TRIFORIS. 179 



T. BILIX, Hinds. PI. 37, fig. 86. 



Outline a little convex on the sides, whorls 18, light colored, tri- 

 carinate, the lower carina larger, marbled, middle carina smallest. 



Length, 7 mill. 



Straits of Malacca. 



T. MAXILLARIS, Hinds. PI. 37, fig. 87. 



Roseate or light chocolate color, whorls 16-18, smooth, bisulcate, 

 the margins of the sulcations very minutely granular, as are those 

 of the sulcate suture. Length, 13 mill. 



Straits of Malacca. 



T. MICANS, Hinds. PI. 37, figs. 88, 89. 



Brownish, with 20-22 whorls, each with three series of whitish 

 granules, the lower series largest, the upper one smallest. 



Length, 14 mill. 



New Guinea. 



I think that T. alveolatus, Ad. and Reeve (fig. 89), from China 

 Sea is synonymous. 



T. VERRUCOSUS, Ad. and Reeve. PL 37, fig. 91. 



AVhorls 18-20, with three spiral series of transversely oblong, 

 strong tubercles ; whitish. Length, 8'5 mill. 



China Sea. 



T. HINDSI, Desh. PL 37, fig. 90. 



Light brownish, sides slightly convex ; whorls 12, with three sub- 

 equal spiral series of whitish granules. Length, 6 mill. 



Isle of Bourbon. 



T. FORMOSUS, Desh. PL 37, fig. 92. 



Light violaceous, sides a little convex ; whorls 15, flattened, with 

 channeled suture, each bearing a spiral row of whitish granulations 

 above and below. Length, 6 mill. 



Isle of Bourbon. 



T. ANGASI, Crosse. PL 37, fig. 93. 



Rather thin, brownish ; whorls 15, with three spiral series of 

 quadrate, flattened tubercles, the body whorl with four series, the 

 lower one bearing a white band ; aperture lirate with brown within. 



Length, 7 mill. 



Gulf of St. Vincent, N. Australia; N. Zealand. 



Cerithium minimum, Hutton, is a synonym. 



