CANARIAN GROUP. 321 



Helix cellaria et canarise, Pfeiff., Mon. Hel. vii. 144, 178 



(1876) 



Habitat Canariam Grandem, Teneriffam, et Hierro ; sub 

 lapidibus, prsecipue in cultis. 



As in the Madeiran and Azorean archipelagos (and even as 

 at St. Helena), the common European H. cellaria has estab- 

 lished itself in the Canaries, — where it is locally rather 

 abundant, for the most part within the cultivated districts, but 

 likewise in sylvan spots of an intermediate altitude. It was 

 taken by Mr. Lowe and myself throughout the region of El 

 Monte in Grand Canary, at Las Mercedes and near Garachico 

 and Ycocl el Alto in Teneriffe, and on the western side of 

 Hierro ; and Grand-Canarian specimens are now before me 

 which were met with by Mr. Watson. 



The examples of this Hyalina from Grand Canary have 

 been described by Mousson (I. c. 16. pi. 1. 16-18), under the 

 name H. canarice, as specifically distinct ; but I am totally un- 

 able to detect any tiling about them to warrant their separation. 

 Their spire is a little less depressed and their umbilicus just 

 perceptibly wider, and perhaps also (though I am not at all 

 sure about this) their ultimate volution is a trifle more broadly 

 developed ; but each of these characters are barely appreciable, 

 and are easily matched (as it seems to me) in selected 

 individuals from the other islands of the Group ; so that I can 

 scarcely regard the Grand-Canarian ones as representing even 

 a decided ' variety ' (and, therefore, a fortiori, a species),— 

 though, out of deference to Mousson, I will cite them as, at all 

 events, the ' ft. canarice.'' 



Hyalina vermiculiim. 



Helix vermiculum, Lotve, Ann. Nat. Hist. vii. 104 (1861) 



„ „ Pfeiff., Mon. Hel. v. 109 (1868) 



Hyalina vermiculum, Mouss., Faun. Mai. des Can. 18. pi. 



1. f. 25-27 (1872) 

 Helix vermiculum, Pfeiff., Mon. Hel. vii. 112 (1876) 



Habitat Teneriffam ; in aridis calcareis inter Portum 

 OrotavaB et Eealejo, necnon mox supra illud, sub lapidibus sat 

 vulgaris. 



Although partaking more, in its general proportions and 

 contour, of the H. cellaria, this little Hyalina is in some 

 respects intermediate between that species and the H. crystal- 

 Una. Indeed in its comparatively small size, and in its white, 

 hyaline, transparent surface it has more in common at first 

 sight with the latter ; nevertheless the form of its under-portion, 

 which slopes off gradually into the umbilicus, at once removes 



Y 



