GASTEROPODA. 147 
CerirHiumM apuNcuM (Gould). 
Testa soda, distorta, acuminato-conica, leviuscula, filis tenuibus cincta, 
luteo-cinerea, fusco-tincta : spira acuminata, anfractibus novem planis, 
sutura viz discretis, ultimo gibboso, valdé deflecto: apertura angusta, 
callosa, in canalem adscendentem producta ; labro crasso, simplici ; 
Sauce livida. 
Cerithium aduncum, Goutp; Proceed. Boston Soc. Nat. Hist., it. 
119. May 1849. Expedition Shells, 61. 
SHELL of medium size, solid, acutely conical, rounded at base, 
having a sort of flexure of the last whorl upon the others, so that the 
ventral face is rectilinear, while the dorsal aspect is strongly gibbous. 
The surface is nearly smooth and somewhat polished, having only 
delicate, crowded, raised, revolving threads; colour yellowish or ashy, 
tinted with dusky, somewhat arranged in dotted zones. Whorls 
nine, the upper ones nearly flat, scarcely distinguished by the suture, 
the last semi-globose, slightly undulated near the suture, and bearing a 
fold-like varix. Aperture small, with a prolonged, posterior canal and 
copious callus; siphonal notch small and contracted; outer lip thick, 
rounded, smooth, white, finely crenulated within ; fauces livid. 
Length one inch; breadth two-fifths of an inch. 
Inhabits Mindanao, Philippine Islands. 
This smooth, solid, dusky species is plainly marked by its pecu- 
liarly distorted form, the last whorl being so flexed upon the others 
that its ventral outline is straight, while the dorsal outline is re- 
markably arched. 
It is allied in colour and size to C. ocellatum, Lam. 
Figures 167, 167 a, 167 6, three views of the shell. 
