PLEUROTOMA. Panama Shells. 147 



Pleurotoma rudis Mull. Synop. Nov. Test. Viv. p. 109. May 1836. 



- Reeve Conch. Icon. pi. 7. f. 53. Mar. 1843. 



Station. Under stones ; Cuming ! Sowerby : also Eeeve : 

 also Miiller. 



Habitat. Monte Christ! ; Cuming ! Sowerby ; also Eeeve : 

 also Miiller. 



Monte Christ! ; Jay. 



Panama ; C. B. A. I 

 2 specimens were obtained. 



182. Pleurotoma rustic a. 



Synonymy. 



Pleurotoma mstica So\vb. in Proc. Zool. Soc. Lond. p. 138. Dec. 1833. 



Mull. Synop. Nov. Test. Viv. p. 116. May 1836, 



thiarella Kiener Iconog. p. 56. pi. 23. f. 2. ? 



rustica Reeve Conch. Icon. pi. 11. f. 91. May 1843. 



Mr. Eeeve's reference to Proc. Z. S. 1843, is a misprint for 

 1833. 



Station. Under stones ; Cuming I Sowerby : also Eeeve : 

 also Miiller. We found it under stones near low water mark. 



Habitat. Xipixapi ; Cuming ! Sowerby : also Eeeve : also 



Miiller. 



West Columbia ; Jay. 

 Panama ; C. B. -A. ! 



10 specimens were collected, most of them more strongly 

 striated spirally on the last whorl than is represented in the 

 Conch. Icon. 



183. Pleurotoma striosa. Nov. sp. 



Shell slender : dingy white, with a more or less distinct 

 brown spiral stripe on the last whorl issuing from the upper 

 part of the aperture : with indistinct crowded spiral stride, with 

 ten or twelve very slender ribs on each whorl : apex acute : 



