344 PROCEEDINOS OF THE NATIONAL MUSEUM. vol. 5G. 



Type-locality. — V. S. Fish Commission station 440S, off Catalina 

 Island, California, in 104 to IIS fathoms, sand. 



SEGUENZIA CERVOLA, new species. 



Shell small, white, slightly depressed, with one small, smooth nu- 

 clear whoii and five subsequent whorls flattened a little in front of a 

 distinct sutme, separated by a somewhat convex smooth fasciole 

 from a thread-like keel abo^ e the j^eriphery; in front of this is a wide, 

 smooth interval; on the base are about a dozen spiral threads with 

 wider interspaces, and very faint microscopic spiral striae are visible 

 in all the interspaces under a lens; on the upper whorls there is a 

 small thread betv\-een the keel and the suture, and near the apex they 

 become obsolete; at the aperture is a shallov/ sulcus between the keel 

 and the suture and a smaller one at the middle of the base; there is a 

 shar]) notch below the end of the thin, arcuate projecting ])illar, 

 behind which is a moderately large twisted umbilicus; the body shows 

 no glaze, the base of the shell is conspicuously convex; height, 4.5; 

 diameter, 5 mm. U. S. Nat. Mus. Cat. No. 209229. 



Type-locality. — I'. S. Fish Commission station 4.381, off North Coro- 

 nado Island, in 61S to 692 fathoms. 



SEGUENZIA CALIANA, new species. 



Shell small, v>-hite, elevated, trochiform, with a minute glassy 

 smooth nucleus and about five subsequent whorls; suture obscure, 

 laid on the peripheral keel; spiral sculp tm-e of, on the spire a single 

 sharp prominent keel somewhat behind the central line betvv'een the 

 sutm-es, and on the last whorl a similar peri})heral keel with a wide 

 excavated space on each side of it, the space behind the periphery 

 wider; base with seven rather close-set squarish cords, those nearer 

 the axis most adjacent to each other; axial sculpture of low thin 

 sharp lamellae with wider interspaces, over riding the peripheral keel 

 on the spire but not on the last whorl, prominent in the interspaces 

 behind the base, retractivel}' arcuate in the posterior interspace, and 

 protractively arcuate in the othei-s; they do not invade the someM^hat 

 fiattish base; apertm-e with a very deep sulcus next the sutm-e, the 

 outer lip in front of it much r^roduced, a feeble sulcus at the middle 

 of the base, in front of the arcuate pillar a smaller rounded indenta- 

 tion; behind the pillar a deep groove ending in a minutely perforate 

 umbilicus; body with no perceptible glaze; height of shell, 4. .5; diam- 

 eter, 3.2 mm. V. S. Nat. Mus. Cat. No. 207694. 



Type-locality. — XL S. Fish Commission station 2928, off San Diego, 

 California, in 417 fathoms sand and gravel; bottom temperatm-e, 41° 

 F. Also in more than 800 fathoms. 



7 CERITHIOPSIS SASSETTA, new species. 



Shell small, slender, wliite with a pale olive periostracum, with 

 more than seven whorls, the apex being eroded, the whorls moder- 



