A monograph of the British fossil corals - kreidefossilien.de
A monograph of the British fossil corals - kreidefossilien.de
A monograph of the British fossil corals - kreidefossilien.de
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INTRODUCTION.<br />
hix<br />
17. Genus Goniophyllum.<br />
Corallum simple, and affecting <strong>the</strong> form <strong>of</strong> a quadrangular pyramid. Calice <strong>de</strong>ep and<br />
square. Septa thick and well <strong>de</strong>veloped. Tabula central, and but little <strong>de</strong>veloped.<br />
Typ. sp., Goniophyllum pyramidale ; Turbinolia pyramidalis, Hisinger, Lethaea Suecica, tab. xviii, fig. 12.<br />
18. Genus Chonophyllum.<br />
Corallum simple, and constituted principally by a series <strong>of</strong> infundibuliform tabula, superposed<br />
and invaginated, <strong>the</strong> surface <strong>of</strong> which presents numerous septal radii equally <strong>de</strong>veloped,<br />
and extending from <strong>the</strong> centre to <strong>the</strong> circumference. No columella nor walls.<br />
Typ. sp., Chonophyllum perfoliatum ; Cyathophyllum perfoliatiim, Goldfuss, tab. .xviii, fig. 5.<br />
19. Genus Ptychophylltjm.<br />
Strombo<strong>de</strong>s {pars), Lonsdale, Sil. Syst., p. G91, 1839 (not Schweigger.).<br />
Corallum simple, and organized as in <strong>the</strong> preceding genus, but having <strong>the</strong> septal radii<br />
strongly twisted towards <strong>the</strong> centre <strong>of</strong> <strong>the</strong> tabulte, so as to constitute a spurious columella.<br />
Typ. sp., Ptychophyllmn Sto/cesi, nob. ; C. Stokes, Ti'ans. <strong>of</strong> <strong>the</strong> Gaol. Soc, 2d series, vol. i, tab. .xxi.x,<br />
fig. 1. (N.B. The second figure bearing this number, but not <strong>the</strong> first.)<br />
20. Genus Heliophyllum.<br />
Hall, in Dana, Zooph., p. 396. 1846.<br />
Corallum simple. Septal apparatus well <strong>de</strong>veloped, and producing lateral lamellar<br />
prolongations, which extend from <strong>the</strong> wall towards <strong>the</strong> centre <strong>of</strong> <strong>the</strong> visceral chamber,<br />
so as to represent ascending arches and to constitute irregular central tahula, and which<br />
are united towards <strong>the</strong> circumference by means <strong>of</strong> vertical dissepiments.<br />
Typ. sp., Heliophyllum Halli, nob. ; Strombo<strong>de</strong>s helianthoi<strong>de</strong>s. Hall, Geol. <strong>of</strong> New York, No. 48, fig. 3<br />
(not S. helianthoi<strong>de</strong>s <strong>of</strong> Phillips).<br />
21. Genus Meteiophyllum.<br />
Corallum simple, turbinate. Septa well <strong>de</strong>veloped, slightly twisted, and extending to<br />
<strong>the</strong> centre <strong>of</strong> <strong>the</strong> visceral chamber, through well-<strong>de</strong>veloped tabulm.<br />
Typ. sp., Metriophyllum Boiichardi, nob. ; Cyathophyllum mitratum, Michelin, Icon, Zooph., tab. xl?ii,<br />
fig. 7 (not C, mitratum <strong>of</strong> Schlo<strong>the</strong>im).