98 



DEFRANCIINiE. 



Genus CYTHARA, Schumacher. 



Margin of mantle sh'ghtly dilated on the right side. 



Shell fusiform, smooth, longitudinally plicated or rihbed ; 

 aperture linear, posteriorly subemarginate; canal very short, 

 nearly straight ; columella subflexuous, transversely stri- 

 ated ; inner lip posteriorly callous ; outer lip margined, 

 denticulate, or striated internally. 



8yn. Mangel ia (part), Reeve. 



Ex. 0. marginelloides, Reeve, pi. 10, fig. 9. Shell, 0. 

 citharella, Lamarck., fig. 9, a. 



This genus, usually confounded with Mangelia, in the 

 slight dilatation of the mantle margin, in the short spire, 

 and in the corrugated inner and thickened outer lips, some- 

 what resembles Morum among the Cassidida : the species 

 are all rather small, but numerous. 



Species of Cythara. 



abyssicola. Reeve. 

 angulala, Reeve. 

 Antillarum, Reeve. 

 astricta, Reeve. 

 balteata, Reeve. 

 bicolor, Reeve. 

 capillacea, Reeve. 

 castanea, Reeve. 

 cavernosa, Reeve. 

 Celebensis, Hinds. 

 cincta, Reeve. 

 cinnamomea, Reeve. 

 citharella, Lam. 

 columbelloides, Reeve. 

 corniformis, Gray. 



conohelicoides, Reeve. 

 coronata, Reeve. 

 crassilabrum, Reeve. 

 cylindrica. Reeve. 

 derelicta, Reeve. 

 digitalis. Reeve. 

 Dyson i, Reeve. 

 elegans, Reeve. 

 fasciata, Reeve. 

 funebris. Reeve. 

 funiculata. Reeve. 

 fusiformis, Reeve. 

 gibbosa, Reeve. 

 Goodallii, Gray. 

 gracilis, Reeve. 



