80 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io» 



Margaritopsis ? grosvenori (Dall, 1926) 



Plate 2, figure 12; Plate 4, figures 4, 5; Plate 8, figure 2 

 Margarites grosvenori Dall, 1926, p. 59. 



One live specimen (3.1 mm. in diameter) was taken at 152 feet, 1 

 dead shell (3.5 high by 3.6 mm. in diameter) at 175 feet, and a broken 

 shell at 216 feet. 



Other material examined: The types, consisting of 2 large broken 

 shells from northwest Greenland, 1 medium specimen from Ungsuak, 

 Greenland, and 4 large ones and 1 juvenile from Cabourg Island, 

 Baffin Bay. 



Discussion: The specimens from northwest Greenland have finer 

 striae than the ones from Point Barrow (pi. 8, fig. 2), and the ones from 

 Cabourg Island have still finer spiral striae, but the specimen from 

 Ungsuak has striae as coarse as those from Point Barrow. 



In his original description Dall speaks of "the inner lip nearly cover- 

 ing a narrow umbilical opening." Actually, the umbilical opening in 

 the types is at least moderately open and although the inner lip does 

 overhang the opening to a certain extent, it is so high above the open- 

 ing that the "covering" effect is not pronounced (pi. 4, fig. 5). This 

 characteristic applies to all the specimens I have seen. The Point 

 Barrow specimens are limy in appearance rather than "translucent 

 pearly white," but this is a common variation in Point Barrow shells, 

 especially in dead specimens. 



This species was described as a Margarites but, because it has spiral 

 sculpture and lacks axial sculpture and is without a spiral cord out- 

 lining the umbilicus, I have, with reservations, placed it in Mar- 

 garitopsis. The peritreme is entire. 



Distribution: The Point Barrow specimens extend the range of 

 this species from Greenland and Baffin Bay westward to Arctic Alaska 

 and the Pacific area of the Arctic. 



Genus Solariella Wood, 1842 

 Solariella obscura (Couthouy, 1838) 



Plate 1, figure 9; Plate 2, figure 11 



Turbo ohscurus Couthouy, 1838, p. 100, pi. 3, fig. 12. 



Solariella obscura Odhner, 1912, pp. 18, 70, pi. 5, fig. 22; pi. 7, figs. 9-20.— Dall, 

 1921, p. 178, pi. 18, figs. 11, 12.— Abbott, 1954, p. 110, figs.^Slf-g. 



One living adult and 5 young and juvenile specimens were collected: 

 1 (6.6 high by 7.6 mm. wide) at 132 feet, 4 juveniles at 216 feet, and 1 

 young (2.4 mm. wide) at 453 feet. 



Other material examined: About 175 specimens from Labrador 

 to Massachusetts and Khode Island, over 30 specimens from the 

 eastern Atlantic (Russia, Norway, and other localities, and 7 speci- 



