CASSIDID^E. 269 



reflected, plicate ; coluinella obliquely plicate. C. saburon, 

 Adanson. 



Caxsidea, Swains., is reiiTred to this group. 



Section 1. SEMICASSIS (xcnxtt stricto). 



Section II. BEZOARDICA., Schum.. 1817. 



Shell varicose, angular behind, oval, with moderate spire ; 

 outer lip often spinously dentated in front. C. glauca, Linn. 

 Phalium, Link, is another name for this section. 



Section I IT. CASMARIA, H. and A. Adams, 1853. 



Shell smooth or longitudinally subplicate, spire moderate ; 

 inner lip smooth, callous; outer lip margined, smooth or slightly 

 crenulated on the inner edge. C. pyrum, Lam. 



Genus CASSIDARIA, Lam., 1812. 



Shell nodulous, not varicose, ovate or oval-oblong, somewhat 

 attenuated in front to a moderate, reflected, subascending canal; 

 inner lip more or less spread over the body-whorl, tuberculated 

 or plicate, outer lip reflected, ribbed, plicate within. Operculum 

 corneous, the apex median and marginal, outer edge sinuous. 



Animal similar to Cassis. 



The few species are Mediterranean and West Indian. The 

 genus appeared in the cretaceous period, and reached its maxi- 

 mum in the tertiary. Murio, Montfort, 1810; Echiriora, Schum., 

 1817 ; Galeodaria, Conrad, 1865, and Galeodea, Link, 1807, are 

 synonyms. C. echinophora, Linn. 



Subgenus SCONSIA, Gray, 1847. 



Shell oval-fusiform, with revolving stride, and a single longi- 

 tudinal varix opposite the aperture; aperture long, canal short 

 and slightly reflected ; inner lip regularly plicate ; outer lip 

 rather thick, subreflected. plicate within. Animal and operculum 

 unknown. A single recent, and some cretaceous and tertiary 

 species. C. striata, Lam. 



Genus ONISCIA, Sowerby, 1824. 



Shell cylindrical, with short, conical spire and canal reflected 

 at the base, surface tuberculated, mouth linear, lip reflected, 

 thickened and plicate within, columella plicate. 



These little shells are known by their transversely ribbed 



