I» 



The Nautilus. 



Vol. XXI. JUNE, 1907. No. 2. 



A NEW POLYGYRA FROM NORTH CAROLINA (P. SOELNERI). 



BY JOHN B. HENDERSON. 



On a collecting trip to the coastal plain region of North Carolina 

 last autumn, with Mr. Soelner, of Washington, the following unde- 

 scribed Polygyra was found : 

 Polygyra soelneri n. sp. Plate III, figs. 1, 2. 



Shell globosely depressed ; spire low conoid, periphery rounded ; 

 perforate, the opening half covered by columellar lip. Surface very 

 glossy, closely, deeply and evenly ribbed throughout except on first 

 1^ whorls which are smooth. Whorls 5^, regularly increasing, the 

 last falling abruptly and shortly in front, having a pale spot at the 

 deflection. Narrowly and deeply contracted behind the lip. Aper- 

 ture oblique and irregularly crescentic. Lip reflexed with a flange- 

 like internal thickening which is widest basally and terminates short 

 of the columellar end of the lip. A rather long curved white par- 

 ietal tooth stands upon a hardly perceptible parietal film. Color 

 mahogany, with a glossy satin-like sheen ; lip purplish outwardly, 

 the inner flange buff. Alt. 7, greater diam. 11, lesser diam. 9^ mm. 



Habitat among cypress logs in a swampy region on the north shore 

 of Lake Waccamaw, North Carolina. 



This remarkably pretty little Polygyra, which is very distinct from 

 any other known species, might be included in the section Mesodon, 

 its nearest ally being P. ckristyi, from which, however, it differs in 

 being larger, less depressed and umbilicated. I take pleasure in 

 naming the species after Mr. Soelner, my enthusiastic companion in 

 the field when it was first found. 



