PHYSA DISTORTA. 35 



OBSERVATIONS. 



Of this species, which occurs in Florida, I 

 have seen but the single specimen in Dr. Jay's 

 collection. 



PHYSA DISTORTA, Hald. 



Plate 5. — Figs. 1 — 3. 



P. testa lsevi, diaphanii, albida perforata contorta et 

 transversa: anfractibus 3 convexis: sutura valde impressa: 

 apertura subrotundata. 



SYNONYMS AND REFERENCES. 



Physa (Diastropha) distorta, Hald. This work, Oc- 

 tober, 1840. 



DESCRIPTION. 



Shell transverse, short, translucent and um- 

 bilicated; composed of three very convex whirls, 

 and having a very deep suture: spire pointed, 

 shorter than the aperture, which is oval, and 

 almost cyclostomous, without any fold upon the 

 labium or columella. 



