67 



with strong transverse ribs, smooth on the summits, about ten on each 

 whorl ; with unequal spiral microscopic strice : apex acute : spire with 

 rather convex outlines : whorls about six, moderately convex, with a 

 distinct suture : aperture rather narrow : labrura well thickened by 

 the last rib : sinus rather large : canal very short. Similar to M. 

 hrevis. 



Mean divergence about 40°; length of spire .1 inch ; total length 

 .17 inch; breadth .08 inch. 



ScALARiA LiGATA. Shell rather short, conic: white: varices 

 thirteen on each whorl, rather strong, well elevated, continuous across 

 the suture and but slightly depressed by it : whorls five or six, scarcely 

 contiguous : aperture very slightly elongated obliquely : umbilical re- 

 gion with a small ridge parallel with the labium. 



Mean divergence nearly 50^; length of spire .15 inch; total 

 length .25 inch ; breadth .14 inch. 



Phasianella affinis. Shell ovate : with waving or zigzag 

 transverse flames of brown or red ; and very numerous minute well 

 defined dots of red or brown, with white shadows on their right side, 

 somewhat in irregular waving or zigzag series, on a whitish ground : 

 apex acute : spire with moderately convex outlines : whorls nearly 

 five, moderately convex, a little flattened along the middle, with a mod- 

 erately impressed suture : aperture elliptical: with a small umbilicus 

 and groove issuing from it, which are sometimes concealed by the 

 labial deposit. This species was at first mistaken for P. pulla. 



Mean divergence about 60°; length of spire .16 inch ; total length 

 .31 inch ; breadth .19 inch. 



Phasianella brevis. Shell snbglobose : with a whitish ground 

 and large spots of red on the upper part of the whorls ; pale red on 

 the anterior and middle of the last whoi'l ; with well defined spots of 

 dark red sprinkled over the whole surface : with microscopic spiral 

 stride on the upper whorls, otherwise smooth : apex rather obtuse : 

 spire with very convex outlines : whorls about four, very convex, with 

 a rather deep suture : aperture large, ovate-orbicular : umbilicus want- 

 ing. 



Mean divergence about 80° ; length of spire .04 inch ; total length 

 .1 inch ; breadth .085 inch. 



Phasianella tesselata. Shell ovate conic : with fine rather 

 distant parallel spiral lines of brown, which descend more rapidly 

 than the whorls ; with transverse irregular flames of olive brown or 

 red, which have white shadows on the left side, and which form with 



