296 I'H()CEKI)IN(iS OF TflK ACADEMY OV [I'SVIO. 



NEW AND LITTLE KNOWN AMERICAN MOLLUSKS, NO. 3. 

 BY H. A. PILSBRY. 



In this third contribution toward a fuller knowledge of the niol- 

 lusk inhabitants of our American streams and woods, the more no- 

 table paragraphs are those describing a new and exceptionally large 

 Vaginulus from Bermuda, and the portion relating to the western 

 helicoid, Polygyrella Harfordiana. 



Bulimulus Eagsdalei, Pilsbry. (PI. V, fig. .'! ). 



This species was briefly described in the Proceedings for 1890, 

 page 63 ; notes on the circumstances of its finding are given in the 

 Nautilus for March, 1890, page 122. The specimen figured is rather 

 wider than most of those before me. Measurements of three speci- 

 mens are as follows : 



Alt. 20, diam. 11 mm. ; alt. of aperture 10 mm. 



Alt. 21, diam. 11 mm. ; alt. of aperture 10 mm. 



Alt. I62, diam. 8 mm. ; alt. of aperture 8 mm. 



Thus far, the species is known only from Cook and Montague 

 Counties, Northern Texas. Collected by Mr. G. H. Ragsdale, 

 of Gainesville, Texas. 

 Pupa syngenes, Pilsbry. (PI. V, figs. 1, 2). 



Shell sinistral, cylindrical but somewhat wider above, blunt at 

 each end ; light brown, whitish toward the apex ; surface shining, 

 delicately obliquely striate ; apex large, obtuse ; suture impressed ; 

 whorls 8, the last one compressed and flattened around the lower- 

 outer portion, its last third ascending on the next earlier whorl, and 

 elevated into a high rounded ridge or crest a short distance behind 

 the outer lip ; aperture slightly oblique, truncate-oval in form ; the 

 outer lip narrowly expanded, basal and columellar margins broader ; 

 about the middle of the parietal wall, or nearest the upper end, there 

 is a small parietal lamella ; far within there may be seen a blunt 

 columellar lamella ; and some specimens exhibit far within the outer 

 lip the trace of an inferior or lower palatal fold. 



Alt. 3], diam. IJ mm. 



Habitat, Arizona ; exact locality of the specimens before me not 

 known. 



I had at first considered this form as a variety of P. museorum. 

 It differs from that species in its sinistral convolution, in being 



