CANARIAN GROUP. 471 



to distinguish it, I will merely add his own remarks. ' Cette 

 seconde espece, que M. Shuttleworth a nominee sans la decrire, 

 et qui n'a ete trouvee par M. Blauner, differe essentiellement 

 du striatus. Elle est bien plus petite, relativement plus elevee 

 que le striatus ; le sommet surplombe un peu la base, et sa 

 pointe se trouve a moitie hauteur ; Fouverture se rapproche 

 plus du cercle; enfin on ne remarque que d'inegales stries 

 d'accroisement, sans nulle trace des stries longitudinales carac- 

 teristiques. Presque tous les individus sont forternent corrodes 

 a partir du sommet.'' 



The A. rupicola would seem to have been found by Blauner 

 at Guimar in Teneriffe. 



Sectio II. OPERCULATA. 

 Fam. 7. CYCLOSTOMATIDJE. 

 Genus 20. CYCLOSTOMA, Montf. 



Cyclostoma elegans. 



Nerita elegans, Mull., Verm. Hist. ii. 177 (1774) 

 Cyclostoma elegans, W. et B., Ann. des Sc. Nat. 28. syn. 321 



(1833) 



d'Orb., in W. et B. Hist. 76 (1839) 



Pfeiff., Mon. Pneum. i. 227 (1852) 



Cyclostomus elegans, Mouss., Faun. Mai. des Can. 142 



(1872) 



Habitat ' Canaries ' (sec. W. et B.) ; mihi in insulis Canari- 

 ensibus omnino ignotum. 



I cannot but feel the greatest doubt whether this common 

 European Cyclostoma does truly exist in the Canarian archipe- 

 lago ; for I am not aware of any single locality, properly authen- 

 ticated, in which it has been found, and no vestige of it was seen 

 either by Mr. Lowe or myself during our twice-repeated explora- 

 tions in the whole seven islands of the Group. Neither, so far 

 as I can gather, does it appear to have been met with by any of 

 the naturalists whose material was entrusted to Mousson for the 

 compilation of his late Monograph. Yet, without specifying in 

 what particular island, or islands, they obtained it, it was loosely 

 stated by Webb and Berthelot to occur in ' the maritime regions 

 of the Canaries,' a vague and general assertion which would 

 rather tend to throw discredit, than otherwise, as it seems to me 

 (at any rate in the case of a species which has escaped the com- 

 bined researches of all subsequent explorers), on its true 



