256 



PROCEEDINGS OF THE ACADEMY OF 



[Mch., 



Up to this time, no carinate or even strongly angular species have been 

 found. Such uniformity in the shell is unusual in a Helicicl genus. 



The characters of the soft anatomy originally attributed to the genus 

 have proved to prevail in the more extensive material now examined, 

 except that in one species the fiagellum is obsolete. The penis was 

 incorrectly described in my original diagnosis, through my failure to 

 open it, and thus ascertain the exact limits of penis and epiphallus. 



Measurements of the Genitalia in Millimeters. 



Helix remondi Tryon belongs to another genus, still uncharacterized 

 anatomically, of the Belogona Euadenia. A living specimen sent me 

 by mail some years ago was crushed en route, partially decayed and 

 dried hard when it reached me. I soaked up the remains, and found 

 that the tail has a strong serrate keel above ; there is a slender, cylin- 

 dric-fusiform penis, but the rest of the genitalia were impossible to 

 make out. The radula does not differ materially from the Epiphrag- 

 mophora type. In Mexico, the genus Lysinoe and at least one species 

 of Leptarionta have the same extremely uniLsual structm-e of the tail. 



