162 Panama Shells. LITTORINID^E. 



A variety (?) is more slender, and has the ribs less pro- 

 minent. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



85 specimens were collected from the sand. 



214. Coeciim lave. Nov. sp. 



Shell well arcuated, rather stout, of nearly uniform diameter : 

 white : smooth and shining : apex very prominent 

 Length .08 inch ; breadth .027 inch. 



Var. (?) minus is more slender, with the apex less prominent 

 Length .062 inch ; breadth .02 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



2 specimens were found, viz. 1 of each variety. 



215. Ccecum laqueatum. Nov. sp. 



Shell slender, moderately arcuated, with the diameter regu- 

 larly increasing: white: longitudinally furrowed with about 20 

 shallow somewhat unequal grooves: apex moderately promi- 

 nent, lateral. 



Length .11 inch; breadth .028 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 2 specimens were obtained. 



216. CoBCiun monstrosum. Nov. sp. 



Shell well arcuated, stout in the lower half and very slender 

 in the upper half^ with the transition abrupt, as if the effect of 

 an accident: ivory white: on the upper part with about 18 

 rather stout approximate moderately prominent rings with flat 



