114 CERITHIID^. 



Has the general aiipearance of Tedarius, and I formerly referred 

 it to that group ; yet its anterior canal, and varicose lip remind one 

 of Cerithium. 



Subgenus Vertagus, Klein, 1753. 



Canal long and strongly recuryed, columella with an oblique 

 median plication. 



Rhinoclavis, Swainson, 1840, is a synonym. 



Subgenus Campanile, Bayle, 1884. 



Shell yery large ; columella simple, or with plications throughout 

 its length ; aperture short ; lip sinuous, oblique ; canal strongly 

 twisted. 



C. L^VE, Quoy and Gaim. is a typical liying example of this 

 group ; which appeared in the upper Cretaceous and flourished 

 during the Eocene jDcriod. 



Subgenus Bezanconia, Bayle, 1884. 



Suture strongly channeled, periphery continuous and detached. 

 C. SPIRATUM, Lam. Eocene of Paris basin. 



Subgenus Bellardia, Mayer, 1870. 

 Last whorl Avith a series of tubercles, separated by a narrow, par- 

 tially closed transverse fissure. Fossil. C. Janus, Mayer. Num- 

 mulite of Vincentin. 



Subgenus Cerithinella, Gemmellaro. 1878. 

 Subperforate, very long, cylindrical or turreted, plicate, and 

 spirally lined, growth lines recuryed near the suture ; aperture 

 quadrangular with a very short canal, columella straight. Haying 

 the aspect of iVermcea. C. Italic A, Gemm. Jurassic of Sicily. 



Subgenus Pseudocerithium, Cossmann, 1884. 



Shell elongated, narrow, multispiral, with axial ridges forming a 

 sort of pyramid twisted on its axis ; aperture entire, slightly twisted 

 in front. 



C. contortum, Deslongchamps. Jurassic of Normandy. 



Subgenus Tomochilus, Gemmellaro, 1879. 



Subumbilicated, short, pupoid-conic, whorls cancellated ; aper- 

 ture rounded, olilique, channeled behind, dilated anteriorly, colu- 

 mella thick, forming a slight depression at the base. 



C. Deslongchampsi, Gemm. Jurassic of Sicily. 



