86 LAND AND FRESH- WATER SHELLS OP N. A. [PART IL 



•white, the interior within the throat acute, red, showing a band without. 

 Length G^, breadth 4 lines. 

 Hub. Goshen, Mass. (Menke.) 



Phtjsa suharata. — Shell ovate, pellucid, ashy horn-color ; last whirl ven-. 

 tricose, somewhat furrowed transversely ; spire short, acute ; labrum 

 thickened within. Length 5, breadth 3 lines. 



Ilah. Near Cincinnati in the Ohio River. {Menke.) 



Not having seen autbentic specimens of the following species, 

 my opinion of their identity with Physa heterostroj^ha is based 

 on a study of the original descriptions and figures here copied. 



Physa cyJindrica, Newcomb. — Shell remarkably solid, sinistral, cylindri- 

 cal. Whirls four, rapidly diminishing to the sub-acute apex. Surface 

 moderately smooth, and polished witii incremental lines. 

 Suture impressed ; outer lip with a sinuous margin, nearly 

 straight, forming an acute angle with the body, effuse beneath ; 

 body whirl not convex, but rather flattened and cylindrical. 

 Aperture narrow above, moderately dilated and elongated be- 

 neath. Columella smooth, arched with a conspicuous callus 

 reflected over the umbilicus. Light rusty, or opaque rusty 

 white ; outer lip with a rusty sub-margin within. Length 

 0.5, of aperture 0.35. 



This specimen was communicated by Dr. Newcomb, who 

 obtained it from Red Creek, Wayne County. I have received the same 

 shell under the name of P. elliptka, Lea; but it does not agree with his 

 description. {DeKay.) 



Physa aurea, Lea. — Shell sinister, rather inflated ; golden color, pellucid, 



shining ; spire rather short ; whirls four ; outer lip margined ; aperture 



somewhat inflated. 



Fig. 148. Habitat. Hot Spring, Bath County, Virginia : P. H. Nick- 



lin. My cabinet, and cabinet of P. H. Kicklin. Diam. .3, 



length .5 inch. 



Mr. Nicklin informed me that he found the Physa aurea in 

 a little watercourse by which a hot and a cold spring dis- 

 Physa aurea. charge their mingled waters. The former exhibits a tempera- 

 ture of lOlJO and the latter of about 560 of the scale of 

 Fahrenheit. Near the meeting of the waters, one side of the little stream 

 is cold and the other side hot ; and multitudes of these beautiful Physa. 

 are to be found on both sides of the line of junction, availing themselves 

 of the power which the locality aflbrds them of changing their climate 

 according to their fancy. (Lea.) 



Physa plicata, DeKay. — Shell moderately solid, subovate, elongate, sym- 

 metrical. Whirls four to five, rapidly attenuated to the apex. Surface 

 with equidistant, longitudinal, and obsolete inequidistant transverse raised 



