VIVIPARA. 



23 



** Not handed, spire short, form oval-quadrate. 



9. VIVIPARA TROOSTIANA, Lea. 



Plate 15, fig. 3. 



Shell ventricose-conical, thin, pellucid, 

 smooth, perforate; spire short, sutures much 

 impressed; whorls 4, convex; yellowish horn- 

 color, white within the large rounded aperture. 



Length 18, diam. 16 mill. 



Tennessee. 



More nearly related by form to V. suhjmr- 

 purea than to any other species. My figure is 

 drawn from the type specimen. 



10. VIVIPARA HALEIANA, Lea. 



Plate 15, fig. 5. 



Shell ventricose-conical, nearly globose, 

 rather thin, imperforate ; whorls 4, very con- 

 vex, the spire short and small, and suture well 

 impressed. Reddish horn color, the large 

 rounded aperture bluish within. 

 [49] 



