82 



THE BRITISH NATURALIST. 



[April 



H. nemoralis form hybrida, Poiret. I include this in the list, as 

 Prof. Morrison informs me he has found forms referable to roseolabiata- 

 bimarginata of two different band-formulae at Lexington. Hyhrida may 

 be considered to include all those shells in which the lip is pale 

 (pinkish or brownish) instead of black. 



H. nemoralis form nilssonia, Moq.--=libellula (123)45. Lexington, Va. 

 (Prof. j. H. Morrison in lift. Nov. 16, 1889). 



H. nemoralis var. major, Fer. . Shell larger. Two sent by Prof. 

 Morrison from Lexington, with max. diam. 28-^ and 26f mill, 

 respectively. 



H. nemoralis form albescens, Moq. Prof. Morrison sent a shell from 

 Lexington which may be referred here, being very pale yellow, like 

 var. S2ibalbida Locard of H. hovtensis. 



H. nemoralis form richardia, Moq.=petiveria (12345). Lexington, 

 Va. (J. H. Morrison). 



H. appressa form sinistrorsa. Shell reversed. Man. Amer. Land 

 Shells, p. 288. 



H. albolabris form alba. Clear greenish-white. Toronto, Canada 

 (D. B. Cockerell). I received one specimen of this pretty variety, 

 max. diam. 28 mill., from my brother. 



Stenogyra decollata. In Man. Amer. Land Shells, p. 458, the non- 

 existence of a specimen of mature age with an entire spire is commented 

 upon. Certainly such is exceeding rare, but a form integra Ancey has 

 been recorded, with an entire spire of about 12 whorls. This, however, 

 is not American. 



An Addition to the Fresh-Water Mollusca of the British 

 Islands. — Planorbis riparius, West. An announcement appears in the 

 " Irish Naturalist " of the discovery of the above species by Mr. J. N. 

 Milne at Inch, near the shore of Lough Swilly. Dr. R. F. Scharff, 

 by whom it was identified, tells us that it was recorded from North 

 Germany, Sweden, and Siberia. He describes the shell as follows : 

 " Shell very much flattened, finely striated, three to three and a half 

 whorls, all whorls being visible ; breadth 3 — 3^- mm. Its very wide 

 umbilicus distinguishes it at once from PI. fontamis and PL nitidus. In 

 general .appearance, indeed, it is more like a large PI. crista L., but 

 there is no trace of the ridges on the whorls which are so characteristic 

 of that species." 



A Slug Plague in Jamaica. — Mr. T. D. A. Cockerell has sent 

 us a copy of a very interesting article which he has written on the 

 above subject. It appears that the coffee trees are this year being 

 greatly damaged by the ravages of a slug — Veronicella sloanii, Cuvier- — 

 which has not appeared in such numbers for something like twenty 

 years. The planters find that the best plan of reducing the numbers 



