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
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
.<br />
INTRODUCTION.<br />
Ivii<br />
Second Tribe—MONTIPORIN.E.<br />
CcBnenchyma abundant and spongy.<br />
9. Genus Alveopora.<br />
Quoy and Gaimard, Voyage <strong>de</strong> 1' Astrolabe, Zooph., p. 240, 1833.<br />
Corallum arborescent. Cmnenchi/ma very porous and ecliinulate, but not bearing large<br />
excrescences. Margins <strong>of</strong> <strong>the</strong> calices scarcely distinct. Septa not numerous, and formed<br />
by series <strong>of</strong> spiniform processes. No columella.<br />
Typ. sp., Alveopora rubra, Quoy and Gaim., loc. cit., Zoopb., tab. sis, figs. 11-14.<br />
10. Genus Montipora.<br />
Quoy and Gaimard, op. cit., p. 247, 1833; Manopora, Dana, Zooph., p. 489, 1846.<br />
Corallum <strong>of</strong> various forms, differing from Alveopora by <strong>the</strong> existence <strong>of</strong> large projections<br />
<strong>of</strong> <strong>the</strong> coenenchyma between <strong>the</strong> cahcules. Ccenenchpiia much more abundant, and<br />
more <strong>de</strong>licately spongy.<br />
Typ. sp., Montipora verrucosa, Quoy and Gaim., op. cit., Zoopb., pi. x.\, fig. 1 1<br />
11. Ge7lUS PsAMMOCORA.<br />
Dana, Zoopb., p. 344, 1846.<br />
CfBnencliyma somewhat compact, <strong>of</strong> a fasciculate structiu-e, and having its surface<br />
papillose. Calices very shallow, confluent, and without distinct walls. Septa thick, and<br />
formed by strong spiniform processes.<br />
Typ. sp., Psammocora obtusata, Dana, loc. cit., p. 345 ; Pavonia obtusangula, Lamarck, Hist, <strong>de</strong>s<br />
An. sans Vert., t. ii, p. 240.<br />
Sub-or<strong>de</strong>r 3.<br />
ZOANTHARIA TABULATA.<br />
Corallum essentially composed <strong>of</strong> a well-<strong>de</strong>veloped mural system, and having <strong>the</strong> visceral<br />
chambers divi<strong>de</strong>d into a series <strong>of</strong> stories by complete transverse tabulae or diaphragms.<br />
Septal apparatus rudimentary.<br />
The principal character <strong>of</strong> this sub-or<strong>de</strong>r is foun<strong>de</strong>d on <strong>the</strong> existence <strong>of</strong> <strong>the</strong> lamellar<br />
diaphragms that close <strong>the</strong> visceral chamber <strong>of</strong> <strong>the</strong> corallites at different heights,<br />
and chffer<br />
from <strong>the</strong> dissepiments <strong>of</strong><br />
<strong>the</strong> Astreida; by not being <strong>de</strong>pen<strong>de</strong>nt on <strong>the</strong> septa, and forming<br />
as many complete horizontal divisions extending from si<strong>de</strong> to si<strong>de</strong> <strong>of</strong> <strong>the</strong> general cavity,<br />
S