I46 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



ciole. Lon. of shell, $, 60; of last whorl, 40; of aperture, 29; 

 maximum diameter of shell, 35 mm. 



Deep water in Bering Sea ; type specimens from station 3502, near 

 the Pribiloff Islands, in 368 fathoms, mud ; bottom temperature, 

 37° F. U. S. Nat. Mus., 107,016. Operculum large, with sublateral 

 nucleus. 



A female specimen, still immature, measures 90 x 50 mm., and the 

 species extends south, in deep water, as far as the coast of Oregon. 



BUCCINUM ACUTISPIRATUM Dall, n. sp. 



Shell very thin, slender, acute, with a sharply constricted suture 

 and about eight evenly rounded whorls, covered with a very pale, 

 nearly smooth olivaceous periostracum ; surface with a few (on the 

 antepenultimate whorl 18) nearly straight axial wrinkles, most evi- 

 dent on the upper part of the spire, though not always present ; the 

 spiral sculpture is of fine, flat, more or less wavy, threads having 

 a tendency to pair, the intervals being feeble grooves, this sculpture, 

 as usual, a little stronger toward the canal ; aperture bluish white, 

 outer lip thin, slightly expanded ; body with a wash of callus ; pillar 

 rather long, arcuate, twisted, white, with a short, slightly recurved 

 wide canal and feeble fasciole ; operculum gray, with the nucleus 

 subcentral. Lon. of shell, 55; of last whorl, 38; of aperture, 26; 

 maximum diameter of shell, 26 mm. 



Station 4982, in the Sea of Japan, in 390 fathoms, September 19, 

 1906. U. S. Nat. Mus., 110,525. 



This belongs to the deep-water group of Buccina, which all have 

 certain characters in common and can be distinguished at a glance 

 from any shallow-water forms. The nucleus in the type specimen is 

 unusually well preserved, and is subglobular and somewhat swollen, 

 almost like that of some Chrysodonuis. 



BUCCINUM SURUGONUM Dall, n. sp. 



Shell solid, heavy, acute, white, covered with a dehiscent, thin, 

 polished periostracum, and with about seven rapidly increasing 

 whorls ; suture distinct, not appressed ; whorl in front of the suture 

 flattish, sloping to the shoulder and spirally sculptured with ( on 

 the last whorl about 12) sharp narrow, sometimes duplex revolving 

 threads, with wider interspaces between the sutures ; there is one 

 strong spiral at the shoulder and another at the periphery, with 

 three or four others less in size, and some still smaller intercalary 

 threads and fine spiral stria?, the latter most prevalent on the last 

 whorl ; axial sculpture of sharp, elevated, regularly spaced incre- 



