310 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 5G. 



Type-locality. — U. S. Fish Commission station. 3011, off Guaymas, 

 Mexico, in 71 fathoms, sand. 



VOLUTOPSIUS ROTUNDUS, new species. 



Shell large, slender, rather thin, with a distinct almost constricted 

 suture and more than five rounded whorls (the extreme apex defec- 

 tive) ; white or pinkish with a thin dehiscent pale straw-colored 

 periostracum; axial sculpture on the apical whorls of a few, irregular, 

 low plications, mostly with narrower interspaces; on the rest of the 

 shell only irregular incremental rugosities; spiral sculpture on the 

 last whorl behind the base, of half a dozen obscure low cords with 

 wider interspaces; on the base these cords number about 15, becom- 

 ing more regular and close anteriorly; the canal is still more finely 

 and closely threaded; aperture elongate, outer lip thin, body and 

 pillar erased; canal short and wide. Height of four whorls, 105; of 

 last whorl, 75; diameter, 40 mm. U. S. Nat. Mus. Cat. No. 206350. 



Type-locdliiy . — Kodiak Island, jVlaska; Fisher. 



This is also rather common in Cook's Inlet, and may prove to be 

 a Beringius. 



VOLUTOPSIUS FILOSUS. new species. 



Shell small, solid, fusiform, of a livid flesh color with grayish 

 white outer coat and dehiscent olivaceous periostracum and about 

 six whorls, the nucleus decorticated; suture distinct, rather deep; 

 sculpture of uniform fine fiattish threads, close-set, about two to a 

 millimeter, covering the whole surface, with axial sculpture of fine 

 inconspicuous incremental lines; whorls evenly rounded but not 

 inflated; aperture elongate, the outer lip thickened and slightly 

 reflected; the body and rather straight pillar thickly enameled; canal 

 short and wide, slightly recurved, with a feeble fasciole; the oper- 

 culum is brown, narrow, parallel-sided, with the nucleus at the right- 

 hand corner. Height of shell, 64; of last whorl, 52; diameter, 30 

 mm. U. S. Nat. Mus. Cat. No. 223055. 



Type-locality. — U. S. Fish Commission station 3283, off the 

 Khudubine Islands, Bering Sea, in 39 fathoms, sand; bottom tem- 

 perature, 40.3° F. 



VOLUTOPSIUS MIDDENDORFFH. new variety EMPHATICUS. 



Shell smaller than the average typical middendorffi, with the fine 

 spiral striae and threadlike incremental lines emphasized so as to 

 form a fine cloth-like reticulation on the surface. A female specimen 

 measures, height of shell, 92; of last whorl, 70; diameter, 50 mm. 

 U. S. Nat. Mus. Cat. No. 205368. 



Type-locality. — U. S. Bureau of Fisheries station 4982, in the 

 Japan Sea, in 390 fathoms, mud; bottom temperature, 32.7° F. 



