A monograph of the British fossil corals - kreidefossilien.de

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; CORALS FROM THE UPPER GREENSAND. 59 Tribe ASTREIN.^ (p. xxxi). Genus Parastrea (p. xliii). Parastkea stkicta. Tab. X, fig. 3, 3 a. Corallum composite, forming a mass not very tall, and slightly convex on its upper surface. Calices seldom circular, in general oblong or irregularly polygonal, projecting very little, and having always distinct margins. CosfcB delicate, closely set, nearly equal, almost horizontal, nearly straight or slightly bent, and united by their extremity to those of the neighbouring corallites, which, however, remain ch'cumscribed by a small furrow. Calicularfossula shallow. Columella of a dense tissue, subpapillose, and not much developed. Septa thin, broad, closely set, terminated by a series of calicular dentations, the last of which (towards the columella) appears to be more developed than the others ; the number of these septa seldom exceeds forty, and they are rather unequal. Walls thin, but well developed. Diameter of the calices, usually between two lines and two lines and a half distance between the calices, at least half a line. This species, found in the Greensand at Blackdown, is characterised from a specimen belonging to the Geological Society ; it differs from all the previously described Parastrea by the approximation and delicate structure of the septa. Mr. Morris mentions, in his Catalogue ' of British Fossils,'^ two other species which have been found by M. Austen in the Greensand at Haldon, and which belong to the family of Astreidge. M. Austen considers the one as being identical with the Maestricht fossil coral described by Goldfuss under the name of Astrea clec/ans^ and he refers the other to the Astrea escharoidci of the same author*. We regret not having had an opportunity of examining these fossils. ^ Loc. cit., p. 31. - Petref. Germ., vol. i, tab. xxiii, fig. 6. 3 Goldfuss, op. cit., tab. xxiii, fig. 2 ; fossil from Maestricht. ^ Austen, on the Geol. of the South-east of Devonshire, Trans, of the Geol. Soc, Second Series, vol. vi, p. 452.
60 BRITISH FOSSIL CORALS. Family FUNGIDiE (p. xlv). Genus Micrabacia (p. xlvii). MiCRAEACiA coRONULA. Tab. X, fig. 4, 4 a, 4 b, 4 c. Cyclolites, W. Smith, Strata identified by Organic Fossils, p. 12; Greensand, p. 15, 1816. FuNGiA COKONULA, GolJfuss, Petref. Germ., vol. i, p. 50, tab. xiv, fig. 10, 1826. — — F.A.R(eme);D\e Verstein. des Norddeutscbeu Kreidegebirges, p. 25, 1840. — — Morris, Cat. of Brit. Fossils, p. 38, 1843. FuNGiA CLATHRATA (?) Geinitz, Grundriss der Versteiueruugskuude, tab. .xxiii, fig. 2, 1849. Corallum simple, lenticular, short ; its under surface horizontal or slightly concave ; its upper surface somewhat convex. Mm-al disc completely naked and regularly perforated by small intercostal pores. Costce closely set, almost straight, equally narrow, not prominent, and but slightly echinulated ; only twelve of them arise in the centre of the disc, but these soon bifurcate, and the twenty-four costse so formed soon divide again ; at about half the distance from the centre to the circumference of the disc each costa bifiu-cates once more, and the two terminal costaj so formed are grouped two by two towards the periphery of the disc. The granulations which form all these costse are not very distinct, and are arranged in single lines. Calicular fossula small and not very deep, but well marked and rather elongated laterally. Columella very small, oblong, and subpapillose. Septa forming five complete cycla, and corresponding to the intercostal spaces ; those of the last cyclum quite rudimentary; the others tall, thhi, straight, and united by sub-spiniform trabiculae. Those of the first cyclum larger than the others, and augmenting slightly in thickness towards the middle ; the secondary ones almost as large ; all delicately denticulated along their upper edge, and much thinner towards iheir outer and inferior angle than in any other part. Diameter, three or sometimes four lines ; height, one line and a half. The above-described fossils were found in the Greensand at Warminster, in Wiltshire, and according to William Smith, who was the first author that mentions this fossil, are also met with at Chute Farm and Puddle Hill, near Dunstable. By an attentive conqoarison wth the specimens described by Goldfuss, and belonging to the PoppelsdorfF Museum at Bonn, we have ascertained the specific identity of this British Coral with the Fungia coronula found in the chalk of Essen. Specimens exist in Mr. Bowerbank's cabinet, and in the collections belonging to the Geological Society, the Museum of Paris, the Museum of Bonn, and M. Defrance at Sceaux, who has designated it by the unpublished name of Fungia duhia.
