1908.] NATURAL SCIENCES OF PHILADELPHIA. 43 



built forward, carrying the aperture free from the preceding whorl. 

 We have not seen this form; the specimens of hunana before us, while 

 agreeing with Gredler's description in other characters, do not have 

 the last whorl free in front, though the peristome is continuous. They 

 are like Pere Heude's figures of hunana. Dr. von Mollendorff has 

 unnecessarily altered the name hunana to hunanensis. 



We share with Gredler the opinion that Boysidia is a section or sub- 

 genus of Hypselostoma rather than a distinct genus. 



