224 



THE BRITISH NATURALIST. 



[■November 



B. hmulatum, Fourc, is the smallest and most abundant of the three ? 

 and is usually of a blacker colour than either of the other species ; it 

 has the punctured striae more conspicuous and the interstices more 

 convex. It is often found in much drier places than its allies, and is 

 common everywhere. 



I ought to mention that Bedel states that in B. iricolor the internal 

 striae are indicated to the apex of the elytra and that they are obsolete 

 at apex in B. lunulatum. As the striae do not appear to be constant in 

 this particular in either species I am not disposed to place much 

 reliance on this distinction, the comparatively broad interstices of 

 B. tricolor being, in my opinion, a much better character, judging from 

 the specimens before me. 



12, Churchill Road, Dartmouth Park, London, N.W., October 2, 1893. 



[It is highly probable that the foregoing three species will be found 

 mixed up in most of the British collections ; and, as the nomenclature 

 appears to be in a very confused state, it will be as well to adopt the 

 names laid down by Mr. Newbery in the above table. With regard 

 to the term hmulatum (Fourc), I see no reason for objecting to its 

 adoption, as it cannot possibly be confounded with B. lunatum, Duft. 

 — G.A.L.] 



THE MOLLUSCA OF NOTTINGHAMSHIRE. 



BY W. A. GAIN. 



(Continued from page 139.) 



TERRESTRIAL. 



Order PULMONATA. 

 Family ARIONID^E. 



Genus Arion, Fer. 



Arion empiricorum, Fer. i=A. atev, Aucc.) — Found everywhere. 



Vars. rufa, L., bmnnea, Rbk., and rubra, Moq. — These varieties are 

 common, I have recently found an example under a log in a wood at 

 Ossington, which I could not distinguish from an example of A. rufus 

 sent to me from France. 



Var. bicolor, Rbk. — I have taken this variety at East Markham. 



Var. plumbea, Rbk. — I have found an example which appears to 

 belong to this variety. 



Var. cinerea, Rbk. — Probably— var. cinerascens, Ckll. — Corporation 

 Gardens, Nottingham, Dodd. 



