NATURAL SCIENCES OF PHILADELPHIA. 33 



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 characters of Ariolimax (Ann. 

 N. Y. Lye, N. H. X. 297, 1873). 1 now propose to describe 

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



I have examined one specimen of Ariolimax niger^J. G. Coop., 

 preserved 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 a 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. Columbianus, 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 AVashington Territory, which I 

 can refer to the true Columhianus. 



In treating these various forms, I have abstained from giving 

 any description of their exterior markings. Such description 

 would be unreliable, as the specimens have been long preserved in 



