NO. 2295. NEW NORTH PACIFIC MOLLUSKS—DALL. 321 



AULACOFUSUS (LIMATOFUSUS) TROMBINUS, new species. 



Shell small, short, rotund, with about five whorls, the apex 

 eroded, white with a pale olivaceous dull })eriostracum : suture 

 distinct, not appressed; axial sculpture of fine, regular, almost 

 microscopic, incremental lines crossing the outer sculpture but hardly 

 visible except with a lens; spiral sculpture of (on the penultimate 

 whorl about 10, on the last whorl about 25) narrow, almost channeled 

 grooves, with slightly rounded broader interspaces, sometimes 

 divided by a smaller groove, and feebler near the suture and on the 

 canal; outer lip thin, sharp, arcuate; inner lip erased, pillar white, 

 short, twisted; canal short, wide, distinctly recurved; operculum 

 normal, rather short and wide, in harmony with the aperture; height 

 of shell 16; of last whorl, 14; of aperture, 11; diameter, 10 mm 

 U. S. Nat. Mus. Cat. No. 213332. 



Type-localifij. — U. S. Fish Commission station 3253, in Bering Sea, 

 off the Pribiloff Islands in 36 fathoms; bottom temperature, 35° F. 



COLUS (LATISIPHO) ERRONES, new species. 



Shell of moderate size, dark reddish bro\vn, acute, with six rapidly 

 increasing moderately convex whorls and a glassy subglobular smooth 

 nucleus of about one whorl; sutuie distinct, not appressed; perio- 

 stracum polished; axial sculpture of faint incremental lines; spiral 

 sculpture of the early whorls of nmneious fine striae, covering the 

 whole surface with wider flat interspaces; this sculpture continues, 

 becoming less and less evident until except under a lens the sm^face 

 appears to be smooth except on the canal; aperture semilunate, outer 

 lip thin, simple, sigmoidly arcuate; tliroat whitish, body with a thin 

 callus, pillar straight, attenuated in front; canal short, wide, strongly 

 recurved; height of shell, 47; of last whorl, 32; of apertm-e, 23; 

 diameter, 22 mm. U. S. Nat. Mus. Cat. No. 226227. 



Type-locality. — Bering Sea, U. S. Fish Commission. 



COLUS (LATISIPHO) CLEMENTINIIS, new species. 



Shell small, w^hite, with a gieenish olive periostracum, and 

 more than five rounded whorls, the apex decorticated; suture dis- 

 tinct, not appressed; axial sculpture of u-regulaily promment uicre- 

 mental lines; sphal sculpture of a tew UTegular interrupted spiral 

 thi-eads, probably accidental, and some feeble grooves near the canal; 

 surface practically smooth, almost polished; apertm-e semilunate, the 

 outer lip thin, arcuate, body with a coat of white enamel, the pillar 

 white, short, twisted, attenuate in front; canal wide, short, slightly 

 recm-ved; height of shell, 21; of last whorl, 15; of apertme, 11; 

 diameter, 10 mm. U. S. Cat. Mas. Cat. No. 208912. 

 115690— 19— Proc.N.M.v()1.56 21 



