222 MR. T. D. A. COCKERELL ON THE [Apr. 7, 



forms of considerable size, is found along the Pacific coast of the 

 United States and in British Columbia, while a subspecies of A. cali- 

 fornicus occurs even so far south as Costa Rica. Prophysaon has a 

 somewhat similar distribution, but does not go into Central America ; 

 it has its strongest development in the State of Washington, and 

 goes inland as far as Idaho. 



Anadenulus, a monotypic genus allied to Anadenus, is confined to 

 Southern California, 



Binneyince. 



This subfamily is proposed for certain slug-like genera, resembling 

 the HelicarionincB outwardly, but having the jaw and dentition of 

 Arionince. Binneya, J. G. Coop. { = Xanthonyx, Cr. & F.), maybe 

 taken as the type. It is found in Mexico and on Santa Barbara Island, 

 off the coast of California. Mr. W. G. Binney sent me a shell of 

 B. notabilis from the latter locality. Cry ptostr aeon, W. G. Binn., 

 from Costa Rica, and Hempliillia, Bl. &, Binn., from the N.W. 

 United. States, both monotypic genera, may also be conveniently 

 referred here, and also Peltella from Brazil, with the allied or identical 

 West-Indian genus Goeotis, Shuttl. Curiously, also, the genus 

 Otoconcha, Hutton, from North Island, New Zealand, has all the 

 characters of this subfamily, nor is this the only resemblance between 

 the Mollusca of Western North America and New Zealand. 



Oopeltince. 



Contains only the genus Oopelta, Morch, in Heynem., from the 

 Guinea and Cape of Good Hope regions. I have never seen the 

 type species, O. nigropunctata^ but I refer the "Arion" aterrimus, 

 Gray, contained in the British Museum, to this genus. 



LiBiACiDiE. — Limacince. 



(1) LiMAX, auctt. — This genus, as restricted by modern authors, 

 is indigenous only in the Western Paisearctic or European region. 

 It is true that many species of Limax have been described from 

 distant regions, but in every case, so far as can be ascertained, they 

 are either European species introduced (thus L.fiavus received two 

 synonyms in Australia) or they do not belong to Limax at all. The 

 most typical form of Limax has its greatest development in Northern 

 Italy, and consists of numerous species or subspecies allied to L. 

 maximus, L., and i. dnereoniger. Wolf. Allied to these is L. fiavus, 

 L., which has become almost cosmopolitan through its introduction 

 into various countries by human means. Thus, the British Museum 

 contains examples of this species from Rarotonga and the New 

 Hebrides {Bev. Wyatt Gill), St. Helena (/. C. Melliss), Sydney 

 {'Challenger' Coll.), Savannah, United States {W. G. Binney), and 

 I have received it from Washington, U.S.A. {Br. R. E. C. Stearns), 

 Lexington, Virginia {Prof. J. H. Morrison), and Burlington, New 

 Jersey (?F. G. Binney). Another subgroup {Lehmannia, Heyn.) 

 has its type in L. marginatus, Miill., a species widely distributed in 



