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 Meriting above alluded to. 
* Would it not be adviseable to adopt the Genus “ Velates,” proposed 
3>yMontfort ? for these two shells, since they differ in many respects from 
the otheT Neritinse ? 
t 
