194 



PROCEEDINGS OF THE ACADEMY OF 



[Apr., 



PRATICOLELLA. 



BY E. G. VANATTA. 



An examination of the anatomy of several United States land 

 mollusks, which were supposed to belong to the genus Polygyra, has 

 made it necessary to transfer them to the genus PraticoleUa. The 

 species may be distinguished as follows: 



PraticoleUa griseola (Pfr.). 



Helix griseola Pfr., Symb. Hist. Hel., I, p. 41 (1841). 



This is a white shell with spiral brown bands, a thin lip, and 

 obscure microscopic spiral striae upon the apex. The anatomy is 

 unknown. 



PraticoleUa berlandieriana (Moric). Fig. 1. 



Helix (Helocogena) berlandieriana Moric, Mem. Soc. Hist. Nat. Geneve, 

 VI, p. 537, pi. 1, fig. 1 (1833). 



A species similar in color and sculpture to the preceding, but with 

 a very thick lip. The genitalia (fig. 1) of a specimen in the collection 

 of The Academy of Natural Sciences, No. 76,209, from Victoria, 

 Tex., collected by Hon. J. D. Mitchell, has a very long, hollow, 

 finger-shaped, somewhat glandular appendix upon the penis. The 

 verge is shorter than in P. pachyloma Mke. The penis retractor is 



divided, so that the largest branch is united to the apex of the phallus 

 and two smaller branches are attached at the base of the penial 

 gland with the vas deferens passing between. The surface of the 

 interior of the verge is longitudinally plicate, while that of the 

 appendix is granular. The spermatheca bulb is oval. 



