CANCELLARIA. Panama Shells. 133 



spiral bands of white : with, on each whorl, about thirty narrow 

 prominent transverse ridges more or less inequidistant ; with 

 numerous raised spiral lines, of which five are seen on the spire, 

 and which on the last whorl are less prominent and wide than 

 the transverse ridges : apex subacute : spire with the outlines 

 nearly rectilinear : whorls six, convex, with the suture subca- 

 naliculate ; last whorl rather large : aperture semiobovate, with 

 long sharp ridges within on the right side : labrum sharp, 

 thickened a little behind the edge, scalloped by both the inter- 

 nal and the external sculpture : columella stout, with three 

 plaits, of which the upper one is lamelliform and very promi- 

 nent, and the lower one is small and very oblique : canal short : 

 with a small umbilical chink bounded by the raised labrum and 

 a spiral bridge. 



Mean divergence about 68 ; length 1.05 inch ; breadth .65 

 inch ; length of spire .45 inch. 



This species is not so densely and finely sculptured as C. 

 elegans Sowb., and is less ventricose than C. asperdla Lam. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 3 specimens were obtained. 



155. Caiicellaria clavatula. 



Synonymy. 



Cancellaria clavatula Sowb. in Proc. Zool. Soc. Lond. p. 52. Mar. 1832. 



- Mull. Synop. Nov. Test. Viv. p. 74. 1836. 

 Sowb. Conch. 111. No. 11. pi. 10. f. 12. 1841 . 



- Kiener Iconog. p. 31. pi. 5. f. 2. 



Reeve Conch. Syst. pi. 230. f. 12. 1842. 



Lam. An. sans Vert. IX. 416. No. 23. 



(Desh. eel.) - 1843. 



Lam. An. sans Vert. III. Pt. 2. p. 648. 



No. 23. (Desh. ed. tert.) 1844. 



Sowb. Thes. Conch, p. 445. No. 20. 



pi. 92. f. 13. pi. 95. f. 67. 1848. 



