IV. — On the Genitalia and Lingual Dentition of Puhnonata. 



BY W. G. BINNEY. 



With Plates I-VI. 



Bead May 25th, 1874. 



It will be noticed that in the following descriptions of the 

 genital system, I have followed Dr. Leidy (Terr. Moll. U. 

 S., I) in applying the terms ovary and oviduct. I am aware 

 of other names being applied to the organs by other authors. 



I take this opportunity of strongly urging upon concholo- 

 gists the study of the genital system as a most reliable spe- 

 cific character, in the terrestrial Pulmonata. 



For the species extralimital to the United States, I am 

 indebted to my friend, Mr. Thomas Bland, as well as for their 

 identification. The most interesting of them were collected 

 by Prof. Orton, in his late journey in northern Peru. 



Limax flavus, Linn. 

 A few days since a colony of this species was discovered 

 by a friend in the cellar of his house in Burlington, N. J. 



