ODOSTOMIA. 363 



0. SIMPLEX, Angas. PI. 79, fig. 71. 



Rather solid, smooth, whitish ; whorls 7 J, rather flat, a little 

 angulatecl at the suture ; aperture 1 irate within, plait sharp, 



transverse. Length, 4 mill. 



Port Jackson, Australia. 

 0. STIUATA, Pease. PI. 79, fig. 73 



Subpellucid, whitish, spire sometimes stained yellowish or 

 brownish, finely spirally striated ; whorls 7, planely convex, 

 slightly angulate at the well-impressed suture ; fold distinct. 



Length, 5-5 mill. 



Paumotus. 

 0. POLITA, Pease. PI. 79, fig. 74. 



Smooth, glabrous, whitish or yellowish ; whorls 8, nearly 

 plane, suture slightly impressed; columella callous, fold well- 

 developed. Length, 6 mill. 



Tahiti. 

 0. RUBRA, Pease. PI. 79, fig. 75. 



Longitudinally striated, and indistinctly so spirally, light rose 

 color; whorls 9-10, plane, suture margined; columella slightly 



callous, fold small. Length, 10 mill. 



Paumotus. 

 0. ROSACEA, Pease. PI 79, fig. 76. 



Solid, smooth, shining, rosy, paler at the base; whorls 5, 

 plano-convex, suture obsoletely margined, with a row of obsolete 



light spots. Length, 7 mill. 



Paumotus. 

 0. GRACILIS, Pease. PI. 79, fig. 77. 



Thin, elongated, finely spirally striated ; whorls 6, flatly convex, 



acutely angulatecl at the suture. Length, 4 mill. 



Sandwich Is. 

 0. DEBILTS, Pease. PL 79, fig. 79. 



Rather thick, longitudinally striated, and very minutely so 

 spirally ; whorls 9, flat, acutely angulatecl at the suture, periphery 

 obtusely angulatecl ; white, spire rosy. Length, 9 mill. 



Rowland's Isl. 



Undetermined Species. 



0. OBTUSA, Gould. Bonin Islands. 



0. BULLULA, Gould. Loo Choo. 



