[Extracted from the Proceedings of the Academy of Natural Sciences of Philadelphia, 

 March 31, 1874.] 



ON THE ANATOMY AND LINGUAL DENTITION OF ARIOLIMAX AND 

 OTHER PULMONATA. 



BY W. G. BINNEY. 



I have already, in connection with my friend Mr. T. Bland, 

 given a description of the external chavsicters of Ariolimax (Ann. 

 N. Y. Lye, N. H. X. 297, 1873). I now propose to describe 

 such of its internal organs as I have been able to study. 



I have examined one specimen of Ariolimax 7iiger, J. G. Coop., 

 presei'ved in spirit, belonging to the state collection of California, 

 labelled and presented by Dr. Cooper, and in all respects an au- 

 thentic type. Agreeing with this type I have other specimens 

 from various California localities, so that I believe the species to 

 be well established and generally distributed along the coast of 

 California. 



From the Museum of Comparative Zoology at Cambridge, Mr. 

 Anthony has sent me a specimen, long preserved in alcohol, 

 marked from San Mateo, California. For reasons given below, I 

 am inclined to consider this the form described by Dr. Cooper as 

 A. Californicus. I have had the opportunity of examining 

 another specimen of this form, received from Mr. Stearns, who 

 collected it near San Francisco. 



From Mr. Henry Hemphill I have received % specimen from 

 San Mateo Co., California, which presents most decided specific 

 differences from the last-mentioned form, especially in its geni- 

 talia. Having considered the last-mentioned form as A. Califor- 

 nicus, I am forced to consider this as A. Columbianiis, the only 

 remaining described species. It must be borne in mind, however, 

 that I have never compared it with specimens from more northern 

 regions, whence the species was originally described. The large 

 number of specimens formerly preserved in the Smithsonian, tabu- 

 lated in Land and Fr. w. Shells, Part I. p. 281, were destroyed at 

 the fire in Chicago, and I have been unable to obtain elsewhere 

 any specimens from Oregon or Washington Territory, which I 

 can refer to the true Cohimbianus. 



In treating these various forms, I have abstained from giving 

 anjr description of their exterior markings. Such description 

 would be unreliable, as the specimens have been long preserved ii% 

 3 



