3PLEUROTOMA. Panama /Shells, 139 



granules next above the suture, and a not very prominent keel 

 above the middle of the whorls ; on the last whorl three other 

 keels appear, which are more or less granulated: apex very 

 acute : spire with convex outlines : whorls eleven, angular un- 

 der the spiral keel, beneath it concave, with an indistinct suture : 

 aperture long, with a rather deep sinus : canal very short, wide. 

 This species has some resemblance to P. discors. It must also 

 resemble P. Afekkersi Menke, Zeitschr. 1851. p. 20. 



Mean divergence about 38; length .8 inch; breadth .28 

 inch ; length of spire .5 inch. 



/Station. Unknown. 



Habitat Panama; C. B. A.I 

 Only 1 specimen was obtained, 



165. Pleu.ro toma Mcanalifera. 



Synonymy. 



Pleurotoma bicanalifera Sow!?, in Proc. Zool. Soc. Lond, 



p. 136. Dec. 1833. 



Mull. Synop. Nov. Test. Viv. p. 



112. May 1836. 

 Reeve Conch. Icon. pi. 12. f. 103. May 1843. 



Station. Sandy mud at a depth of 10 fathoms ; Cuming ! 

 Sowerby : also Eeeve, 



Habitat. Shores of Central America ; Cuming 1 Sowerby : 

 also Miiller, 



Bay of Montija; Cuming! Eeeve, 



Taboga; C. B, AJ 

 We found only 1 specimen. 



166. Pleurofoma collar is* 



Synonymy. 



tPleurotoma cellaris Sowb, in Proc. Zool, Soc. Lond. 



p. 139, - - Dec. 1833. 



