34 PHYSA SCALARIS. 



whirls five, convex: suture deep: aperture ob- 

 tuse posteriorly, peritreme continuous; labium 

 not appressed anteriorly, and without a fold. 



Color very pale yellowish-brown; labium, 

 aperture, and varicose bands, white. 



Geographical Distribution. Sent to me 

 from Indiana by Mrs. Say. 



PHYSA SCALARIS, Jay. 



Plate 4. — Fig. 9. 



Testa, ovata, anfractibus postice angulatis: spira plano- 

 depressa. 



SYNONYMS AND REFERENCES. 

 Physa scalaris, Jay's Catalogue, 1839, pi. 1, figs. 8, 9. 



DESCRIPTION. 



Shell short, ovate, whirls with a distinct 

 angulated shoulder: apex truncate-flattened: 

 columellar fold obsolete. 



Color .... bleached. 



