PHYSA. 163 
arated. Mr. W. G. Binney includes Ph. ellip- 
tica herein, but I believe it to be distinct and 
have so treated it. It is a species of wide dis- 
tribution, but rarely found on the coast side 
of the Allegheny mountains. It extends 
westward to Kansas and Nevada, and south- 
ward from Michigan to Alabama. 
42. PHYSA ELLIPTICA, Lea, 
Plate 9, fig. 9. 
Physa aurea, Lea, Plate 9, fig. 10. 
Physa Troostiana, Lea. Plate 9, fig. 11. 
Physa oleacea, Tryon. Plate 9, fig. 12. 
Physa Febigeri, Lea. Plate 9, fig. 18. 
Physa Nicklin, Lea Plate 9, fig. 14. 
Physa Altonensis, Lea. Plate 9, fig. 15. 
Shell completely oval, with the outline of 
the spire not elevated above a continuation of 
the general curve of the body; spire very 
short, apex minute, suture linear, but mar- 
gined; whorls four, rapidly increasing, the 
last large, narrowly oval; aperture long and 
(79) 12 
