ROEBUCK : THE BRITISH SLUG LIST. 39 



Arion ater var. rufa (L.). Animal red or brownish, unicolor- 

 ous (Moquin-Tandon). 



This form is probably of not unfrequent occur- 

 rence. The Rev. B. J. Clarke stated in 1840 that the 

 " brown variety " seemed to predominate at Killer- 

 eran, co. Galway. The Rev. J. McMurtrie informs 

 me that " brownish-red specimens " are not uncommon 

 in Scotland, as at Cumnock, Ayrshire, and Wishaw, 

 Lanarkshire, and Mr. C. Ashford has told me of 

 " light-red " examples occurring at Bettws-y-Coed in 

 1865. 



Arion ater var. succinea Miill. Animal yellowish, unicolor- 

 ous (Moquin-Tandon). 



The Rev. B. J. Clarke (1840) stated that in 

 Ireland he had never taken the " yellow variety " of 

 the full size, and in this respect my own experience 

 coincides. Yellow examples are not rare at Mean- 

 wood near Leeds, but generally small. 



Arion ater var. albolateralis v. nov. 



Animal black, sides and foot quite white, the two 

 colours being sharply defined ; foot with orange 

 fringe. 



Mr. C. Ashford found a specimen in 1865 at 

 Bettws-y-Coed in Carnarvonshire which does not 

 answer to any of the varieties described by Moquin 

 Tandon, and which he described as above. 



Arion ater van marginata Moq. 



Animal black, with border yellow, orange, or 

 ' rouge de minium ' (Moquin-Tandon). 



Mr. William Thompson in his catalogue of Irish 

 shells (1840) cited this variety as occurring commonly 

 in fields about Cremorne, co. Monaghan, on the 

 strength of a coloured drawing made by Mr. Temple- 

 ton in 1805. 



