERA. Body generally
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of legs. In the structure of the or
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8 fied with Apseudes talpa of Monta
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10 in female rather strong, hand ve
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12 flagellum. Inferior antennae a l
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14 Tanais, on separate lobes. Super
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16 Gen. 2. Paratanais, Dana, 1852.
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18 the genus Parataitais. Inferior
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20 robust than in T. tenuimanus, wi
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22 Remark*. - This form was first r
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24 free segment of mesosonie longer
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26 Occurrence. Only 2 female specim
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28 Distribution. -- Off Reykjavik,
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30 projection not denned from the b
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32 Imt slightly setous. Chelipeds s
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34 Cryptocope abbreviata, (PL XV, f
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Occurrence. I have met with this fo
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38 wholly absent, in male normally
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Apseudidee. G.O. S ars, autogr . I
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Ta na i d ae. 6.0. S ars, autogr. "
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Jar. aid se. G.O. S ars, autogr. I
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Ta n a i d ae. G. 0. S ars, autogr
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Ta naid as. G.O. S ars, autogr. I s
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Is Ta n a i d as . G.O. S ars, auto
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Ta n a i d as. G.O. S srs, autogr.
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40 1. Pseudotanais forcipatus (Lill
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42 form; carpal spine of the succee
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44 without distinct coxal plates. M
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46 first 2 segments of mesosome som
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long sensory 48 filaments. Mandible
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50 Fam. 2. Gnathiidae. r*. Body of
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52 Praniza might be the female of A
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54 2. Gnathia dentata, (PI. XXII. f
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56 Distribution. Greenland (Kroyer)
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58 Gen. 1. ^Ega, Leach, 1815. Gener
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60 2. &g& tridens, Leach. (Pi. XXV,
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62 the end of the propodos, inside
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64 7. ^Ega ventrosa, (PL XXVI, fig.
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66 spinules. Eyes very large, nearl
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68 Remarks. The above diagnosis ref
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70 hroad, coarsely spinous at the t
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72 Anterior pairs of legs nearly as
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74 mentary stars, arranged in trans
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76 Limnoria lignorum (Eathke). (PI.
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Tribe 3. VALVIFERA. Remarks. The ch
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80 E. Miers 1 ), the genus comprise
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Ta na i d SB. G.O. S ars, autogr. I
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Anthuridae. G.O. S ars, autogr . I
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Gnathiidae. G. 0. S BTS, autogr . I
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tgidae. G.O.Sars. autogr. I s opo d
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fegidae. G. 0. S ars, autogr . Is o
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G.O. S ars, autogr . I s opo da. PI
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Cirolanid I s opo da. PI. .,-.,..-
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Idotheidas. G.O. S ars, autogr . I
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82 flagellum much shorter than the
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84 he records as I. phosphor ca Har
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86 Occurrence. The species has a di
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88 Arc-torn* given by Latreille to
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90 2. Astaeilla arietina, G. 0. Sar
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92 Occurrence. It would seem to be
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Tribe k. ASELLOTA. Be-mark*. In the
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96 suture along the middle, and 2 l
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98 Fam. 2. laniridae. Characters. G
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U)0 peduncle. Kpignath of the maxil
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102 of 400 fathoms. Subsequently I
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104 length, without any distinctly
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106 Remarks. The type of this famil
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108 2. Munna limieola, G. 0. Sars.
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110 Inferior antenna?, as compared
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112 Paramunna bilobata, (PI. XLVII,
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114 hairs in their outer part, tip
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116 Gen. 4. DendrOtlOn, G. O. Sara,
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IdoiheidaB. G.O. S ars, autogr . I
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Arciuridaa. G.O. S srs, autogr I s
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Arcturidae. G.O. S ars, autogr I s
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Janiridse. G.O. S srs, autogr . I s
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laniridas. I s op o da.. PI. 42 G.
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Munnids. Is op o da.. PI. 44. G.O.S
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Munnidas- G.O. S ars, autogr I s op
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Munnidae. I s opo da- i. G. 0. S ar
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118 Fam. 4. Desmosomidae. Character
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120 ever, rather different, and ver
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122 middle, to a strong, recurved,
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124 short. Uropocla scarcely exceed
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126 form, with the proximal joints
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128 to he identical with a form pre
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130 the mandibles, in particular, i
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132 As our knowledge of this peculi
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134 with the carpal joint oblong fu
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136 1. Ilyarachna longicornis, (PI.
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m 138 3. Ilyarachna denticulata, G.
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140 antennae not quite twice as lon
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142 Occurrence. I first discovered
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144 Gen. 6. EliryCOpe, G. 0. Sars,
Page 251: Desmosomidae, I s op o da.. PI. 50.
