CANARIAN GROUP. 361 



often altogether imperceptible ; its oblique transverse lines are 

 equally light and irregular (being, moreover, slightly undulated 

 about the dorsal region, so as to give that part an obsoletely 

 submalleated appearance) ; and its suture (as in that species) 

 is often edged with an extremely narrow yellowish-white 

 marginal line. 



It is not altogether impossible that this Helix may prove 

 eventually to be the true H. Maugeana of Shuttleworth (Bern. 

 Mitth. Diagn. 292 ; 1852). At any rate what he believed to be 

 Shuttleworth's actual type (in the collection of the late Mr. 

 Cuming) was examined by Mr. Lowe, who declared it to be 

 specifically identical with the Valverde shell. Still, as the 

 diagnosis of the H. Maugeana does not sufficiently tally with 

 the H. hierroensis, there is a difficulty about adopting Shuttle- 

 worth's title, and disturbing the synonymy as above quoted. 



Helix Perraudieri. 



Helix Perraudieri, Grasset, Journ. de Conch, v. 345. t. 13. 



f. 2 (1856) 



Pfei/., Mon. Hel. iv. 232 (1859) 

 Mouss., Faun. Mai. des Can. 100 



(1872) 



Habitat Hierro ; mihi non obvia. Collegit cl. Grasset. 



The H. Perraudieri is a species which was found by M. 

 Grasset in Hierro, but one which I have not myself had an 

 opportunity of inspecting. It seems also to have been un- 

 known to Mousson (except by the figure and published 

 diagnosis), who nevertheless appeared satisfied as to its close 

 affinity with the H. hierroensis. Judging from the description 

 of M. Grasset, it is more depressed than the latter, as well as 

 regularly and minutely malleated, and free from the granula- 

 tions which give so marked a character to that species ; but in 

 point of size the two do not, apparently, greatly differ. 



Helix distensa. 



Helix distensa, Mouss., Faun. Mai. des Can. 100. pi. 5. f. 



20, 21 (1872) 

 Pfeiff., Mon. Hel. vii. 349 (1876) 



Habitat Gomeram. Invenit cl. Fritsch* 



A Gomeran Helix, detected by Fritsch, which is apparently 

 a good deal allied to the H. Perraudieri, Grasset, from Hierro ; 

 but, according to Mousson (for I have not been able to inspect 

 a type), elle est plus globuleuse ; le dernier tour est arrondi, 

 bien qu'un peu deprime vers Tangle dorsal de 1'ouverture, la 



