96 Panama Shells. PURPURIDJL 



in C. nigricans a revolving impressed line cuts the posterior 

 ends of the ribs. 



98. Columbella parva. 



Synonymy. 



Columbella parva Sowb. in Proc. Zool. Soc. Loud. p. 52. Mar. 1844. 



Sowb. Thes. Conch, p. 142. No. 83. pi. 40. 



f. 170. 1844. 



Station. Under stones ; Cuming ! Sowerby. 



p 



Habitat. Monte Christi ; Cuming ! Sowerby. 

 Panama ; C. B. A. ! 



We found only one specimen. 



99. Columbella pulchrior. Nov. sp. 



Shell rather long ovate : with a whitish revolving band next 

 below the suture articulated with large spots of a dark slate 

 color ; with a translucent ground of pale yellowish brown, on 

 which are placed in quincunx order rather numerous, exces- 

 sively minute sharply denned dots of reddish brown ; with one 

 or two large irregular spots of dark brown near the end of the 

 last whorl : surface smooth and shining : apex acute : spire 

 conic : whorls six or seven, scarcely convex, with the suture 

 lightly impressed : aperture narrow : labrum rather sharp, 

 thickened behind, with a few granules inside : columellar lip 

 nearly smooth. 



Mean divergence about 4-5 ; length .15 inch ; breadth .07 

 inches ; length of spire .075 inches. 



Station. Under stones near low water mark. 

 Habitat. Panama ; C. B. A. ! 



We found of this rare and elegant little shell only 5 speci- 

 mens. 



