146 JOURNAL OF CONCHOLOGY. 



New variety of Arion ater. — On the 6th of August of 

 this year Mr. W. Eagle Clarke, who was walking with me from 

 Otley to Pool, picked up on the high road near the latter place 

 a fine full-grown specimen which in colouration does not agree 

 with any of the varieties described by Moquin-Tandon, and 

 which I therefore propose to call 



Arion ater var. plumbea var. nov., 

 and which may be characterized as follows : — Animal uniform 

 lead colour, paler towards the foot ; margin of foot dull yellow. 

 This new variety approaches more nearly to Moquin-Tandon's 

 var. nigrescens than to any other. It is described as being 

 uniformly blackish, a colour which does not apply to my speci- 

 men, and I cannot find that the lead coloured specimens have 

 been named. I am indebted to Mr. Clarke for the suggestion 

 of the name as well as for the specimen. — W. D. Roebuck, 

 Aug. 29th, 1883. 



Limnaea palustris monst. carinatum n. m. (PI. i., fig. 6). 

 Shell with a very strong keel, spire slender and pointed. 

 Length 11 mill., breadth 7 mill. ; apert. length 5 mill,, 

 breadth 5 mill. 



This very peculiar shell has been found by Mr. 

 S. C. Cockerell, of Chislehurst, in a pond near 

 Bromley, with the type and L. peregra. The pond 

 is almost dried up in the summer time, and there 

 appears to be no water plant in it, but plenty of grass. 



The specimen is finely obliquely striated, and 

 appears of a very dark brown colour from the incrus- 

 tation with which it is covered. The first 3 whorls 

 appear normal, being somewhat convex as usual, but 

 afterwards a tendency to compression is noticed, 

 which greatly intensifies, until in the last whorl 

 formed it appears almost hollowed just before its 

 expansion to the keel. — John W, Taylor, Sep. 21st, 

 1883. 



J.C, iv., Jan., 1884. 



