JOURNAL OF CONCHOLOGY. 223 



Zonites radiatulus var. viridescenti-alba. — York- 

 shire appears to be very fortunate in the possession of habitats 

 for this rare variety, Mr. J. Whitwham having found it near 

 Huddersfield, and Mr. Wm. West at Shipley Glen near Bradford. 

 I am enabled to add Crossgates, near Leeds, where I found a 

 specimen during January of the present year. — Wm. Nelson, 

 June, 1884. 



New variety of Limax flavus. — This species appears — 

 so far as my observation goes — to be more constant in its colour 

 and markings than other slugs, for until now I have not seen 



any more variation than in the intensity of the yellow ground 



colour in adult individuals, and the preponderance of the dark 



markings which often obtains in very young examples. The 



range of this variation in the intensity of the yellow colour has 



never seemed to me to be worthy of any varietal names. I have 



however just received from Mr. C. J. Waterfall, of Bath, a 



couple of examples of the species found at that place, on the 



Great Oolite, at an altitude of 400 feet. One of these was 



typical, the yellow being more intense than usual ; the other 



was utterly devoid of yellow, the colour being a semi-transparent 



grey, not unlike some of the more opaque examples of Limax 



arboriuu. The markings and the blue tentacles were however 



sufficient to identify the species. I propose to characterize a new 



variety for this specimen, and to call it 



var. grisea agreeing with the type in every respect but 

 ground-colour, which is grey, utterly devoid of any trace of 

 yellow ; slime colourless. 



Along with these Mr. Waterfall sent me some small examples 



of typical Limax agrestis and numerous adults of the var. 



sylvaiica, with the markings pale ; a small orange-footed Arion 



hortensis war.fasciata ; and a full-grown light chocolate-coloured 



Arion ater var. rufa ; and a number of Helices and Zonites. — 



Wm. Denison Roebuck, Leeds, June 14th, 1884. 



