42 



between this and Neritina Schmideliana ; Neritina 

 Altavillensis * has also been pointed out as very analo- 

 gous, but both these differ in those particulars, and also 

 in having an oblique apex. 



This Genus was pointed out by the Rev. George 

 Cookson, andhas been established by Mr. G. B.Sowerby, 

 in his Genera of Shells, where it is first described. It 

 is only known in a fossil state, among the organized re- 

 mains of a former Ocean, thus differing in situation from 

 the Neritinae above alluded to. 



♦Would it not be adviseable to adopt the Genus " Velates," proposed 

 byMontfort, for these two shells, since they differ in many respects from 

 the other Neritinae ? 



