A monograph of the British fossil corals - kreidefossilien.de

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1 BRITISH FOSSIL CORALS. 20. Genus Pachyseris. Milue Edw. and J. Haime, loc. cit., p. 72, 1849. Corallum similar to Agaricia, excepting that the corallites belonging to the same trench are completely blended together. Columella well developed and dense. Typ. sp., Pachyseris rugosa, nob. ; Agaricia rugosa, Lamarck, Hist, des An. sans Vert., t. ii, p. 243. 2L Genus Phvllastrea. Helioseris, Dana, Zooph., p. 2G9 ; Milne Edw. and J. Haime, loc. cit., p. 72, 1849. Corallum composite, composed of frondiforni expansions. Calices circumscribed, submamraillate, and arranged around the parent corallite, which remains larger than the others. Columella tubercular. Typ. sp., Phyllastrea tubifex, Dana, loc. cit., tab. xvi, fig. 4. 22. Genus Haloseris. Milne Edw. and J. Haime, loc. cit., p. 72, 1849. Corallum composite, forming foliaceous, crispate, lobulate expansions, the upper surface of which is covered with very long radii, and shows only obsolete calices. Columella rudimentary. T3'p. sp., Haloseris lactuca, Milne Edw. and J. Haime, loc. cit. 23. Genus Leptoseris. Milne Edw. and J. Haime, loc. cit., p. 72, 1849. CoraUum composite and adherent ; the basal walls rising so as to constitute a subcrateriform disc, in the centre of which is situated a large parent corallite, surrounded by smaller ones. Calices very imperfectly circumscribed, but well radiated. Septa very long. Columella rudimentary. Typ. sp., Leptoseris fragilis, Milne Edw. and J. Haime, loc. cit. Sub-order 2. ZOANTHARIA PERFORATA. Corallum composed essentially of porous sclerenchyma ; with the septal apparatus well characterised, and consisting of six primitive elements, but being sometimes represented only by series of trabiculse. Dissepiments rudimentary ; no tabulas. The principal character of this section of Zoantharia is furnished by the structure of
INTRODUCTION. li the sclerenchyma, which, instead of forming imperforated lamella as in the preceding groups, is always porous, or even reticulate. In general the mural apparatus constitutes here the greatest part of the corallum, and does not consist of costal laminae ; the walls are always perforated, and completely or nearly completely naked. It is also to be remarked, that the visceral chamber is almost completely open from top to bottom, and never filled up with dissepiments or synapticulae, as in most of the Zoantharia aporosa, or with tabulte, as will be seen in the next two sections of this order. The perforated Zoantharia form three natm-al families : Eupsammidse, Madreporidse, and Poritidse. Family V. EUPSAMMIDtE. Milne Edw. and J. Haime, Ann. des Sc. Nat., 3"' serie, vol. x, p. (j5, 1848. Corallum simple or complex, with well-developed lamellar septa, a spongiose columella, and perforated, granular, subcostulated walls. The septa are always numerous, and those of the last cyclum are never situated in the direction of a line drawn from the centre of the calice to its circumference, but are bent towards those of the penultimate cyclum, so as to produce the appearance of a six- or twelve-branched star. The interseptal loculi are completely open from top to bottom, or divided only by a few incomplete trabiculge. The walls have a granulate vermiculate surface, and become often very thick in advanced age, but never constitute a loose spongy mass, as in Madreporidse and Poritidac, or a compact ccenenchyma, as in Oculinidse. The star-like arrangement of the septa, which is visible in transverse sections of these corallums, as well as in the calice, is not met with in any other family. The principal septa are sometimes imperforate, but those of the succeeding cycla are more or less porous. It is also to be noted that there are never any pali, and that the costae are always rudimentary ; sometimes there is a rudimentary epitheca. I. Genus Eupsammia. Milne Edw. and J. Haime, Ann. Sc. Nat., 3""" serie, vol. .x, p. "7, 1848. Corallum simple, subtm-binate, free, and not presenting any lateral mural expansions. Calice oval and rather deep. Se'pta broad, slightly exsert, granulate, closely set, and forming four or five cycla. Costa simple, distinct from the basis of the corallum, nearly equal, slightly vermiculate, and composed of a series of distinct, projecting granulse. Typ. sp., Eupsammia trochiformis, Milne Edw. and J. Haime, loc. cit., tab. i, fig. 3 ; Madrepora trochiformis, Pallas ; Turbinolia elUptica, Brongniart.
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THE PALiEONTOGRAPHICAL SOCIETY. INS
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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 and 24: INTRODUCTION. xiii 3. Genus Acantho
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: INTRODUCTION. xlix 14. Genus Ctclos
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
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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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