A monograph of the British fossil corals - kreidefossilien.de

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xii BRITISH FOSSIL CORALS. chamber, and containing neither dissepiments, as in the Astreidse, nor synapticulse, as in the Fungidae. Walls thin, lamellar, and imperforated. Septa highly developed, simple, compact, in general regularly granulated on each side, and never den ticidated orlobulated at then- apex. Costte in general well marked and straight. No coenenchyma in the compound Polypidoms. First Tribe—CYATHININiE. Milne Edwards and J. Haime, loc. cit., p. 289, 1848. CaUcule presenting one or more rows of pali, placed between the columella and the septa. § 1 . A single coronet of pali. 1. Genus Cyathina. Caryopkyllia, Stokes. Zool. Journ., vol. iii, p. 486, 1828. Cyathina, Ehrenberg. Corall. des RotLen Meeres, p. 76, 1834 ; Milne Edwards and J. Haime, op. cit., p. 285. CoraUum simple, never gemmiparous, subtm'binate and adherent. Calice circular or nearly so, mth a broad but not very deep central fossula. Columcllu fasciculate, composed narrow, and twisted lamellar processes, and termi- of a certain number (3 to 20) of vertical, nated by a convex, crispate surface. Pali broad, entire, free in a considerable part of their length, and equally developed. Septa straight, broad, exsert, and forming six systems, which are in general unequally developed, and become in appearance much more numerous. Costoi straight, slightly prominent near the calice, more or less obsolete lower down, delicately granulated, and never armed with tubercles, crests, or spines. Typical species, Cyathina cyathiis, Elirenb., loc. cit. ; Milne Edwards and J. Haime, Ann. des Sc. Nat., 3"" serie, torn, is, tab. iv, fig. 1. 2. Gemis Ccenocyathus. Milne Edwards and J. Haime, Ann. des Sc. Nat., 3"" serie, torn. Lx, p. 297, 1848. CoraUum composite and adherent ; the corallites sub-cylindrical, rather tall, segregate (united near their basis, but free in the greatest part of their length), and not grouped in rows. Calice circular; fossula not very deep. Columella composed of a few twisted, lamellar, vertical processes. Pali entire, equidistant from the centre, and similar in size. Septa rather broad, not projecting much above the walls, and forming fom- cycla, the last of which is incomplete in one of the six systems. Costce distinct near the calice only, straight, flat, broad, and delicately granulated. These Corals have great affinity to Cyathina, from which they differ principally by their gemmiparous mode of multipUcation, and the permanent union of the young to the parent. Typ. sp., Ccenocyathus cylindricus, Milne Edw. and J. Haime, loc. cit., tab. i.\, fig. 8.
INTRODUCTION. xiii 3. Genus Acanthoctathus. Milne Edw. and J. Haime, loc. cit., p. 292, 1848. Corallum simple, free, subtui'binate, slightly compressed, and subpediceUate. Calice more or less oval. Columella and pali as in Cyathina. Septa broad, exsert, and forming five cycla ; systems unequally developed, so as to form sixteen groups. Costce partly avmod with crests or spines. Typ. sp., Acanthocyathus Grayi, Milue Edw. and J. Haime, loc. cit., tab. ix, fig. 2. 4. Genus Bathycyathus. Milne Edw. and J. Haime, loc. cit., p. 294, 1848. Corallum simple, adherent by a broad Isasis, tall, subturbinate, and slightly compressed. Calice subelliptical, with a broad and very deep fossula. Columella small and crispate. Pali narrow, feeble, entire, and closely united to the septa. Sejjta exsert, thin, closely set, and forming apparently twelve equally developed systems ; five cycla, the last of which is more developed than the penultimate one, the septa of which are closely approximated towards the wall, or even cemented to those of the primary, secondary, and ternary cycla. Cosf(e very narrow, straight, unarmed, deUcately granulated, and distinct down to the basis of the corallum. Typ. sp., Bathycyathus chilensis, MUne Edw. and J. Haime, loc. cit., tab. ix, fig. 5. .5. Genus Brachycyathus. Milue Edw. and J. Haime, loc. cit., p. 295, 1848. Corallum simple, extremely short, widening very rapidly, and becoming free in the adult state. Calice circular, and very slightly excavated. Columella very thick, fasciculate, and terminated by cucular papilla;. Pali very broad, entire. Septa exsert, narrow, and forming four cycla ; the systems equally developed, and apparently twelve in number. CostcB unarmed. Typ. sp., Bracliycyathus Orbignyanus, Milne Edw. and J. Haime, loc. cit., tab. ix, fig. G. 6. Genus Discocyathus. Milne Edw. and J. Haime, loc. cit., p. 296, 1848. Corallum simple, free, and discoidal. Calice cu-cular and slightly convex. Columella formed by a single vertical lamina; its apex smooth and undivided. Pali free and corresponding to the septa of the antepenultimate cyclum. Sejjta very exsert, broad, and striated laterally near their apex. Wall horizontal, and covered with an epitheca presenting some concentric stria?. Typ. sp., Discocyathus Eudesii, Milue Edw. and J. Haime, loc. cit., tab. ix, fig. 7.
