618 TESTACEA ATLANTIC A. 



Habitat S. Autao, et S. Vicente ; sub lapidibus necnon ad 

 radices arbustorum, rarior. 



Although quite distinct from it specifically, the present very 

 diminutive Achatina belongs to the same group as the Eu- 

 ropean A. acicula (which occurs also in the Madeiran and 

 Canarian archipelagos) ; nevertheless it is still smaller, narrower, 

 thinner, paler, more highly polished, and more transparent ; its 

 spire (which has a volution less) is shorter and a little more 

 obtuse at the apex, the whorls being not only a trifle more 

 abbreviated but also just appreciably less flattened ; its suture 

 is less margined, and less oblique; its columella is relatively 

 somewhat longer and straighter, and more flexuose ; and its 

 entire outline is both narrower and more fusiform. 



This little Achatina was first met with by Mr. E. L. Layard, 

 now many years ago, near the 'Duke's Head Mountain,' in 

 S. Vicente, while touching at that island on his passage to the 

 Cape of Grood Hope ; and there can be no doubt that it is con- 

 specific with Dohrn's ' Ccecilianella ammnitatum^ a type of 

 which (from S. Antao) is now before me ; — for the only point in 

 Benson's diagnosis of his A. spiculum which does not accord 

 precisely with Dohrn's specimen consists in the fact that an 

 extra volution or two would seem to be implied ; but as the 

 exact number of whorls is a character which is eminently 

 variable in the whole Achatina group, I do not place much 

 confidence in its specific importance. 



(§ CooJilicopa, Fer.) 



Achatina lubrica. 



Helix lubrica [var.], MillL, Hist. Verm. ii. 104 (1774) 

 „ „ Lowe, Cambr. Phil. S. Trans, iv. 61. t. 6. f. 29 



(1831) 

 Achatina lubrica, 7., Pfeiff., Mon. Hel. ii. 273 (1848) 

 Bulimus maderensis, Loive, Ann. Nat. Hist. ix. 119 (1852) 

 Achatina maderensis, P/ei^., Mon. Hel. iii. 504 (1853) 

 „ „ Loiue. Proc. Zool. Soc. Lond. 199 



(1854) 

 Glandina maderensis. Alb., Mai. Mad. 55. t. 14. f. 20, 21 



(1854) 

 „ ,„ Morel., Journ. de Conch, xiii. 242 



(1873) 

 Achatina lubrica, Watson, Journ. de Conch. 223 (1876) 



Habitat ins. Cap. Viridis (sec. Morelet) ; nisi fallor, a DD. 

 Bouvier et de Cessac reperta. 



In his recently published list of the Land-Shells of the Cape 

 Verdes, Morelet includes this common European Achatina ; 