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THE PALiEONTOGRAPHICAL SOCIETY. INS
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i. E. ADLJIED, PBINTr.B, BARTHOLOME
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e 7b-^,pi'? PRINTED BY C. AND .1. A
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INTRODUCTION. iii centre of the ram
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INTRODUCTION. v certain parts of th
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INTRODUCTION. vii in which the mult
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INTRODUCTION. ix Sub-class 1. CORAL
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; INTRODUCTION. xi Sub-order 1. ZOA
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INTRODUCTION. xiii 3. Genus Acantho
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; INTRODUCTION. xv formed by proces
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; INTRODUCTION. xvii IS. Genus Plat
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INTRODUCTION. xix Aberrant Group. P
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INTRODUCTION. xxi 8. Genus Amphelia
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INTRODUCTION. xxiii 3. Genus Dkndra
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INTRODUCTION. xxv 5. Genus Ccelosmi
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INTRODUCTION. xxvii in the two prec
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; INTRODUCTION. xxix 23. Genus Pler
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; INTRODUCTION. xxxi 30. Genus Hete
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INTRODUCTION. xxxiii 30. Genm Symph
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;; INTRODUCTION. xxxv 44. Gentts Tr
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LNTRODUCTION. xxxvii 50. Genus Dipl
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INTRODUCTION. xxxix Section IV.—
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; INTRODUCTION. xli 64. Genus Astro
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INTRODUCTION. xliii which thus form
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; INTRODUCTION. xlv 79. Genus Oclan
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INTRODUCTION. xlvii 4. Genus Micbab
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INTRODUCTION. xlix 14. Genus Ctclos
Page 61 and 62: INTRODUCTION. li the sclerenchyma,
Page 63 and 64: INTRODUCTION. liii 7. Genus Stephan
Page 65 and 66: INTRODUCTION. Iv Family VII. PORITI
Page 67 and 68: . INTRODUCTION. Ivii Second Tribe
Page 69 and 70: INTRODUCTION. lix 4. Genus Fistulip
Page 71 and 72: INTRODUCTION. hi but much shorter,
Page 73 and 74: INTRODUCTION. Ixiii Family X. SERIA
Page 75 and 76: ; INTRODUCTION. Ixv Family XIII. CY
Page 77 and 78: INTRODUCTION. kvii 7. Gejius Hallia
Page 79 and 80: INTRODUCTION. hix 17. Genus Gonioph
Page 81 and 82: INTRODUCTION. Ixxi or costal radii
Page 83 and 84: INTRODUCTION. • Ixxiii The genera
Page 85 and 86: INTRODUCTION. Ixxv Family I. ALCYON
Page 87 and 88: INTRODUCTION. Ixxvii Second Tribe
Page 89 and 90: INTRODUCTION. Ixxix 1 7. Ge?ius Dis
Page 91 and 92: INTRODUCTION. Ixxxi 8. Genus Soland
Page 93 and 94: INTRODUCTION. Ixxxiii 3. Ge7lUS ViR
Page 95: INTRODUCTION. Ixxxv Order 3. PODACT
Page 98 and 99: CORALS OF THE UPPER CHALK. 46 towar
Page 100 and 101: CORALS OF THE UPPER CHALK. 47 Famil
Page 102 and 103: : CORALS FROIM THE UPPER CHALK. 49
Page 104 and 105: CORALS FROM THE UPPER CHALK. 51 Tho
Page 106 and 107: CORALS FROM THE LOWER CHALK. 53 CHA
Page 108 and 109: CORALS FROM THE LOWER CHALK. 55 the
Page 110 and 111: CORALS FROM THE UPPER GREENSAND. 57
Page 114 and 115: CORALS FROM THE GAULT. CHAPTER VI.
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Page 118 and 119: CORALS FROM THE GAULT. 65 found nea
Page 120 and 121: CX)RALS FROM THE GAULT. G7 and have
Page 122 and 123: ' Petref. : ; CORALS FROM THE GAULT
Page 124: ; CORALS FROM THE LOWER GREENSAND.
Page 130: TAB. IX. CORALS FROM THE UPPER CHAL
Page 138: TAB. XI. CORALS FROM THE GAULT. Cya
Page 142 and 143: 302 TABLE OF BRITISH FOSSIL CORALS.
Page 144 and 145: 304 TABLE OF BRITISH FOSSIL CORALS.
Page 146 and 147: A. GENERAL INDEX;
Page 148 and 149: 308 GENERAL INDEX.
Page 152 and 153: 312 GENERAL INDEX. Dendrophyllia de
Page 154 and 155: 314 GENERAL INDEX. . Halysites cate
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322 GENERAL INDEX. Xenia Zaphrentis
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