184 TRIFORIS. 



T. CARTERETENSIS, Hinds. PL 38. fig. 22. 



Whorls 14, triseriately granular, silicate between the series, mid- 

 dle series small ; yellowish white. Length, 6'4 mill. 



Port Carteret, New Ireland. 



T. CRENULATUS, Desh. PL 38, fig. 29. 



Whorls 14, triseriately ridged, the lower ridge granular ; yellow- 

 ish white, with oblong, subquadrangular chestnut stripes. 



Length, 9 mill. 



Isle of Bourbon. 



This is said to be a doubtful synonym of T. cemulans, Hinds 

 (unfigured). 



T. TASMANICA, Tenison Woods. PL 38, fig. 31. 



Whorls about 12, yellowish, triseriately granular, the lower row 

 chestnut-spotted between the granules, suture deeply channeled, 

 body whorl with several ridges, without tubercles, on the base. 



Length, 6 mill. 



Tasmania. 



T. CONCINNUS, Hinds. PL 38, fig. 23. 



Whorls 11, triseriately granular, middle series small; yellowish 

 brown, the lower series of granules black or brown, body whorl with 

 five series of granules and two bands. Length, 6 mill. 



Pacific Ocean (Hinds). 



A specimen in the collection of the Academy at Philadelphia is 

 labelled " Honduras ". 



T. PUP^EFORMIS, Desh. PL 38, fig. 26. 



Whorls 12, suture scarcely distinctly channeled, biseriately 

 granose, the granules lighter colored on a purplish ground, base 

 bisulcate. Length, 4 mill. 



Isle of Bourbon. 



T. ATOMUS, Issel. PL 38, figs. 33, 32. 



Similar to the above in form, ornamentation and color, but with 

 three rows of basal granules, instead of the two sulci ; whorls 6. 



Length, 1'5-2'Q mill. 



Bed Sea, Mauritius. 



Very likely this will prove synonymous with T. pupceformis. 

 The last locality is for T. crassula, Martens (fig. 32). 



