A monograph of the British fossil corals - kreidefossilien.de

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xiv BRITISH FOSSIL CORALS. 7. Genus Cyclocyathus. Corallum simple, cliscoidal, and having the same characters as the preceding genus, except tliat the columella is fasciculate and papillous. Typ. sp., Cyclocyathus Fittonii, nob. ^ 2. Pali of divers orders, forming two or more coronets. 8. Genus Trochocyathus. Milne Edw. and J. Haime, loc. cit., p. 300, 1848. Corallum simple, pediculate or sub-pediculate, but free in the adult state. Calice with a broad but not very deep fossula. Columella well developed, and composed of prismatic or twisted processes disposed fascicvdarly or in a single row. Pali well developed, entu-e, free on both edges, and differing in breadth according to the coronet to which they belong. Septa very exsert, broad, thick near the wall, striated laterally, and forming from four to six cycla. Costa often armed. Typ. sp., Trochocyathus mitratus, nob. (T". mitratus et T. plicatus, Milne Edw. and J. Haime, loc. cit., p. 303) ; Turbinolia mitrata, Goldfuss, op. cit., pi. xv, fig. 5 ; Turbinolia plicata, Michelotti, Specim. Zooph. dil., tab. ii, fig. 9. 9. Genus Leptocyathus. by its Corallum presenting most of the characters of the preceding genus, from which it differs subdiscoid form, and its not shomng any trace of adherence. Typ. sp., Leptocyathus elegans, nob. 10. Genus Thecocyathus. Milne Edw. and J. Haime, loc. cit., p. 317, 1848. Corallum simple, very short, and adherent, at least when young. Calice circidar, with the fossula shallow. Columella very large, fascicidate, formed by a great number of prismatic processes, and terminated by a flat papillous apex. Pali thick, narrow, short, and entire, those corresponding to the penultimate cyclum of septa the most developed. Septa not exsert, thick, closely set, and almost equally developed ; systems equally developed. Wall covered by a complete ejntheca, slightly striated transversely, and constituting around the calice a small projecting ring. Typ. sp., Thecocyathus tiiitinnabulum, Milne Edw. and J. Haime, loc. cit., p. 317; Cyathophyllum tintinnabulum, Goldfuss, Petref. Germ., tab. xvi, fig. 6. 11. Ge7ius Paracyathus. Milne Edw. and J. Haime, loc. cit., p. 318, 1848. Corallum simple, subturbinate, and having a broad adlierent basis. Calice with a large but not very deep fossida. Columella very broad, terminated by a papillous smface, and
; INTRODUCTION. xv formed by processes that appear to arise from the lower part of the inner edge of the septa. Pali in general lobnlated at their apex, narrow, tall, and appearing also to proceed from the inferior part of the margin of the septa, then- size diminishing as they approach nearer to the columella. Septa nearly equal, very slightly exsert, and closely set, theu- lateral surface strongly granulated, and presenting sometimes traces of imperfect dissepiments fom' or five cycla ; systems equally developed. Codce nearly equal, straight, closely set, projecting very little, and delicately granulated. Typ. sp., Paracyathus procumbens, Milue Edw. and J. Haime, loc. cit., tab. s, fig. 6. 12. Genus Heteroctathus. Milne Edw. and J. Haime, loc. cit., p. 323, 1848. Corallum simple, sub-cylindrical, extremely short, and adherent by a basis at least as broad as the calice, but appearing free, because in the adult state it iml)cds in its tissue the small shell to which it is fixed. Calice cu'cular, or nearly so, with a broad, deep fossula Columella small, and composed of very slender vertical styli. Pali broad, thin, and denticulate. Septa very exsert, broad, thick, and covered with conical granulations aiTanged in radiate series ; four or five cycla, the last of which is more developed than the penultimate one, and composed of septa that diverge from the older septa as they advance towards the centre of the visceral chamber. Costce straight, thick, closely set, and strongly granulated. Typ. sp., Heterocyatlius cequicostatus, Milue Edw. and J. Haime, loc. cit., tab. x, fig. 8. 13. Gemis Deltocyathus. Milne Edw. and J. Haime, loc. cit., p. 325, 1848. Corallum short, conical, free, and presenting no trace indicating its having been adherent when young. Calice circular, and almost flat. Columella multipartite. Pali highly developed, and very unequal, those of the penultimate circle the largest, and turned towards those of the antepenultimate row, so as to form with them a series of deltse. Sejjfa slightly exsert. Costa straight, unequal, distinct down to the basis of the corallum, and strongly granulated, so as to assume a monihform appearance. Typ. sp., Beltocyathus italicus, Milne Edw. and J. Haime, op. cit., tab. x, fig. 11 ; Stephanophyllia italica, Michelin, Icon. Zoopb., tab. viii, fig. 3. 14. Ge7ius Tropidocyathus. MOne Edw. and J. Haime, loc. cit., p. 326, 1848. Corallum simple, free, presenting no trace of former adherence, compressed, and having at its basis a large, thick, transverse, vertical crest, or two projecting lobes, resembling wings, or the fins of sepia. Calice elliptic and arched, its small axis being much higher than its long axis ; fossula not very deep. Columella oblong and multipartite. Pali entire ; those corresponding to the penultimate cycluni of septa taller and broader than the others. Septa exsert ; the six systems equally developed. Costce well marked, especially at the upper part of the wall, and covered with small granulations. Typ. sp., Tropidocyathus Lessoitii, MOne Edw. and J. Haime, loc. cit. ; Flahelbim Lessonii, Michelin, in Gueriu's Mag. de ZooL, 1843, tab. vi.
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 and 22: ; INTRODUCTION. xi Sub-order 1. ZOA
Page 23: INTRODUCTION. xiii 3. Genus Acantho
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,
Page 73 and 74: 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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