NO. 2295. NEW NORTH PACIFIC MOLLVSKS—DALL. 813 



ANCISTROLEPIS CALIFORNICUS, new .species. 



Shell of moderate size, solid, white, with an olivaceous periostra- 

 cum, with about seven whorls, excluding the (defective) nucleus, 

 with the sutural channel almost obliterated; apical whorls with two, 

 later whorls with three strong but not sharp carinae, revolving 

 nearl}^ equidistant between the sutures, the posterior carina slightly 

 smaller than the others; on the base are about half a dozen similar 

 carinae beside the small spiral threads on the canal; other spiral 

 sculpture of minute striae and threads pretty uniform over the 

 surface, with an occasional stronger intercalary tluread; axial sculp- 

 ture of faint irregular incremental lines on which the periostracum 

 is sometimes raised; aperture v/hite, internally reflecting the stronger 

 sculpture; outer lip thin, not reflected, body erased, pillar short, 

 strong, sharply twisted, with a short wide canal. Height of shell, 

 46; of last whorl, 33; diameter, 30 mm. U. S. Nat. Mus. Cat. No. 

 122667. 



Type-locality. — U. S. Fish Commission station 2919, in 984 fathoms, 

 mud, near the Cortez bank oft' the coast of southern California. 



This is a larger and more conic shell than A. eucosmius and has 

 fewer keels. 



ANCISTROLEPIS BERINGIANUS, new species. 



Shell large, solid, livid whitish, with a long acute spire, the apex 

 defective, but the shell had more than six whorls, separated by a 

 very narrow deep suture and covered by a very thin pale oUvaceous 

 periostracum; whorls well rounded, with four or five nearly obsolete 

 flattish spiral ridges between the base and the shoulder, with wider 

 interspaces, the base delimited by a stronger cord, in front of which 

 are eight or ten similar flattish spirals more closely set. There is 

 also a very minute scratchy spiral striation; axial sculpture only of 

 rather rude incremental lines; aperture short and wide, the outer 

 lip thin, not expanded, the body erased, the pillar short, white, 

 twisted, the axis not quite pervious, and with a feeble fasciole. 

 Height of five whorls, 98; of last whorl, 66; of aperture and short 

 wide canal, 51; diameter, 52 mm. U. S. Nat. Mus. Cat. No. 205401. 



Type-locality. — U. S. Bm-eau of Fisheries station 4794, in western 

 Bering Sea, off Starichkoff Island, in 58 fathoms, gravel. 



ANCISTROLEPIS TROCHOIDEUS Dall. 



Shell small, short, wide, white, with about five whorls, the nucleus 

 eroded, white, with a pale olive, minutely laminate periostracum; 

 upper whorls with two later with four angular keels, with smaller 

 intercalary cords, the base with seven strong rounded cords with 

 equal interspaces; axial sculpture of fine incremental lines on which 

 at regular intervals the periostracum is laminar; aperture wide, 



