4° ROEBUCK : THE BRITISH SLUG LIST. 



Anion ater var. albida v. nov. Animal entirely white. 



The Rev. J. McMurtrie writes me that at the 

 beginning of June last he found a full-grown pure 

 white specimen of A. ater at Ambleside, Westmore- 

 land. 



Arion flavus. This is a form which requires investigation. 

 Some of the continental authorities do not seem to 

 recognize its claim to specific rank ; as for instance, 

 A. W. Malm, who, in his ' Skandinaviska Land- 

 sniglar,' gives A. flavus of Forbes and Hanley as a 

 young example of the Continental Arion fuscus, and 

 A. flavus of Nilsson and Von Martens he considers 

 to be the young of A. ater. 



I suspect some of the examples reported in local 

 lists may be merely the yellow varieties of the other 

 British species of Arion. 



Arion hortensis var. rufescens Moq. Animal reddish with 

 black bands (Moquin-Tandon). 



A specimen was sent to me in May, 1883, from 

 Ripon, by my friend Mr. A. E. Ebdell. 



Genus Amalia. 



This genus, which includes two British species, 

 A. gagates and A. niarginata, is readily distinguish- 

 able from Limax by its back being keeled through- 

 out its length, by the shield being granulated or sha- 

 greened and not striated, by the shell being equilateral, 

 and by the penis-sheath being composed of two dis- 

 tinct parts, an upper cylindrical one, and a globular 

 one near the genital orifice. The latter is the anatomi- 

 cal character assigned to the genus by Sordelli, in his 

 ' Anatomia del Limax Dorise Bourg., nei suoi rapporti 

 con altre specie congener! ' (1870). 



J.C, iv., April, 1883 



