70 



CiNGULA (?) CONCINXA. Shell broadly ovate-conic: subtrans- 

 parent, wax brown, darker at the sutural ridge : smooth and shining ; 

 at the summit of the whorls with a narrow ridge scarcely elevated, 

 but separated by an impressed line : apex i-ather obtuse : spire with 

 the outlines moderately convex : whorls five, quite convex, with a 

 well impressed suture ; last whorl large : aperture acute above, in 

 the rest regularly ovate : lip a little reflected on the left side : um- 

 bilical region slightly indented. 



Mean divergence 53° ; length of spire .03 inch ; total length ,075 

 inch; breadth .055 inch. 



CiNGULA (?) SOLIDA. Shell subconic, Well elevated : dark brown, 

 with the lip and apex white : with a few distant subgranular elevat- 

 ed spiral lines, of which the alternate ones are much more minute ; 

 anteriorly smooth : apex obtuse : spire with the outlines nearly rec- 

 tilinear : whorls five, slightly shouldered above, scarcely convex, with 

 a well impressed suture : aperture orbicular, parallel with the axis of 

 the spire : lip reflected on the left side and on the adjacent part of 

 the anterior side : umbilical region moderately indented. 



Mean divergence about .32° ; length of spire .05 inch ; total length 

 .085 inch ; breadth .045 inch. 



CiNGULA (?) CONICA. Shell elongated, conic: whitish, with large 

 irregular spots of wax color, and a wax-colored summit : solid, with 

 three or four slightly elevated obtuse spiral ridges, and about the 

 periphery of the last whorl two or thi-ee more, all of which are slight- 

 ly striated across ; on the lower whorls with nearly obsolete broad 

 ridges ; anteriorly smooth : apex acute : spire with rectilinear out- 

 lines : whorls six and one-half, flat, with a lightly impressed suture ; 

 last whorl with a moderately acute periphery : apei'ture between 

 quadrate and orbicular, nearly parallel Vith the axis of the spire : 

 lip reflected on the left side and on the adjacent part of the anterior 

 side : umbilical region moderately indented. 



Mean divergence about 32°; lengthof spire. .005 inch ; total length 

 .105 inch ; breadth .06 inch. 



These last three species we have referred, with some doubt, to Cin- 

 gula of Fleming, restricting this genus to the section in which the 

 labrum is not thickened and the aperture is Turbinoid, and excluding 

 Rissoa in which the aperture is Melanoid and the labrum thickened. 

 C. concinna however is with difficulty referred to the same generic 

 type with C. solida and C. conica, being eminently distinguished by 

 its smoothness and translucency, (in this respect resembling, as also 



