172 Panama Shells. LITTOKINID.E. 



Habitat Panama ; C. B. A. ! 

 3,300 specimens were collected. 



234. Littorina conspersa. 



Synonymy. 

 Littorina conspersa Phil. Abbild. II. pi. 4. f. 14. March 1847. 



Some individuals, of a more ventricose form and with 

 broader striae, approximate towards L. puncticulata Phil. ; but 

 for the most part the two species are easily distinguished. 



Station. This species was found chiefly on large fragments 

 of rock at high water mark. 



Habitat. Eeal Llejos ; Philippi. 



Taboga and Panama ; C. B. A. ! 

 320 specimens were collected. 



235. Littorina (?) excavata. Nov. sp. 



Shell obliquely ellipsoidal : very dark brown at the apex, in 

 the umbilical region and in the fauces, otherwise pale horn 

 color : with several spiral raised lines, and intermediate very 

 minute spiral striae ; apex subacute : spire small, with the out- 

 lines very curvilinear : whorls nearly four, compressed, with a 

 distinct suture ; last whorl ventricose : aperture subovate : 

 labrum very sharp, but thickened much a little behind the 

 edge: columella dilated and thickened: region around the 

 umbilicus much excavated : umbilicus small. 



Mean divergence about 90 ; length .17 inch ; breadth 

 .13 inch ; length of spire .04 inch. 



The generic character of this species is doubtful. It resem- 

 bles a small NARICA. 



Station. Unknown. 



Habitat. Panama ; C. B. A. 1 



1 specimen was found in the sand. 



