ODOSTOMIA. 359 



0. VALLATA, 0. TENUIS, 0. SUBSULCATA, 0. MAMTLLATA, 0. LAM- 



ELLATA, of Carpenter. Mazatlan. 



0. AVELLANA, Carp. Vancoumr Id. 



Section Evalea, A. Ad., 1860. 

 0. TENUiscuLPTA, Carp. PI. 78, fig. 49. 



Whitish, thin, diaphanous ; whorls 3, besides the nucleus, 

 with impressed suture, with rather wide spiral sulcations, three 

 on the upper whorls and upper part of body-whorl, six subobso- 

 lete on the lower part of bod3--whorl ; tooth acute, small. 



Length, 2*5 mill. 



Neeah Bay. 



TJnfgured Species. 



O. iEQUiscuLPTA and 0. delicatula, Carp. Cape St. Lucas, L. Cal. 

 0. SUBLTRULATA, Carp. 3Iazatlan. 



Section Pyrgulina, A. Ad., 1863. 



Unfigured Species. 



P. ZIZIPHINA, P. PhOTIS, p. CONVEXA, P. LACUNATA, P. ARMATA 



and P. sCALARiFORMis, Carp. Mazatlan. 



P. NOTABiLis (Syns. P. turrita, C. B. Ad., P. quinquecincta, 



Carp.), and P. terebellum (Syn. P. exai^ata, Carp.), of C. 



B. Adams. Panama and Mazatlan. 



P. CLATHRATULA, C. B. Ad. Panama. 



lY. Polynesian Species. 



0. INTERSTRIATA, Souverbic. PI. 78, figs. 51, 50. 



Thin,subpellucid, somewhat glossy, cinereous ; whorls 7, longi- 

 tudinally ribbed, the interstices with close spiral striae; columella 

 with a stout fold. Length, 4 mill. 



New Caledonia^ Samoa and Viti Is. 



The last two localities are for 0. densecostata, Garrett (fig. 

 50), wliich that gentleman, in a letter to me, acknowledges to be 

 a synon3m. 



