CALYPTR.EA. Panama /Sheik. 219 



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

 mens were found attached to stones near low water mark. 



Habitat. Panama and the Gallapago Is. ; Cuming ! Sowerby. 



Panama ; C. B. A. ! 

 16 specimens were collected. 



330. Calyptraea aberrant. Nov. sp. 



Shell irregularly, somewhat concave externally : papyraceous, 

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

 subterminal : 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. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 Only 1 specimen was found. 



331. Calyptraea (Syphopaiella) 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. Under stones at low water mark, 



Habitat. Panama ; C. B. A. I 

 3 specimens were found. 



