CANADIAN GROUP. 385 



habitat, one cannot but regret that material so meagre and un- 

 satisfactory should have been made use of to augment an island 

 fauna in which the most perfect accuracy as regards the several 

 areas of distribution is of primary importance. Still, having 

 been once admitted and described, it cannot be subsequently 

 ignored. 



Judging from Mousson's diagnosis and figure, I cannot per- 

 ceive that the H. lanosa differs materially from the leprosa, 

 Shuttl., and more particularly so, since the ' granules claires,' 

 on the absence of which he depends for one of its main dis- 

 tinctions from the latter, are to me scarcely (if at all) recog- 

 nizable in any of the specimens of even the true leprosa which 

 I have yet examined. Neither can I acknowledge the great 

 affinity of either of these species (so-called) with the Madeiran 

 H. actinophora. The remarks of Mousson on the H. lanosa 

 are as follows : 6 Je n'ai vu qu'un individu de cette espece, que 

 je dois a la bonte de M. Tarnier, mais sans indication precise de 

 localite. Elle differe de la leprosa, dont elle partage assez la 

 forme, par V absence de granules claires et par la presence dun 

 duvet de filaments laineux, bien que courts, places sur les dos 

 des stries. Les premiers tours, ainsi que le milieu de la base, 

 sont depourvus de filaments. La petitesse, la tenuite, le faible 

 developpement du bord, I'ab&ence d'ombilic penetrant, la pilosite 

 differente, etc., la separent du groupe de la //. hispidula et la 

 rangent dans le groupe voisin des H. ciliata, Ven M et actino* 

 phora, Lowe.' 



Helix pavida. 



Helix nubigena, Lowe [nee Saulcy, 1852], Ann. Nat* Hist* 



vii. 105 (1861) 



Pfeiff., Mon. Hel. v. 179 (1868) 



Mouss., Faun. Mai. des Can. 56* pi. 3* 



f. 22-24(1872) 



pavida, Mouss., I. c. 56 (1872) 



et nubigena, Pfeiff., Mon< Hel. vii. 197, 278 



(1876) 



Habitat Teneriffam, et Palmam ; sub foliis ramulisque Re-* 

 tama3 (i. e. Spartium nubigena) in locis valde elevatis a meipso 

 lecta. 



The insignificant little H. nubigena, Lowe (which I have 

 been compelled to cite under Mousson 's subsequent name of 

 pavida, 'nubigena' having been pre-occupied in 1852 for a 

 Helix from the Pyrenees), appears to have been found hitherto 

 only by myself, first, at a high elevation in Palma, and after- 

 wards at a still higher one in Teneriffe. It was on the Cumbre, 

 of the former island, above Buenavista (some 6,000 feet above 



c c 



