1 10 American Seashells 



Subgenus Calliotropis Seguenza 1903 

 Lischkeia ottoi Philippi Otto's Spiny Margarite 



Nova Scotia to Nortii Carolina. 



% to % inch in length, equally wide. Moderately thin with a sharp lip. 

 The round, narrow umbilicus is partially covered by the top of the colu- 

 mella. Color pearly-white. Sculpture of whorls in spire with 3 evenly spaced 

 spiral rows of prickly beads. Suture wavy. Base of shell with 4 to 5 spiral 

 threads which bear smaller, often obscure, beads. Nuclear whorls with axial 

 lamellae. S. regalis Verrill and Smith is the same species. Common from 50 

 to 100 fathoms. 



Genus Solariella Wood 1842 

 (Machaeroplax Friele 1877) 



Solariella obscura Couthouy Obscure Solarelle 



Figure 3if, g 



Labrador to off Chesapeake Bay, Virginia. 



^ inch in length, similar to Margarites costalis, but with whorls made 

 more angular by one large, feebly beaded, spiral cord above the periphery. 

 Base smoothish except for microscopic, spiral scratches. Umbilicus narrower 

 and bordered by an angular rim. Color grayish to pinkish tan, often worn to 

 reveal a pearly-golden color. Aperture pearly-white. Some specimens may 

 have weak axial riblets below the strongest spiral cord on the periphery of the 

 whorl. Commonly dredged from 3 to 400 fathoms, especially on the Grand 

 Banks. 



Solariella lacunella Dall Channeled Solarelle 



Figure 32b, c 



Virginia to Key West, Florida. 



% inch in length, equally wide, thick, pure white. Whorls convex. 

 Aperture circular, internally pearly. Suture channeled. Whorls with 6 spiral 

 cords, bottom 3 smooth, the upper ones axially beaded. Nuclear whorls 

 glassy, with microscopic axial ribs. Umbilicus round, narrow, deep, lined 

 with spiral rows of coarse beads. Very commonly dredged from 18 to 100 

 fathoms. 



Solariella lamellosa Verrill and Smith Lamellose Solarelle 



Plate 17X 



Massachusetts to Key West, Yucatan and the West Indies. 



Ys inch in length, similar to 5. lacunella, but with a much deeper channel 

 at the suture below which are numerous, small axial, short lamellar-like ribs. 



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