MARINE MOLLUSKS — MACGINITIE 95 



Discussion: This is the shell that has commonly been called V. 

 zonata Gould by West Coast workers. The 2 specimens from 453 feet 

 are typical forms; the one from 217 feet is probably var, zonata Gould. 

 In typical V. undata the inner lip is broader and more excavated than 

 in var. zonata and the outer lip is expanded and extends above the 

 spire; in var. zonata the outer lip is not expanded and does not rise 

 beyond the apex. In the Point Barrow specimens the calcified inner 

 layer varies from chalk}^ white to bluish white and the cuticulum 

 varies from a dull tan to pale brown. 



Distribution: Circumpolar; Siberian, Russian, Norwegian, Cana- 

 dian, and Alaskan Arctic ; Scotland, the Faroes, Iceland, Greenland, 

 south to Maine; Point Barrow south to the Kudobin Islands. A 

 questionable record from oMonterey Bay. It is new to Point Barrow. 



Velutina velutina (Miiller, 1776) 

 And var. schneideri Friele 



Plate 6, figukes 4, 5 



Bulla velutina MuUer, 1776, p. 242. 



Velutina laevigata G. Sars, 1878, p. 146.— Oldroyd, 1927, pt, 3, p. 140, pi. 92, 



fig. 8.— Abbott, 1954, p. 175, pi. 22n. 

 Velutina schneideri Friele, 1886, p. 26, pi. 11, figs. 3, 4. 

 Velutina velutina Odhner, 1913, pp. 11, 60, pi. 1, figs. 17-26; pi. 5, figs. 22, 24. 



Possibly 4 specimens were collected: 1 (8 mm.) from 453 feet; 1 

 (14.5 mm.) from 741 feet; and 2 small, living specimens (4 mm. and 

 2.75 mm.) from 453 feet and 420 feet, respectively, probably belong 

 to this species. 



Other material examined: About 100 specimens from Norway, 

 Spitzbergen, Shetland, Scotland, and Greenland; about 25 from 

 localities from Newfoundland to Massachusetts; about 15 from 

 localities from Icy Cape to Kodiak Island, and Puget Sound. 



Discussion: This is the species commonly referred to as V. laevigata 

 Linnaeus by West Coast workers. The Point Barrow specimens are 

 white within and have a thin, horn-colored periostracum. The 

 largest specimen, from 741 feet, has a smoother periostracum, char- 

 acteristic of the var. schneideri Friele, 1886. The 8-mm. specimen 

 from 453 feet is a typical V. velutina, in which the longitudinal 

 ridges of the periostracum are distinct (see Odhner, 1913, pi. 1, figs. 

 17-23, 26; pi. 5, figs. 22, 24). In var. schneideri the calcareous layer 

 is thin and the longitudinal cuticular ridges are indistinct or absent 

 (see Odhner, 1913, pi. 1, figs. 24, 25; pi. 5, fig. 23). 



This species has been reported from Monterey Ba}^ and the coast 

 of California. The California specimens that I examined are con- 

 sistently small; they are higher and flare less than V. velutina; the 

 striae of the periostracum are closer than in V. velutina and these 



