VARIETIES OF NASSA. 29 
Corticata, A. Ad. P.Z.S., 1851, p. 98. Reeve, pl. 28, f. 189. 
New Zealand. 
Nearly smooth. 
tibbed and banded with brown. 
Body-whorl short, ribbed and noduled, brown, with a central 
white band ; young shells have a crenated operculum; in old 
ones it is spiny. - 
Sinusigera, A. Ad. P.Z.8., 1851, p. 100. Reeve, pl. 17, f. 113. 
Philippines. 
Shell larger, ribs more distant than the last, passing into small 
forms of N. costata, A. Ad. 
Semicostate. 
Nodules at the sutures very strong. 
In form very like the Cyllene lyrata, Lam. 
Strongly ribbed and transversely grooved. 
Callous of the columella spreading, showing an approach to 
the N. callosa, A. Ad. 
Ribs very close and numerous in front, the last or body-whorl 
has no groove below the suture. 
Callosa, A. Ad. P.Z.S., 1851, p. 98. Reeve, pl. 28, £. 185. 
Is a variety of N. sinusigera, A. Ad., with an extended 
callous. Philippines. 
Passing into the N. crenolirata, A. Ad. 
Noduled on the ribs, passing into the N. nodicostata, A. Ad. 
Nodules on the ribs much larger than the last, showing a re- 
lationship with the N. Gruneri, Reeve, (not Dunker!) 
Is intermediate between the N. Gruneri, Reeve, and N. 
sinusigera, A, Ad. 
Gruneri, Reeve, pl. 12, f. 75. Philippines. 
Intermediate between the last and N. crenolirata, A. Ad, 
Intermediate between N. crenolirata and N. corticata, A. Ad. 
Shell with four nodular keels, each nodule is white and is con- 
nected with its nearest neighbour by a fine brown line. 
Muricata, Quoy and Gaim. ‘Voy. del’ Astr.,” pl. 32, f. 32, 33. 
Columella granular. 
White, columella with three or four folds at the base. 
Columella smooth, expanded. Reeve, pl. 11, f. 73. 
New Ireland, &e. 
Intermediate between the last and N, horrida, D’k’r. 
