224 PROCEEDINGS OF THE ACADEMY OP 



well impressed ; aperture sub-vertical, ovate, one-fourth the length 

 of the sliell ; peristome acute; columella fold small. 

 Length 4 mill. 



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

 A very delicate species of which we found seven examples in 

 beach sand. It is closely allied to 0. striata^ Pse., but ditiers in 

 its smaller size, and absence of the fine spiral strice. 



Odostomia deksestriata, Garr., pi. 3, fig. 44. 



Shell elongate, subulate, thin, pellucid, shining, white; spire 

 very long, graduallj- tapering, apex acute; whorls 11, flatly con- 

 vex, spirally striated with fine crowded raised lines, crossed by 

 more delicate lines of growth ; suture impressed ; aperture sub- 

 vertical, sub-ovate, nearly one-sixth the length of the shell ; peri- 

 stome thin, sinuous, slightly expanded at the base ; columella 

 thinly callous, slightly reflexed, and the plait rather small. 



Length 9 mill. 



Hah. Viti Isles. (Coll. Phil. Acad. Xat. Sciences.) 



An elegant species of which we found several examples on 

 weedy ground in the lower region of the littoral zone. It also 

 occurs at the Samoa Islands. The general aspect of the shell is 

 much like 0. debilis, Pse., which has a less number of whorls, and 

 differs in color. 



Odostomia oryza, Garr., pi. 3, fig. 45. 



Shell small, elongate-ovate, thin, smooth, gloss}", white ; spire 

 moderatel}^ elevated, convex in outline, apex obtuse; whorls T, 

 flatly convex ; suture faintly impressed, broadly margined be- 

 neath ; aperture acutely ovate, one-fourth the length of the shell ; 

 peristome simple; columella concave, slightly callous, and the plait 

 rather small. 



Length 3^ mill. 



Hab. Yiti Isles. (Coll. Garrett.) 



Only two specimens obtained from beach sand at Kiva Island. 



Odostomia sulcata, Garr., pi. 3, fig. 46. 



Shell rather solid, elongate, subulate, sub-pellucid, shining, 

 white ; spire verj' long, sides flattened in outline, base rimate ; 

 whorls 12? (apex fractured; whorls remaining 10) plain, the last 

 one short, rounded, all verticall}' grooved, grooves rather large, 

 closely set, concave, wider than their interstices, gradually dis- 



