COliUMBEijLA. Panama Shelb. 99 



Acapuloo; Lesson. 

 "Payta; Fontaiile 1 D'Orbigny. 

 Mazatlan ;~ Melchers I Menke. 

 Acapulco ; Jay. 



Mazatlan ; Lt. Green ! Gould MSS. 

 Taboga; C. B. A. ! 

 "We obtained only 1 specimen. 



■ " Ids: ti6invkhelisi'tcsselsitsi. 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 strise : 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: (Joliimellar 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 <7. hntiginosa 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 ; G. B. A. 1 

 We collected 27 specimens. 



- 104.- Coluinbclla tiirrita. 



Synonymy. 

 Columbella- turrita Sowb.in Proc. Zool.Soc. Lond, p. 116. Juno, 1832. 



