NATURAL SCIENCES OF PHILADELPHIA. 229 



rapidly than the lower, apex acute, base slightly produced ; whorls 

 9, convex, the last one rounded, under the lens minutely striated 

 by lines of growth and very fine close revolving impressed lines ; 

 suture deeply impressed and margined beneath ; aperture slightly 

 oblique, rhomboid-luniform, about one-third the length of the shell ; 

 peristome rather thin, straight ; columella slightly callous, with 

 two oblique plaits. 

 Length 10 mill. 



Hab. Paumotus and Society Isles. (Coll. Garrett.) 

 A very rare species of which we found a single example at each 

 of the above-mentioned locations. 



Nassa anthracina, Garr., pi. 3, fig. 57. 



Shell small, oblong-ovate, solid, shining, black or deep blackish- 

 brown, with a transverse light-brown line on the upper lialf of the 

 body whorl ; spire rather long, apex sub-acute ; whorls embryonal 

 3, smooth, amber color, normal whorls 4-5, convex, with fine 

 revolving impressed lines ; aperture sub-oval, little more than one- 

 third the length of the shell; peristome rather thick, straight, 

 externally varicose, inner margin with 5-6 oblong teeth ; columella 

 arched, callous, with a smajl oblique plait next to the basal 

 sinus ; parietal region with a small ridge. 



Length t mill. 



Hah. Yiti Isles. (Coll. Garrett.) 



We found only two examples of this species, both obtained on 

 weedy bottom near low-w^ater mark. The pale line is most con- 

 spicuous in the aperture. 







Daphnella FUSiFORMis, Garr., pi. 3, fig. 58. 



Shell oblong, fusiform, rather solid, white, faintly tinged with 

 yellowish-brown ; spire acutel}' conical, half the length of the 

 shell; whorls embryonal 3, rugose, brownish-horn color; normal 

 whorls 6, convexly angular, last one very large, swollen, much 

 contracted and produced at the base; longitudinally ribbed, ribs 

 small, closely set, rounded, becoming obsolete on the body whorl, 

 which latter exhibits several periodical varices ; whole surface 

 with numerous small unequal-sized, more or less crenulate revolv- 

 ing ridges ; aperture ellipticall}^ oval, half the length of the shell ; 

 peristome thick, finely crenulate, arched, sinus small; columella 

 smooth and polished. 



Length 8 mill. 



