230 American Seashells 



Neptunea ventricosa Gmelin Fat Neptune 



Plate 24s 



Arctic Ocean and Bering Sea. 



3 to 4 inches in length, heavy, with a large, ventricose body whorl. 

 Axial ribs or growth lines coarse and indistinct, rarely lamellate. Shoulders 

 sometimes weakly nodulated. Spiral cords absent or very weak. Color a 

 dirty-brownish white. Aperture white or flushed with brownish purple. 

 Moderately common offshore. This is Chrysodomus satura Martyn and its 

 several poor varieties. 



Neptunea pribiloffensis Dall Pribiloff Neptune 



Plate 241 



Bering Sea to British Columbia. 



4 to 5 mches in length, similar to N. lyrata, but with a lighter shell, with 

 weaker and more numerous spiral cords, and with more numerous and 

 stronger secondary spiral threads. Outer lip more flaring and the siphonal 

 canal with more of a twist to the left. Fairly commonly dredged from 50 to 

 100 fathoms. 



Neptunea lyrata Gmelin Common Northwest Neptune 



Plate 24q 



Arctic Ocean to Puget Sound, Washington. 



4 to 5 inches in length, % as wide, solid, fairly heavy. With 5 to 6 

 strongly convex whorls, bearing about 8 strong to poorly developed, raised 

 spiral cords (2 of which usually show in each whorl in the spire). Faint, 

 quite small, spiral threads are also present. Exterior dull whitish brown. 

 Aperture enamel-white with a tan tint. Fairly common in Alaska from shore 

 to 50 fathoms. This is Chrysodo?mis Jirata Martyn. 



Subgenus Ancistrolepis Dall 1894 

 Neptunea eucosmia Dall Channeled Neptune 



Figure 516 

 Alaska to Oregon. 



1V2 inches in length, solid, outer lip sharp, strong and crenulated. Si- 

 phonal canal short, wide and slightly twisted. Spiral cords strong. Suture 

 channeled. Shell chalk-white, but covered with a rather thick, yellow-brown 

 to gray periostracum which is axially lamellate and bears minute, erect hairs. 

 Aperture glossy-white. Not uncommonly dredged from 62 to 780 fathoms. 

 N. calif ornica Dall and bicincta Dall appear to be this species. 



