The Margin Shells 



shade, occurs from Cape Hatteras to the West Indies. There 

 are usually a few chestnut spots on the lip margin. 



Variety borealis, Verr., ^ inch long, occurs from Rhode 

 Island to Cape Fear. 



The Pear-shaped Marginalia (A/, pyriformis, Cpr.) is a 

 minute white shell, yV of an inch in length, sometimes tinged with 

 orange. 



Habitat. — Monterey to San Diego, Cal. 



Genus ERATO, Risso 



Shell obovate, polished; spire short, conical, distinct; aper- 

 ture narrow, long; outer lip toothed, thickened in the middle; 

 columella plaited. Shell and animal look like a Cyprsea. 



E. columbella, Menke., is a little rosy "coffee-bean" shell 

 resembling Trivia. Length, about J inch. 



Habitat. — Santa Barbara, Cal. 



E. Maugerise, Gray, represents the genus from Cape Hatteras 

 southward to the Florida Keys and westward to Texas. 



GO 



