60 PEOF. P. MAETIN DUNCAN S EEVISION OP 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 ; Antillia, Duncan, 



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

 vol. xix. p. 28. 



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

 Syzygopliyllia, Heuss ; Homophyllia, 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 costaj. Epitheca strong, folded, and reaching to 

 various heights. 



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

 Europe, Asia. Miocene : "West Indies, Asia. — Hecent. Caribbean 

 Sea, Indian Ocean, Eed Sea, Japanese seas, IS". Australia. 



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

 typical CircophylUcB. 



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

 Eranc, Terr, cret.' torn. viii. livr. 24, p. 293), and gives Antillia a 

 lamellar columella. Having established Smilophyllia for Litho- 

 phylliacese with lamellar columellse, he withdraws it into Antillia. 

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

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

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

 mentel's genus CyatJiopliylUa is the same as Antillia, y^hich has the 

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



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

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

 seen the original diagnosis of Antillia, 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 Garyophyllia has free and 

 adherent species ; and the species Oaryophyllia clavus has free, 

 pedunculate, and broad-based and adherent individuals. Hence 



* Zittel, ' Handb. Palceont,' p. 650, mentions Smilo^hi/Uia, Fromentel, as a 

 synonym of Antillia. 



