COLUMBELLA. Panama Shells. 89 



southern limit, so far as authentic testimony goes, reached by 

 any of the species which inhabit the Bay of Panama, and we 

 have, therefore, some doubt of the accuracy of Kiener's state- 

 ment. 



88. Coliunbella gracilis. Nov. sp. 



Shell long ovate conic ; upper whorls pale brown ; with irre- 

 gular spots of darker reddish brown, mostly near the suture 

 and nearly covering the last whorl, on the periphery of which 

 is a whitish band articulated with arrow-headed brown spots : , 

 with very numerous small ribs, of which the posterior ends only 

 remain on the back of the last whorl ; anteriorly with revolv- 

 ing striae : apex acute : spire conic : whorls eight, scarcely con- 

 vex, with the suture distinctly impressed : aperture narrow : 

 labrum variciform, rather sharp-edged, thickened behind, a lit- 

 tle sinuate posteriorly, with a few granules inside : columellar 

 lip nearly smooth. 



Mean divergence about 37 : length .3 inch ; breadth .125 

 inch : length of spire .2 inch. 



Var. with the color nearly uniform dingy brown. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



We were indebted to the hermit crabs for 7 specimens. 



89. Coluiiibella guttata. 



Synonymy. 

 Columbella guttata Sowb. in Proc. Zool. Soc. Lond. p. 118. June 1832. 



Mull. Synop. Nov. Test. Viv. p. 88. May 1836. 



cribraria Sowb. (non Lam.) Thes. Conch, p. 129. 



No. 51. pi. 38. f. 112. 1844. 



Mr. Sowerby, having relinquished the species, has re-used 

 the name for quite a different species, in Proc. Zool. Soc. Lond. 

 p. 50. Mar. 1844, and in Thes. Conch, p. 131. pi. 39. f. 124.* 



* In his Index this species is called C. punctate. 



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