CALTPTE^A. Panama Shells. 219 



/Nation. — Attached to rocks ; Cuming ! Sowerby. Our speci- 

 mens were found attached to stones near low water mark. 



Habitat, — Panama and the Gallapago la. ; Cuming I Sowerby. 



Panama ; 0. B. A. 1 

 16 specimens were collected. 



330. €alyptrsea aberrans. Nor. sp. 



Shell irregularly, somewhat concave externally : papyraceous, 

 pearly, with fine irregular striso of growth : apex very minute, 

 eubterminal : the cup in our unique specimen is probably imper- 

 fect ; what remains consists of a very thin, deeply concave, nar- 

 row lamina, transversely attached under the apex of the shell. 

 In texture^ this shell much resembles, a valve of an Anomia. 



Length .7 inch ; breadth .59 inch. 



^fetiwn. — Unknown. 



Habitat. — ^Panama ; 0. B. A. I 

 Only 1 specimen was found. 



331. Calyptraea (Syphopatella), aspersa. Nov. sp. 



Shell conic: thin: dingy or brownish white, irregularly 

 sprinkled with many reddish brown spots : with very short and 

 irregular minute wrinkles: apex acute, central: lamina with 

 the fold appressed only at the inner margin, broadly expanded^ 

 making about two thirds of a revolution : margin very thin 

 and acute. 



Diameter .55 inch ; height .21 inch. 



Station. — Undbr stones at low water mark. 



HIsMae.— Panama; O. R A, 1 

 8 specimens were found. 



