60 



PEOF. P. MAETIN DUNCAN's EEVISION OE THE 



an elongate columella. It is from the Lower Tertiaries and Oli- 

 gocene of Europe. It requires further study. It merits the 

 position of a subgenus. 



Subgenera : — Leptaxis^ Eeuss ; AntilUa, Duncan. 



Subgenus Antillia, Duncan, Quart. Journ. Geol. Soc. 1863, 

 vol. xix. p. 28. 



Syn. Cyathopliyllia, E. de From. ; SmilopJiyllia, E. de Erom. ; 

 Syzygophyllia, Eeuss ; ILomoj^liyllia, Briigg. 



Corallum simple, variable in shape, with more or less dentate 

 and lobed, or simply dentate or simply lobed septa. A well- 

 developed columella. Costse variously granulated, tuberculated 

 or crested. Endotheca developed ; sometimes some exotheca 

 between the costse. Epitheca strong, folded, and reaching to 

 various heights. 



Distribution. — Fossil, Jurassic : England and Europe. Eocene : 

 Euro]3e, Asia. Miocene : "West Indies, Asia. — Becent. Caribbean 

 Sea, Indian Ocean, Hed Sea, Japanese seas, N. Australia. 



This subgenus has a well-marked facies which separates it from 

 typical Circopliylliw. 



M. de Eromentel mistakes my definition of AntilUa (' Pal. 

 Eranc, Terr, cret.' tom. viii. livr. 24, p. 293), and gives AntilUa a 

 lamellar columella. Having established Smilophyllia for Litho- 

 phylliacese with lamellar columellse, he withdraws it into AntilUa. 

 This is an error. In no pi ace have I given AntilUa a lamellar colu- 

 mella ; it has nothing of the kind. The genus SmilopJiyllia must 

 therefore lapse in the subgenus AntilUa, Duncan*. M. de Ero- 

 mentel's genus CyatliopJiyllia is the same as AntilUa, y^hich. has the 

 preference from age. The first-named genus lapses therefore. 



SyzygopTiyllia, a genus established by Eeuss, is the same thing 

 as AntilUa, and must be absorbed. Zittel unfortunately has not 

 seen the original diagnosis of AntilUa, and has abstracted from 

 M. de Eromentel's translation. 



The free or attached condition of corals having the other 

 specific or generic characters in common is not sufficient to esta> 

 blish a distinction. The genus Caryophyllia has free and 

 adherent species ; and the species Caryophyllia clavus has free, 

 pedunculate, and broad-based and adherent individuals. Hence 



* Zittel, ' Handb. Palseont.' p. 650, mentions Smilophyllia, Fromentel, as a 

 synonym of AntilUa. 



