222 PROCEEDINGS OF THE ACADEMY OP 



Avliite, smooth, normal five, rounded, longitudinally ribbed ; ribs 

 large, rounded, wider than their interstices, ten on tiie body whorl, 

 crossed by small revolving ridges, which form transverse nodules 

 in mounting over the ribs ; aperture elongate, linear, slightly 

 flexuous, about half the length of the shell ; posterior sinus large, 

 rounded; peristome thick, finely crenulate, slightly involute, the 

 inner margins with 5-6 closelj'-set teeth ; columella smooth. 



Length 4 mill. 



Hah. Samoa and Yiti Isles. (Coll. Garrett.) 



A very rare species, of which we obtained a single example at 

 each of the two above localities. 



Clathurella pdnctifera, Garr., pi. 2, fig. 39. 



Shell small, elongate-oblong, thick, base contracted, spire long, 

 acute, sides convex, cinereous, dotted with light-brown, tlie dots 

 disposed in regular series on the ribs ; nuclear whorls 3, light- 

 brown, obliquely plicate-striated ; normal whorls 5-6, flatly convex, 

 longitndinally ribbed, ribs small, rounded, narrower than their 

 interstices, 10-11 on the body whorl, crossed by smaller transverse 

 ridges, four on the penultimate whorl ; aperture oblong, narrow, 

 a little more than a third the length of the shell ; posterior sinus 

 ratiier large, semicircular; peristome externally varicose, slightly 

 involute, crennlate, and the inner margin with six teeth ; columella 

 smooth, callous. 



Length 5 mill. 



Hah. Society, Samoa, and Yiti Isles. (Coll. Garrett.) 



We obtained a few examples of this species on the outer reefs. 

 It belongs to the same group as C. pumila, violacea, and felin a, 

 which some of the European conchologists refer to the sub-genus 

 Crassispira^ of the genus Drillia. 



CiTHARA MELANOSTOMA, Garr. , pi. 2, fig. 40. 



Shell elongate-oblong, rather solid, base contracted, cinereous or 

 whitish, with a brown-black columella, and most generally with a 

 transverse row of linear dots between the ribs on the bod3'-whoil ; 

 spire long, turreted, sub-acute; whorls 5-6, obliquel>- tabulate 

 above, prominent at the angle, longitudinally ribbed ; ril)s large, 

 remote, compressed, descending from the suture, 5-6 on the body 

 whorl, intersi)aces concave, smooth ; aperture elongate-oblong, 

 nearly a third the length of the shell ; base produced into a short, 

 open, truncate canal, and the posterior sinus large, deep, semi-cir- 



