128 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iob 



northern Norway. Inasmuch as no other specimens of P. verkruzeni 

 seem to exist and in view of the lack of conflict between the description 

 of P. verkruzeni and certain forms of P. kroyeri, it is possible that the 

 former is merely a smooth, slender form of P. kroyeri. 



Distribution: Burch (1945, No. 50, p. 16) gives the Pacific range 

 of P. kroyeri as Point Barrow to Vladivostok, Gulf of Peter the Great, 

 the Japan Sea, and the east coast of Siberia [and there are specimens 

 in the U. S. National Museum from British Columbia] ; and Thorson 

 (1944) gives the Atlantic range as PaiTy Island to Labrador, New- 

 foundland to Cape Cod, Greenland, Jan Mayen, and Spitzbergen. 



Genus Volutopsius Morch in Rink, 1857 



An orange-brown, thimble-shaped, empty capsule of some species 

 of Volutopsius washed ashore on Oct. 21, 1949. The capsule is 22 mm. 

 long by 21 mm. in diameter, large enough to belong to V. stefanssoni. 



Volutopsius stefanssoni Dall, 1919 



Plate 12, figure 7 



Volutopsius stefanssoni Dall, 1919c, p. 22, pi. 1; 1921, p. 89, pi. 9, fig. 2.— Oldroyd, 

 1927, pt. 1, p. 187, pi. 16, fig. 9; pi. 19, fig. 2. 



Two specimens were taken: one, a dead shell with 4.5 whorls, 

 including the nucleus, taken at a depth of 110 feet (Sept. 8, 1948), is 

 62 mm. high by 35 mm. in diameter (pi. 12, fig. 7); the other, a hve 

 specimen with 5.5 whorls, a brown throat and a white pillar, and 

 partially covered with a thin, medium-brown periostracum, taken at 

 Eluitkak Pass (40 feet, on Aug. 10, 1948), is about 75 mm. high by 

 about 42 mm. in diameter. 



Other material examined: 13 specimens from the Sea Horse 

 Islands, Plover Bay, near Nunivak Island, and near the Pribilofs. 



Discussion: Some of these shells have a much longer spire in 

 relation to the length of the aperture than do others. In some the 

 whorls are somewhat flat rather than inflated, and the shoulder is 

 rounded in some and almost angular in others. In some the "obscure 

 sweUings at the shoulder" are quite pronounced. One from near the 

 Pribilofs has a yellowish tan periostracum. 



Distribution: Point Barrow, the type locality, southward to the 

 57th parallel. 



