1867.] DUNCAN WEST-INDIAN CORALS. 17 



Placotrochfs Lonsdalei, nobis (Quart. Joiu'ii. Geol. Soc. vol. xix. 

 p. 428, plate xv. fig-s. 2a and 2b). 



The artist has omitted the columella. 



It is remarkable that two species of Placotrochas should be found 

 fossil in the South Australian Tertiary* deposits ; but the genus is 

 extinct in the Caribbean area. 



POCILLOPORA CRASSORAMOSA, nobis. 



Reuss has lately described a Fonlhpora (P. Jenhim^i) from Java, 

 and notices its resemblance to the San-Domingan species. There is 

 also a species in the Antiguan Tcrtiaries. 



Antillia, genus nobis (Quart. Journ. Geol. Soc. vol. xx. p. 28). 



This genus, which embraces Montlivaltke with columellse, has at 

 least six well-marked species in the Miocene. The smallest are dis- 

 coid, the rest being more or less turbinate. 



M. de Fromentel does not interest himself in Tertiary Corals ; 

 otherwise that excellent observer and able palceontologist would have 

 been spared the necessity of introducing his genus Ci/atJiophylUa in 

 18G5. See Pal. Franc. Terrain Jurassique, p. 86. 



Cartophyllia afeinis, nobis, 1863. 



It is proposed to adopt the terminology of MM. Milne-Edwards 

 and Jules Haime, and to name this species LitliopJiyllia affinis, 

 Duncan, 1867. 



The species formerly included in the genus Astrma, such as A. enclo- 

 tJiecata, A. cylindrica, &c., will be named Heliastrcea endotJiecata , 

 Duncan, Heliastrcea cylindrica, Duncan. Astrcea hrevis will become 

 Heliastrcea hrevis, Duncan. 



The genus Siderasircea is replaced by Astrcea, so that Sider- 

 astrcea grandis, nobis, will become Astrcea grandis, Dune. Sider- 

 asfrcea crenulata, Elainville, will be termed Astr(^a crenalata, Blain- 

 viUe, sp. 



8. Description of some new Sjoecies from Jamaica. — The Society's 

 Journals for 1863 and 1864 contain the descriptions of the species of 

 Corals from Jamaica. The following additions are requisite : — 



In the Eocene dark shales Faracyathus crassus, Ed. & Haime, 

 is found. Its European locality is Bracklesham. 



CoLUMNASTR^A Etrei, sp. uov. Plate I. figs, la, 15. 



The corallum is subramose, and the calices are wide apart and 

 oblique. The costae cover the coenenchymal surface, are equal, are 

 separated by deep grooves, and are usually straight and long. The 

 calicular margins are ridged by the costae. The septa are smaller 

 than the costse. The septa are deeply situate, are delicate, the 

 laminae being larger at the wall and near the columella than mid- 

 way ; and the primary septa have small pali. There are three cycles, 

 the last being incomplete in one or more systems. The secondary 

 septa nearly equal the primary when the cycle is complete. The 



* Ann. & Mag. Nat. Hist. ser. 3, vol. iv. 



VOL. XXIV. PART I. C 



