CLASS GASTROPODA 
79 
Distribution. North America, West Indies, Norway, Britain, Medi¬ 
terranean. 
Cingula martyni Dali, 1886 
Plate 84, fig. 5 
Proceedings of the United States National Museum, 9:306; PI. 3, fig. 9 Hid 41*485- 
PI. 41, fig. 5. 
Shell elongate-ovate, light chestnut brown. Nuclear whorls scarcely 
differentiated from the succeeding turns, smooth. Post-nuclear whorls 
well-rounded, smooth, excepting fine incremental lines. Suture well-con¬ 
stricted. Periphery and base of the last whorl inflated, well-rounded, the 
latter narrowly umbilicated, smooth, excepting fine, incremental lines. • 
Aperture very large, broadly oval, almost circular; outer lip decidedly 
expanded, thin; columella strongly curved and very slightly reflected; 
parietal wall covered with a thick callus, which renders the peritreme 
complete. Length, 5; diameter, 3.2 mm. (Dali.) 
1 ype in United States National Museum, No. 213o27. Type locality, 
Kyska Harbor, Aleutians, Alaska. 
Range. Bering Strait to Aleutians and Chignik Bay, Alaska. 
Described as Cingula robusta martyni. 
Cingula martyni scipio Dali, 1886 
Plate 84, fig. 6 
Proceedings of the United States National Museum, 9:306; PI. 4, fig. 10. 
This form is much rarer than the typical, about one per cent of those 
collected being of this sort, but with a certain number of intermediate 
grades. There seems to be no other difference than that of form, faint 
revolving lines being occasionally present in both; both are of the same 
reddish grape-color with whitish bloom, and whitish border to the aper¬ 
ture. (Dali.) 
Type in United States National Museum. Type locality, Aleutian 
Islands. 
Range. Pribilof Islands to the Aleutians and to Middleton Island, 
Alaska. 
Described as Cingula robusta scipio. 
Cingula alaskana Bartsch, 1912 
Plate 84, fig. 4 
Proceedings of the United States National Museum, 41:486; PI. 41, fig. 4. 
Shell subglobose, light brown. Nuclear turns one and one-quarter, 
well-rounded, smooth, excepting fine, incremental lines. Post-nuclear 
