192 Panama Shells, tboohid-S. 



centric lines:- with many elevated granulous spiral lines,' of 

 whicli three larger are next above the suture : spire with the 

 outlines nearly rectilinear : apex acute : whorla nine,, planulate 

 or concave next below the suture, very convex or. . suban- 

 gular next above the suture, which is moderately impressed ; 

 last whorl subplanulate anteriorly : aperture subquadrate : 

 labrum thin : columella obliquely produced, nearly straight: 

 ximbilicus wanting. 



Mean divergence . about , 60° ; length .48 . inch ; greatest 

 breadth .44 inch ; least breadth .4 inch. 



/Station. — Under stones at low water mark. 

 Habitat. — Panama ; C. B. A. 1 



7 specimens were collected on the reef. We have named 

 this pretty species in honor of Isaac Lea, Esq., of Philadelphia. 



276. Troclius lima. 



/Synonymy. 



Trochus lima Phil, in Zeitachr. f. Malak. vol. for 1849. 



p. 159. - - Mar. 1850. 

 Phil, in Kust. Conch. Cab. pi. 44. f. 15. 1850. 



Station. — Under stones, between the low water mark of. the 

 spring tides and that of the neap tides. 

 Habitat. — Unknown ; Philippi. 



Santa Barbara ; E. Jewett I Gould MSS. 



Panama ; C. B. A. I 

 We collected 75 specimens on the reef 



277. Trochus lividns. 



Synonymy. 



Trdchus lividus Phil, in Zeitschr. f. Malak. vol. for 1849, 



P- 168. Mar. 1850. 



Pliil- in Kust. Conch. Cab. pi. 45. f. 8. 1850. 



This species belongs to the subgenus Modulus. 



