download pdf

149
tending MS \\\r as the 3rd peduncular joint
of the inferior anteniue. Anterior
segments of mesosome short, and transversely excavated, with the lateral parts acutely
produced in front. Fifth and 6th segments confluent dorsally, and forming a
large vaulted plate deeply emarginated behind. Caudal segment semioval, edges
evenly curved and perfectly smooth. Inferior anteniue not very elongated, scarcely
exceeding by more than V4 of their length that of the body, the 2 outer joints
of the peduncle edged with slender spines, flagelluw much shorter than the peduncle.
Epignath of maxillepeds oblong lanceolate, coarsely striolate. 1st pair of legs
but little different from the 3 succeeding ones, which are rather short, scarcely
exceeding half the length of the body. Natatory legs with the propodal joint
rather broad, oval, constricted at the base, dactylus narrow lanceolate, and about
half the length of the former joint; last pair considerably smaller than the 2 pre-
ceding ones, and having the carpal joint lamellar!} 7
expanded outside. Lropoda
with the outer ramus much shorter and narrower than the inner. Colour whitish,
semipellueid. Length of adult female scarcely attaining
2 mm.
tienxn'k*. In the coalesced 5th and 6th segments of the mesosome, this
species agrees with the 2 preceding ones, but otherwise it is rather different, and
easily recognisable by the conically produced, and minutely bifurcate frontal part,
the unusually short inferior antennae and ambulatory legs, and the whitish colour.
Occurrence. I first detected this form off the Lofoten islands, at Skraa-
ven. where it is not uncommon in 100 120 fathoms, on a bottom consisting of
sandy clay. Subsequently I have also met with it in a widely distant locality,
viz.. iu the inner part of the Stavanger Fjord, at Jelso. Out of Norway this form
has not yet been recorded.
6. Eurycope mutica,
(PL LXVIIJ, %. 1.)
G. 0. Sars.
Eurycope mutica, G. 0. Sars. Om en anomal Gruppe af Isopoder. Clir. Vicl. Selsk. Fork. 18H3. p. .
Specific Characters. Body broadly oval, greatest width exceeding
length and occurring in the middle. Frontal part of cephalon
half the
rather broad and
obtusely rounded at the tip. Anterior segments of mesosome with the lateral
parts not acutely produced in front; 5th and 6th segments imperfectly defined
dorsally. Caudal segment not very large, slightly coarctated towards the tip.
which is narrowly rounded, lateral edges setiferous. Superior antenna? compara-
tively small, flagellum composed of only
5 or 6 articulations. Inferior antenna?
very slender, fully twice as long as the body, flagellum more than twice the
length of the peduncle. Epignath of inaxillipeds short and broad, obtusely trun-
cated at the tip. 1st pair of legs with the propodal joint much shorter than