CHIEFLY OF THE UNITED STATES. 165 



Remarhs. — A single specimen only was received from my brother some years 

 since. It probably has its full growth, as there are two bands within the aperture. 

 It is a very well marked species, having a larger and more contorted fold on the 

 columella than I have seen in any other species. This fold is so much turned at the 

 base that on looking into the base the interior whorls may be seen, and a bristle may 

 be run through to the apex. In outline it is near to elliptica and HUdrethiana, 

 (nobis,) but the large fold distinguishes it at once. The aperture is nearly three- 

 fourths the length of the shell. It is very diflferent from the variety of ancillaria, 

 Say, which Mr. Haldeman describes and figures as having " a very deep fold." 



Phtsa Halei. pi. 24, fig. 83. 



Testa late ovata, inflata, diapliana, tenui, albida; spira obtusa; suturis impressis ; anfractibus quinis, 

 ultimo grand! ; apertura rotuadata ; labro regularlter expanse, subter marginem albo et incrassato ; 

 columella medio incrassata, impressa et plica induta. 



Shell broadly oval, inflated, semi-transparent, thin, whitish ; spire obtuse ; sutures 

 impressed ; whorls five, the last large ; aperture rounded ; outer lip regularly ex- 

 panded, white and thickened within the margin ; columella thickened and impressed 

 in the middle, and furnished with a fold. 



Proc. Acad. Nat. Soi. 1864, p. 114. 



Sab. — Alexandria, Louisiana, J. Hale, M. D. 



My cabinet. 

 Diam. -SS, Length '55 inches. 



Remarhs. — About a dozen specimens were sent to me some years since by Dr. 

 Hale. It is a regular symmetrical species, with a small white thickened border, and 

 is rather less in size than heterostropha, Say. It need not be confounded with any 

 other species with which I am acquainted. Its whiteness and regular swelling whorl 

 gives it the appearance of a blister. The aperture is about three-tenths the length 

 of the shell. I have pleasure in naming it after Dr. Hale, who has sent me many 

 interesting specimens of fresh-water and land shells. 



Physa Hawnii. PL 24, fig. 84. 



Testa fusiformi, subcompressa, erassa, albida ; spira exserta, subobtusa; suturis impressis, ultimo infleeto ; 

 anfractibus senis, convexis, ultimo grandi; labro parum expanso, subter marginem incrassato et rufo- 

 fuscescente ; columella valde incrassata, vix plioata. 



Shell fusiform, somewhat compressed, thick, whitish ; spire exserted, rather obtuse ; 

 sutures impressed, the last one bent down ; whorls six, convex, the last one large ; 

 outer lip somewhat expanded, thickened under the margin and reddish brown ; 

 columella very much thickened and scarcely folded. 

 Proc. Acad. Nat. Sci., 1864, p. 115. 



42 



