COLUMBELLA. Panama Shells. 99 



Acapulco; Lesson. 

 Payta ; Fontaine ! D'Orbigny. 

 Mazatlan ; Melchers ! Menke. 

 Acapulco ; Jay. 



Mazatlan ; Lt. Green ! Gould MSS. 

 Taboga; C. B. A. ! 

 We obtained only 1 specimen. 



103. Columbella tesselata. Nov. sp. 



Shell rather long ovate : dark sea-green, tinged with black 

 or brown, fading to a brownish red ; more or less tesselated 

 with nearly quadrangular white spots : with about fifteen stout 

 approximate ribs, which lean forward, and which are obsolete 

 on the back of the last whorl ; with all the surface ridged by 

 strongly impressed revolving stride : apex acute : spire conic : 

 whorls eight, scarcely convex, with a distinct suture : aperture 

 rather long: labrum variciform, thick behind, a little sinuate 

 posteriorly, with three or four granules inside : columellar lip 

 slightly granulous. 



Mean divergence about 48 ; length, .225 inch ; breadth, 

 .105 inch ; length of spire, .13 inch. 



This species resembles the small variety of C. nigricans. It 

 also resembles C. lentiginosa Hinds (Zool. Sulph. Moll. pi. 10. 

 f. 21, 22), in coloring and sculpture ; but the latter is repre- 

 sented as being much wider and as having a short spire. 



Station. This species was found under stones, near low 

 water mark. 



Habitat. Panama ; C. B. A. ! 

 We collected 27 specimens. 



104. Columbella turrita. 



Synonymy. 

 Columbella turrita Sowb. in Proc. Zool. Soc. Lond. p. 115. June, 1832. 



