MARINE MOLLUSKS — MACGINITIE 97 



Newfoundland; Point Barrow south to the Pribilofs and the Aleutians. 

 It has not been reported previously from Arctic Alaska. 



Velutina lanigera Moller, 1842 



Plate 6, figure 7 



Velutinn coriacea of authors (in part) (not Helix coriacea Pallas, 1788). 

 Velutina lanigera Moller, 1842a, p. 10; 1842b, p. 83.— G. Sars, 1878, p. 146, pi. 

 12, figs. 3a-b.— Odhner, 1913, pp. 11, 65, pi. 1, figs. 27-29. 



One empty shell, over 31 mm, long, was washed ashore on Sept. 

 12, 1949. 



Other material examined: One specimen from Bering Sea; sev- 

 eral from Petrel Bank, Bering Sea; several from Cape Lisburne; and 

 others. 



Discussion: This species has been confused with V. plicatilis (= 

 V. coriacea and V. sitkensis) and other species. The earliest whorls 

 of V. lanigera are broader and more inflated than those of V. velutina, 

 and in shells of the same size V. velutina has about one half more 

 whorl than V. lanigera. The calcified layer is more reduced in V. 

 lanigera than in V. undata. The entire shell is longer than that of 

 V. plicatilis, it has a much larger spire, and the periostracum is 

 thicker. 



Distribution: Northern and southern Norway, Spitzbergen, Ice- 

 land, western Greenland; Point Barrow south to Petrel Bank, Bering 

 Sea. Careful study of specimens in the U. S. National Museum may 

 extend the range farther south. This species has not been reported 

 previously from North America. 



Suborder Rachiglossa 



Family MURICIDAE 



Genus Boreotrophon Fischer, 1884 



The northern species of this genus are in need of a thorough study 

 and revision. Gould (1870, p. 377-78) describes Trophon clathratus 

 as a small, brownish, ventricose shell with 6 whorls and from 15 to 

 20 sharp varices. He considers this shell the same as Trophon 

 hamffius of English authors. He describes Trophon scalariformis as a 

 fusiform, white or reddish brown shell with 7 whorls and from 15 to 

 20 flexuous varices with jagged edges, usually more elevated at the 

 posterior part of the whorls so as to produce an angular appearance. 

 Bartsch (1921, p. 87) states that the European form is T. clathratus 

 and the western Atlantic members are T. scalariformis. After exam- 

 ining some Point Barrow specimens identical with our western At- 

 lantic Boreotrophon scalariformis, Dr. Guimar Thorson informed me 



