148 Panama jShells. MUEICID-S). 



spire with the outlines nearly rectilinear : whorls eight, convex, 

 with a moderately impressed suture : aperture rather narrow : 

 labrum rather sharp, thickened behind the edge by a very 

 stout rib : canal rather wide, very short. 



Mean divergence about 83° ; length .8 inch ; breadth 

 .1 inch ; length of spire .2 inch. 



Station. — Unknown. 



Hahitat. — Panama ; C. B. A. 1 



18 specimens were found in the calcareous sand on the 

 shore. 



184. Pleui'otoma zonulata. 



Synonymy. 



Pleurotoma cincta Sowb. (non Lam.) in Proc. Zool. Soc. 



Lond. p. 136. - - - Dec. 1833. 



zonulata Reeve Conch. Syst. pi. 234. f. 10. 1842. 



Reeve Conch. Icon. pi. 6. f. 39. Feb. 1843. 



The name given by Mr. Sowerby was pre-occupied by 

 Lamarck. 



Station. — Sand and gravel at a depth of 7 fathoms ; Cuiqjing I 

 Sowerby : also Eeeve. 



Habitat. — Monte Christi and Xipixapi ; Cuming 1 Sowerby : 

 also Eeeve. ■ 

 Panama ; C. B. A. I 

 Two specimens were obtained. 



Of each of the following species we obtained but one speci- 

 men in a more or less imperfect condition. They were found 

 near Panama, mostly in the calcareous sand. 



185. Pleurotoma a. 



186. Pleurotoma .- h. 



187. Mangelia c 



