122 



PROF. P. MARTIN DUJ^CAN's REVISION OF THE 



absent. Septa unequal, slender, not exsert, low vertically, 

 entire. Pali just within tlie primaries, small, distinct, narrow, 

 granular, ridged. Costse well developed, and do not unite with 

 those of other calicos. Endotheca abundant, closing the calicular 

 fossa as if by tabulae. 



Distribution. — Fossil. Cretaceous : England. 



Grenus Styloc(enia, Milne-Edwards Sf Jules Saime, Hist. Nat. 

 des Corall. vol. ii. p. 250, amended. (See Pal. Indica, ser. xiv. 

 Corals of Sind, for illustrations.) 



The colony is in the form of a thick lamina with the base covered 

 with a well- developed epitheca. The corallites are united by 

 their walls, which are thin and prismatic. The calices are poly- 

 gonal, with simple margins. The columella is styliform and pro- 

 jecting. The septa are thin, not numerous. At some of the 

 angles where calices join, there are erect columns, narrow-grooved 

 and various in height according to the species. In perfect forms 

 these columns are either pointed at the top, or bear an aborted 

 calice, the groovings and intermediate ridges being the intercostal 

 spaces and costse. G-emmation marginal. 



Distribution. — Fossil. Oolite : England. Eocene : England, 

 Europe, Sind in Asia, West Indies. Miocene : Europe. 



Mr. Tomes has described two species of a genus which he 

 has diagnosed and named Bathycoenia. The habit of the forms 

 is that of Stylocoenia ; and the nodular elevations between the 

 calices are clearly in relation to gemmation. The descriptions 

 and figures of the Stylocoenians from Sind, Pal. Indica, ser. xiv. 

 (' Eossil Corals and Alcyonaria from Sind,' 1882), were doubtless 

 unknown to Mr. Tomes. The worn condition of the calices of the 

 BathycoenicB, which are very rare corals, is evident ; but the 

 columella, although ragged in transverse outline, may have been 

 styliform. 



I mention the genus, but do not place it definitely. 



Genus BAXHTCffiNiA, Tomes, Quart. Journ. Geol. Soc. 1883, p. 176. 



Colony turbinate, attached. Corallites united intimately by 

 their walls. Investing common wall costulated, and has epitheca. 

 Calicular surface convex. Calices more or less pentagonal, or 

 rounded and deep. Septa entire, thin, project but little into the 

 calice, rise in obtuse points where they meet those of other calices 

 on the wall. Primaries meet to form a ragged columella. Cali- 

 cular angles with obtuse points. G-emmation at obtuse points. 



Distribution. — Fossil. Oolite : England. 



