218 PROCEEDINGS OF THE ACADEMY OF 



chestnut-brown, about one-third the length of the shell ; canal 

 very short, wide and truncate; sinus large, deep, and rounded; 

 peristome sharp, arched, and slightl}'' sinuous near the base ; colu- 

 mella smooth, callous, and a wart-like callosity next the sinus. 

 Length 10 mill. 



Hab. Yiti Isles. (Coll. Phil. Acad. Xat. Sciences.) 

 An abundant species living on masses of dead coral in the lower 

 region of the littoral zone. It closely resembles D. vidua, Rve., 

 which we also collected both at the Yiti, and at Wallis Island, 

 and were invariably found on weedy ground, most generally buried 

 in sandy mud. Our species has the nodules on the body whorl 

 less acute, and vidua has the base of the shell more or less whitish 

 and there is always a row of granules on the lower half of this 

 body whorl. 



Drillia papillosa, Garr., pi. 2, fig. 29. 



Shell small, elongate-oblong, solid, spire moderately elevated, 

 yellowish-white ; whorls 8, convex, constricted beneath the suture, 

 spirally granulose ; granules rather large, three rows on the whorls 

 of the spire, the lower one obsolete; base contracted, spirally ridged 

 and produced into a short, obtuse, open canal ; aperture sub-ovate, 

 small, nearly a third the length of the shell ; posterior sinus large, 

 deep, and rounded ; peristome rather acute, slightly sinuous near 

 the base ; columella smooth, callous, nearly vertical. 



Length 6 mill. 



Hab. Yiti Isles. (Coll. Garrett.) 



Only a single but perfect example of this small species was 

 found. 



Drillia MiNUxissmA, Garr., pi. 2, fig. 30. 



Shell minute, elongate ovate, solid, spire rather short, light- 

 brown ; whorls G, spirally granulated, granules rather large, closeh' 

 set, disposed in two rows on the whorls of the spire, the lower one 

 the larger ; base contracted, spirally ridged ; aperture ovate, deep- 

 brown, one-third the length of the shell ; posterior sinus large, 

 circular, margins nearly united ; peristome rather sharp and 

 strongly arched; columella smooth, nearly vertical. 



Length 2 mill. 



Bab. Yiti Isles. (Coll. Garrett.) 



Two perfect specimens were found under clumps of coral on 

 reefs. 



