COLLINGE : THE BRITISH ARIONID^E : A REPLY. 85 



1890), from whom I received a living specimen. In the same 

 year Mr. F. G. Fenn brought me one alive from Echternach, 

 Luxembourg. The ordinary red-brown form in Britain is 

 Moquin-Tandon's var. vulgaris, which is generally considered 

 to be the Linnean rufus. This is also no doubt Kaleniczenko's 

 v. joustonii [sic], although the figure in Ferussac quoted in 

 connection with it represents lamarckii — at least in the copy at 

 the British Museum. It is to be noted that Linne (Syst. Nat., 

 Ed. xii. ) quotes a Listerian figure as representing his rufus, 

 although there is also a reference to the Fn. Suec. It is the 

 same in the ioth Ed., where Lister is also quoted under Limax 

 ater. However, if the Scandinavian slug is really distinct from 

 ours, the Linnean names must belong to it by preference. 

 L. albus, Linn., does not appear until the 12th ed., and is based 

 on a description by Miiller. Ferussac considered his A. albus 

 to be Midler's species ; and Moquin-Tandon's four varieties of 

 it are evidently based on Midler's descriptions. 



On page 61 there is a reference to the var. marginellus, 

 Schrenk. This is, I believe, the same as v. marginatus and 

 v. swammerdamii, and has long priority. 



Page 61. I certainly did not say that var. No. 9 was near v. hibernus. 

 Evidently the identifications of v. hibernus and v. aterrima have 

 got transposed. 



Page 62. I believe that Heynemann was the first to record Arion 

 subfuscus as a British species, in "Die nackten Landpulmonaten 

 des Erdbodens" (1885), p. 14. When it was first recognised in 

 Britain, I wrote to Dr. Heynemann about it, and he informed 

 me that for some time he had been aware that it existed with us. 



Page 63. Why is Arion hortensis of Jeffreys put down as a synonym 

 of A. intermedins} It is Jeffreys' A.flavus {Brit. Conch., vol. v, 

 p. 153) that is identical with intermedins. 



Page 66. Ario?i hortensis var. leucophcea is almost certainly identical 

 with Arion circumscriptus. The name has priority over 

 bourguignati and dupuyanus. 



THE BRITISH ARIONID/E : A REPLY. 



By WALTER E. COLLINGE, 



Mason College, Birmingham. 



I have to thank Mr. Cockerell for his kindly expressed criticism — 

 for his paper is hardly a series of corrections, as I will endeavour to 

 show, and to substantiate what I have written. 