Page 257: Desmosomidae 1 . G. 0. S ars, autog
Page 263: Munnopsidae. G.O. S ars, autogr , I
Page 267: Munnopsidas. 6. 0. S ars, autogr .
Page 271: IVlunnopsidae. G.O. S ars, autogr .
Page 275: Munnopsidae. G 0. S srs, autogr . I
Page 278 and 279: 146 taken it very plentifully on a
Page 280 and 281: 148 must also occur off the coasts
Page 282 and 283: 150 the carpal one. dactylus minute
Page 284 and 285: 152 orbicular in form, dactylus com
Page 286 and 287: 154 The mandibles are strong, and a
Page 288 and 289: or less elongated, basal part not p
Page 290 and 291: 158 Remarks. This genus, establishe
Page 292 and 293: 160 thin, without air-chambers or a
Page 294 and 295: 162 Occurrence. According to Mr. Bu
Page 296 and 297: of n little bowl of a spoon; that o
Page 298 and 299: 166 clear golden yellow colour, wit
Page 300 and 301: 168 the last peduncular joint, and
Page 304 and 305: 172 ramus narrow lanceolate, and ex
Page 306 and 307: 174 Remarks. This form was first de
Page 308 and 309: 176 Gen. 4. PorcelllO, Latr., 1804.
Page 310 and 311: 178 wards, frontal lobe less promin
Page 312 and 313: 180 4. Poreellio Rathkei, Brandt. (
Page 314 and 315: 182 plates of only the 2 anterior p
Page 316: 184 increasing in length posteriorl
Page 319: Munnopsidae. I s op i. G.O. S ars,
Page 323: Munnopsidae. G.O. S ars, autogr . I
Page 327: G.O. S ars, autogr . s op o Lig'ia
Page 331: Trichoniscidae. I s op o da. PI. 72
Page 335: Trichoniscidae. 1 S O ]3 O CLQ._ PI
Page 339: Oniscidas. I s opo da. PI. 76. G.O.
Page 343: Oniscidae. I s op o da. PI. 78. : r
Page 347: Oniscidae. I s op o da. P! . 80. G.
Page 351: Armadillidiidas. I s op i. V., V^,.
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JBopyridae. I s opo da- t G.O S ars
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Bopyridae. G.O S ars, autogr. I s o
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Bopyridae. G. 0. S ars, autogr I s
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186 Remarks. The present genus, est
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188 above-described genus Cylisticu
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190 as it is very common both in Sw
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192 Side-plates of 1st segment of r
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apparent. In the latter case, the 3
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196 simple, conic; posterior antenn
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198 Occurrence. This form is found
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200 fully grown, the parasite cause
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nier to their genus 7 \/ la '//////
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204 tal lamella, the distal edge of
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206 able want of correctness, as re
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208 branchiata. In the female, more
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210 Remarks. The present genus is v
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212 soft metasome of this Crustacea
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214 Miiller ought to be referred to
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216 and to a 'great extent encompas
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218 The genus MiCrOmSCUS, Fritz Mii
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220 tary appearance, in the present
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222 as a rule, very small and somet
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224 as Boj>-t/r/is mys'ulum and by
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226 On a closer examination, will t
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228 area in front. Caudal part of b
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230 2 middle figures on PI. 96) are
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232 shorter than the inner. Male no
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Bopyridae. I s op i. G. 0. S ars, a
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Bo py rid as. I s op o PI. G.O. S .
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Dajidae. G. 0. S ars, autogr . I s
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Dajid as. Is op o PI. 96. G. 0. S a
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234 anal segment obtusely produced
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236 Gen. 2. CryptOthlr, Dana, 1852.
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238 Aseoniscus simplex, G. 0. Sars,
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240 anal segment rounded at the tip
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242 apparatus present, Male (or las
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244 at present to state, as they ar
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246 Cryptoniseid (PI. C, fig. 3). N
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248 much more advanced stage, the o
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250 Page 122. Add the following spe
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252 Page 129. Add the 3 following s
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254 the end of the caudal segment.
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Acanthocope Acherusia Page. 131 65
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Page. crassicornis 175 Isevis 161 M
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Page. tenuicornis 23 tenuimanus 18
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PL 16. G. o. Bars. 1. Strong-ylura
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PL 84. 1. Bopyrus sqvillarum (Latr.
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2b. p 7 . Same, leg of 7th pair, ex
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cf p 3 - Same, leg of 3rd pair, cfp
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Cryptoniscidce. G.O.Sars, autogr. 1
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Cryptoniscidae. 1 S C>p O Pi. 100 G
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Desmosomidae. I S Op O da. Suppl. G
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Desmosomidae. 1 S O p O CLQ- Suppl.
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An Account of The Crustacea of Norw
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