COLUMBELLA.— Plate XIX. 



Hab. ? 



An elegantly formed species, singularly characterized by 

 the presence of an inky stain of short black lines on the 

 back next the suture. 



Species 105. (Mus. Cuming.) 

 OoLUMBELLA UNicoLOR. Col. testd ovatd, medio ventri- 



cosa, fulvo-castanm, Irezigatd, suturd subimpressd ; 



aperturd latiusculd, supra H infra subefftisd, labro in- 



crassato, intus denlieulato. 

 The one-coloured Columbella. Shell ovate, ventri- 



cose in the middle, fulvous-chestnut, smooth, suture 



rather impressed ; aperture rather broad, somewhat 



effused above and below, lip thickened, denticulated 



within. 

 SowERBY, Pro. Zool. Soc. 1832, p. U'J. 

 Hah. Galapagos Islands ; Cuming. 



The effused contour of the aperture nnd outer lip of this 

 species arises from its inclination to become notched. 



The rcsset-brown Colcmbella. Shell acuminately 

 oblong, dark-brown within and without, columella 

 white, whorls slightly convex, smooth ; aperture 

 rather bi-oad, lip thin. 



Gaskoin, Pro. Zool. Soc. 1851, p. 6. 



Hab. ? 



It is extremely doubtful whether this shell is correctly 

 placed in the genus Columbella. 



Species 106. (Mus. Cuming.) 

 Columbella pvlla. Col. testd acuminato-oblonga, iiitus 

 exfusque saturate brunned, columelld alba, anfractibus 

 convexiusculk, l/pvibus ; aperturd lathtscnld, labro 

 tenui. 



Species 107. (Mus. Cuming.) 



Columbella unifasci.vta. Col. testd ovatd, fidvo-ca-t- 

 ianed, zonula fulvescente-albd medio eingulatd, anfrac- 

 tibus convexis, lavibus ; aperturd breviusculd, supra et 

 infra effiisd, intus minute dentictdatd. 



The one-banded Columbella. Shell ovate, fulvous- 

 chestnut, encircled round the middle with a narrow 

 fulvous-white zone, whorls convex, smooth ; aperture 

 rather short, effused above and below, minutely den- 

 ticulated within. 



Sowehby, Pro. Zool. Soc. 1832, p 114 

 Columbella unizunalis. Gray. 



Hab. Valparaiso (under stones, at low-water) ; Cuming. 



So closely allied to C. unicotor as to render it doubtful 

 whether it is a distinct species. 



