4 THE NAUTILUS. 



1915. A single specimen was found near Cave Spring, Floyd 

 Co. Ga. about 20 miles N. E. of the Alabama locality. Types 

 no. 7871 of my collection. Paratypes in collections of Academy 

 of Nat. Sci., Philadelphia, Alabama Museum of Natural Hist., 

 and cabinet of Dr. Bryant Walker. 



Polygyra brevipila, cherokeensis and cohuttetwis form an interest- 

 ing and very natural group, differing from stenotrema, hirsuta and 

 their allies by the continuous free lip and the shape of the lip 

 notch. Other common characters are the fine, closely-set hairs 

 and very convex, rounded body whorl. The fulcrum is long. 

 The known localities are all in the southern extension of the 

 Allegheny mountain range, from N. W. Georgia to central 

 Alabama. All the species occur in wooded but rather dry 

 ravines on mountain sides, and they commonly conceal them- 

 selves by clinging to the lower sides of stones. Polygyra brevi- 

 pila was collected in such a ravine, about 2000 ft. above sea 

 level ; cohuttensis at about 1500 ft. ; and cherokeensis at 1200 ft. 



GONIOBASIS IN WESTERN PENNSYLVANIA. 



BY H. A. PILSBRY. 



GONIOBASIS PENNSYLVANIA n. sp. 



The shell is oblong-conic, rather solid, smooth ; periostracum 

 strong and persistent, of a buffy citrine color. The spire is 

 conic, with straight or slightly convex outlines, and is more or 

 less eroded, the erosion beginning at an early age. The young 

 up to a length of about 6 or 7 mm. are acutely carinate periph- 

 erally, the carina appearing as a welt or seam immediately above 

 the suture on the spire ; after which the periphery becomes 

 merely convex or somewhat flattened. The last whorl is large, 

 tapering downward. Aperture more than half the total length, 

 ovate ; outer lip very slightly sinuous, almost straight in pro- 

 file view. Parietal callus rather thin. 



Length 16.5, diam. 10, length aperture 10 mm. 



Length 16, diam. 8.3, length aperture 9 mm. 



