VARIETIES OF NASSA. 45 
Smooth, costate, passing into the N. crassicostata, Marr. 
Crassicostata, Marr. (See description, not the Pamphlet, p. 6). 
Bombay. 
Smaller and more oblong than the last ; is closely allied to the 
N. costata, A. Ad. 
Costata, A. Ad. P.Z.S., 1851, p. 98. Reeve, pl. 21, f, 142. 
Philippines. 
A variety resembling the N. nodicostata, A. Ad., but with 
smooth ribs, 
Obesa, Neville. Jour. Asiat. Soc., p. 95, pl. 8, f. 2, 3. Bombay. 
var. Ceylonica. Ceylon and Penang. 
Similar to the last in form, but having the ribs carried to the 
base. 8. Archer, Singapore. 
Bifaria, Baird. “Cruise of the Curacoa” (Brenchly), 1873, p. 436, 
pit 38, B15. 2: Andaman Islands. 
With longer ribs, showing a variation towards the N. pauperata, 
Lam. 
2 Bella, Marr. Pamphlet, p. 9, has the ribs granular. 
With a broad, button-like callous in front. N. precallosa, 
Marr. Pamphlet, p. 11. 
Concentrica, Marr. (as concinna, Powis). Reeve, pl. 13, f. 82. 
Philippines. 
Wilsoni, Reeve, pl. 24, f. 158. (Not C. B. Adams.) The 
N. Wilsoni, C, B. Ad., is a variety of the N. complanata, 
Powis. 
Between the N. concinna, Powis, and the next. 
7 Smithi, Marr. Quart. Jour. Conch., Leeds, p. 187. Pamphlet, 
p. 7. 
568 Between N. cribraria and concentrica, Marr. 
or Or Sr Sr or 
Noa 7 
oOo Ww = © 
Cribraria, Marr. Pamphlet, p. 12. 
Abyssinica, Marr. A pas: Abyssinia. 
Grata, Marr. (See description). 
Larger and broader than the shell described. 
Taller and narrower than the last, whorls granular. 
Small, reddish-brown, with a central, pale band. 
Taller and narrower than the last, with the reticulation very fine. 
Arcularia, Linn. Reeve, pl. 4, f. 250. Philippines. 
White, glossy, body-whorl smooth in the centre, ribbed on each 
side, 
