VARIETIES OF NASSA. 
Ribbed and cancellated, resembling the N. margaritifera, 
D’k’r. =dentifera, A. Ad. 
5 Is a very peculiar, short, broad form, with the callous covering 
the whole front of the body-whorl. 
Grain ribbed, coronated, callous defined. 
Banded with brown and white, with distinct varices. 
Elongated, the ribs are obliquely and gracefully curved. 
With irregular ribs closely packed behind the lip, then they 
become few and distant. 
Granules very small, leaving an open space below the sutures, 
similar to the N. margaritifera, D’k’r. 
Plicatella, A. Ad. P.Z.S., 1851, p. 111. Reeve, pl. 9, £. 56. 
2 Intermediate between the last and N. limata, Chem. 
Nivea, A. Ad. P.Z.S8.,, 18b1,-p. 118.--, Reeve, pl, 18, 4.0122 
Philippines. 
Serrata, Brocchi. Sub-App. Foss., pl. 5, f. 4. 
South European Seas. 
Costulata, Brocchi oa plyoyt a: 
Scalaris, A. Ad. P.Z.S., 1851, p. 108. Reeve, pl. 4, f. 21. 
Philippines. 
Is a smaller, narrower, and more elongated shell than the last. 
Ash-grey, with two dark bands, showing a close affinity with 
varieties of N. canaliculata, Lam. 
Having the ribs only slightly raised, resembling varieties of 
N. nodifera, Powis. 
Resembling the shell figured in Kiener at pl. 14, f. 49, asa 
variety of the N. crenulata, Brug. 
Canal almost closed, shell with two dark-brown bands. 
Intermediate between N. scalaris, A. Ad., and N. canaliculata, 
Lam. 
Variety deeply channelled at the suture, lip spiny; is very 
closely allied to the N, sequijorensis, A. Ad, 
Passing into the N. oriens, Marr. 
Elongated, spotted at the sutures, semicostate. 
S. Archer, Singapore. 
Varicifera, A. Ad. P.Z.S., 1851, pl. 108. Reeve, pl. 18, f. 118. 
Eastern Seas, 
