73 



■with a very distinct suture: aperture ovate-rliomboiclal : labium 

 slightly thickened : umbilical region not indented. 



Mean divergence about 10° ; length of spire .21 inch ; total length 

 .25 inch ; breadth .05 inch, 



Chemnitzia subulata. Shell much elongated, subulate : white, 

 or pale brownish white with two spiral bands of pale wax color, and 

 a third of the same color anteriorly : with about twenty-eight to thirty 

 rather prominent slender transverse ribs, which are not quite obsolete 

 below the convexity of the last whorl ; in the intercostal spaces and 

 anteriorly with numerous excessively fine crowded spiral stria?, of 

 which one next below the suture is larger: nucleus consisting of about 

 one and one-half whorls, moderately oblique : spire with a slightly 

 curved axis, with the outlines scarcely convex : whorls ten after the 

 loss of the nucleus, rather convex, with a well impressed suture : ap- 

 erture ovate, acute above : labium slightly thickened : umbilical re- 

 gion slightly indented. 



Mean divergence about 11°; length of spire .10 inch; total length 

 .17 inch ; breadth .045 inch. 



Chemnitzia levis. Shell much elongated : white : wath about 

 twenty-eight to thirty transverse rather stout ribs, which are not pro- 

 duced below the convexity of the last whorl ; without spiral strias ; 

 with the intercostal spaces of the last whorl anteriorly depressed be- 

 low the surface of the anterior region ; with scarcely perceptible lines 

 of growth anteriorly : nucleus consisting of about one and one-third 

 smooth whorls, quite oblique : spire with the outlines nearly recti- 

 linear : whorls nine or ten, scarcely convex, a little constricted above : 

 aperture rhombic ovate : labium scarcely thickened : umbilical region 

 not indented. 



Mean divergence about 10"; length of spire .12 inch ; total length 

 1G5 inch ; breadth .04 inch. 



Chemnitzia substriata. Shell moderately elongated: white, 

 with a slight tinge of wax color next above the suture : with about 

 twenty-two to twenty-four transverse rather stout ribs; in the inter- 

 costal spaces and anteriorly with very numerous crowded excessively 

 minute spiral strias, which are scarcely perceptible under a common 

 magnifier ; on the middle of the whorls is a spiral series of shallow 

 pits in the intercostal spaces ; on the last whorl, witk the anterior ex- 

 tremities of the intercostal spaces moderately depressed below the 

 surface of the anterior region : spire with rectilinear outlines : whorls 

 about eight, planulate, with a distinct suture : aperture rhombic- 

 ovate : labium scarcely thickened : umbilical region scarcely indented. 



