MUSEUM OF COMPARATIVE ZOOLOGY. 43 
The animal extends itself into a long cylindrical worm-like body, with ob-, 
tuse ends. Length when fully extended, 60 mm. 
The synonymy of this species is as follows : — 
Arion Andersoni, J. G. Coop., formerly Prophysaon Hemphilli, var., W. G. B., 
Te MeV. 
Prophysaon Andersoni, J. G. C., in letters. 
Ariolimax Columbianus, Gout. 
Ariolimax Californicus, J. G. Coop. 
Ariolimax niger, J. G. Coop. 
Ariolimax Hemphilli, W. G. B. 
Ariolimax Andersoni, W. G. B. 
Formerly I supposed this species to be Arion Andersoni, of Dr. Cooper. 
Learning that Dr. Cooper’s species is a Prophysaon, I still retain for this the 
specific name Anderson, W. G. B. 
Arion foliolatus, Gup. 
Still a doubtful species, known only by the original figure and description. 
Binneya notabilis, J. G. Coop. 
Also found by Mr. Orcutt fifty miles from St. Quentin Bay, Lower 
California. 
Hemphillia glandulosa, Bu. & Brinn. 
Patula striatella, Antu. 
Mariposa, California. 
Patula pauper, Mor. 
Patula asteriscus, Morse. 
Tacoma, W. Territory. 
Patula solitaria, Say. 
i Plate I. Fig. 10. 
This can hardly be considered a species of the Pacific Province, though colo- 
nies have been found west of the Cascades. (See pp. 27, 28.) 
The specimen figured was found by Mr. Hemphill at White Bird Creek, 
Salmon River, Idaho. 
Microphysa Lansingi, Bianp. 
Microphysa pygmea, Drar. 
See p. 35. 
