Qiuiiteiiy Journal of Conchology. igi 



Helix ( Triodopsis ) Van Nostrandi, Bland. Found at Aiken, South 

 Carolina, it is nearly allied in form and and character of 

 aperture to Helix introferens. It conects introferens and 

 vultuosa with, but is quite distinct ixonx fallax. 



Notes on American Land Shells and other Miscell- 

 aneous Conchological Contributions.— By W. G. Binney. 



Reprinted from the Proc. Acad. Nat. Sci. of Philadelphia, U. S., 

 vol. 2, part 3, pp. 140 — 254 and 21 plates. 



The first portion of this highly interesting and important paper 

 is devoted to the consideration of the jaws and lingual membranes 

 of the Terrestrial Pulmonates of North America and embodies the 

 results of Mr. Binney's labors during the last 30 years in this 

 department, in which he has gained such great celebrity. 



The best methods of procedure to extract the jaw and lingual 

 membrane from the animal with the least trouble and without injury 

 to its most delicate portions is given in full detail and the position 

 and mode of action of these organs clearly pointed out. 



Mr. Binney thinks that the two organs considered in conjunction 

 furnish a good basis for classification, and from the results of an 

 examination of a number of American and foreign species of Ter- 

 restrial Pulmonata, he divides the whole series of known species into 

 two great divisions, characterized by the absence or presenceof a jaw. 

 The following genera belong to the first great division, they being 

 deficient of that organ: Testacella, Daudebardia, Streptaxis, Rhytida, 

 Diplomphalus, Glandina, Streptostyla, Strepstostele, Gonospira and 

 Enn€a, all of which are also deficient of lateral teeth, some 

 genera being without centrals, but all have aculeate marginal teeth. 

 The following genera of which the dentition is not actually known 

 are also placed in the first division : Strebelia, Petenia, Spiraxis 

 Ravenia, Coeliaxis, and Gibbiis. 



The genera Onchidium, Onchidella, Peronia, and perhaps Btichan- 

 ania also form a group of the first division, characterized by their 



