CANARIAN GROUP. 317 



Habitat Canariam Grandem, Teneriffam, et Palmam ; bine 

 inde (praesertim in Can aria Grandi) sub lapidibus. 



According to my own experience, this Vitrina is essentially 

 characteristic of Grand Canary, in which island it was taken by 

 Mr. Lowe and myself, not uncommonly, and more sparingly by 

 Mr. Watson. It is however recorded by Mousson to have been 

 obtained by Blauner (who met with a single example of it) 

 in Teneriffe, and by Fritsch in Palma. 



Although in its size, form, and hue it bears a considerable 

 resemblance at first sight to the latebasis, the V. Blauneri is 

 nevertheless a very distinct species, its shell (which is muijh 

 depressed, though without any minute costse at the nucleus) 

 being a trifle more solid, and somewhat less transparent, than 

 in the other Vitrinas, with the aperture proportionally smaller, 

 and the lower lip of the peristome almost free from any 

 appearance of lateral membrane, but dilated at its insertion 

 into a small but appreciable lamella which covers the place of 

 the umbilicus, and which is continued (as a just perceptible 

 thickening) across the body-volution to the insertion of the 

 upper lip. In which last-mentioned characters it recedes, ac- 

 cording to Mousson, from the true Vitrinas, and makes a 

 slight approach towards the perforated Daudebardias. 1 



Fam. 4. HELICIDJE. 

 Genus 6. HYALINA, Gray. 



( Lyra, Mousson.) 



Hyalina circumsessa. 



Helix circumsessa, ShuttL, Bern. Mitth. 139 (1852) 

 Pfdff., Mon. Hel. iii. 102 (1853) 



Patula circumsessa, Mouss., Faun. Mai. des Can. 26 



(1872) 



Helix circumsessa, Pfei/., Mon. Hel. vii. 173 (1876) 

 Habitat Teneriffam et Palmam, prsecipue illam ; in sylva- 

 ticis intermediis vulgaris, sed quoque in locis etiam inferioribus 

 minus frequens. 



1 I may just state that I reject altogether the V. fasciolata, Fer., from the 

 Canarian fauna, being founded (as it seems to me) on insufficient evidence as 

 regards its habitat. It belongs to a type totally distinct from anything 

 which has hitherto been observed in these Atlantic islands ; and there is 

 abundant reason for suspecting that the older naturalists who cited it as 

 Teneriffan fell into some error concerning the country from whence it had 

 been brought. * Cette espece,' says Mousson, ' fort remarquable par ses 

 fascies insolites, provient des premiers naturalistes, qui ont visite les Cana 

 ries et dont les indications de patrie ne sont pas tou jours certaines. Comme 

 aucun voyageur ne 1'a depuis retrouvee, il est permis de suivre 1'exemple de 

 MM. Webb et Berthelot et de douter de son existence dans les Canaries ' 

 (?. c. 15.) 