Page 5: THE PALiEONTOGRAPHICAL SOCIETY. INS
Page 8 and 9: i. E. ADLJIED, PBINTr.B, BARTHOLOME
Page 10: e 7b-^,pi'? PRINTED BY C. AND .1. A
Page 13 and 14: INTRODUCTION. iii centre of the ram
Page 15 and 16: INTRODUCTION. v certain parts of th
Page 17 and 18: INTRODUCTION. vii in which the mult
Page 19 and 20: INTRODUCTION. ix Sub-class 1. CORAL
Page 21: ; INTRODUCTION. xi Sub-order 1. ZOA
Page 25 and 26: ; INTRODUCTION. xv formed by proces
Page 27 and 28: ; INTRODUCTION. xvii IS. Genus Plat
Page 29 and 30: INTRODUCTION. xix Aberrant Group. P
Page 31 and 32: INTRODUCTION. xxi 8. Genus Amphelia
Page 33 and 34: INTRODUCTION. xxiii 3. Genus Dkndra
Page 35 and 36: INTRODUCTION. xxv 5. Genus Ccelosmi
Page 37 and 38: INTRODUCTION. xxvii in the two prec
Page 39 and 40: ; INTRODUCTION. xxix 23. Genus Pler
Page 41 and 42: ; INTRODUCTION. xxxi 30. Genus Hete
Page 43 and 44: INTRODUCTION. xxxiii 30. Genm Symph
Page 45 and 46: ;; INTRODUCTION. xxxv 44. Gentts Tr
Page 47 and 48: LNTRODUCTION. xxxvii 50. Genus Dipl
Page 49 and 50: INTRODUCTION. xxxix Section IV.—
Page 51 and 52: ; INTRODUCTION. xli 64. Genus Astro
Page 53 and 54: INTRODUCTION. xliii which thus form
Page 55 and 56: ; INTRODUCTION. xlv 79. Genus Oclan
Page 57 and 58: INTRODUCTION. xlvii 4. Genus Micbab
Page 59 and 60: 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,
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INTRODUCTION. Ixiii Family X. SERIA
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; INTRODUCTION. Ixv Family XIII. CY
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INTRODUCTION. kvii 7. Gejius Hallia
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INTRODUCTION. hix 17. Genus Gonioph
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INTRODUCTION. Ixxi or costal radii
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INTRODUCTION. • Ixxiii The genera
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INTRODUCTION. Ixxv Family I. ALCYON
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INTRODUCTION. Ixxvii Second Tribe
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INTRODUCTION. Ixxix 1 7. Ge?ius Dis
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INTRODUCTION. Ixxxi 8. Genus Soland
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INTRODUCTION. Ixxxiii 3. Ge7lUS ViR
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INTRODUCTION. Ixxxv Order 3. PODACT
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CORALS OF THE UPPER CHALK. 46 towar
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CORALS OF THE UPPER CHALK. 47 Famil
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: CORALS FROIM THE UPPER CHALK. 49
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CORALS FROM THE UPPER CHALK. 51 Tho
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CORALS FROM THE LOWER CHALK. 53 CHA
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CORALS FROM THE LOWER CHALK. 55 the
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CORALS FROM THE UPPER GREENSAND. 57
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; CORALS FROM THE UPPER GREENSAND.
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CORALS FROM THE GAULT. CHAPTER VI.
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; CORALS FROM THE GAULT. 03 3. Genu
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CORALS FROM THE GAULT. 65 found nea
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CX)RALS FROM THE GAULT. G7 and have
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' Petref. : ; CORALS FROM THE GAULT
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; CORALS FROM THE LOWER GREENSAND.
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TAB. IX. CORALS FROM THE UPPER CHAL
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TAB. XI. CORALS FROM THE GAULT. Cya
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302 TABLE OF BRITISH FOSSIL CORALS.
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304 TABLE OF BRITISH FOSSIL CORALS.
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A. GENERAL INDEX;
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308 GENERAL INDEX.
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310 GENERAL INDEX.
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312 GENERAL INDEX. Dendrophyllia de
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314 GENERAL INDEX. . Halysites cate
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310 GENERAL INDEX.
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318 GENERAL INDEX.
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320 GENERAL INDEX.
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322 GENERAL INDEX. Xenia Zaphrentis
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