134 TEST ACE A ATLANTIC A. 



nearly uncarinated) form and smaller umbilicus, in its thinner 

 and more transparent substance, in its pale corneous, well-nigh 

 unicolorous, almost efasciate surface, and by its sculpture being 

 both finer and of a different kind, the oblique transverse lines 

 being comparatively indistinct, but the whole portion visible 

 from above densely crowded with minute granules. The under 

 region is likewise granulated, but much less evidently so ; and 

 it is also rather more shining. Its peristome, although con- 

 tinuous, is not quite so regularly rounded across the body-volu- 

 tion, nor is it so much raised ; and its basal whorl is not so 

 suddenly deflected in front. 



As regards hue, this species is practically unicolorous, it 

 being of a light horny brown above, and rather paler beneath ; 

 nevertheless when carefully inspected, it will generally be seen 

 to have a narrow and most obscure obsolete band immediately 

 below the dorsal line (or the position of the keel). Indeed in 

 fresh and highly developed examples the faintest possible trace 

 of even an upper one is sometimes just distinguishable, but 

 so suffused and lost sight of as merely to infuscate that portion 

 of the surface with a rather more cloudy tint. At any rate the 

 species, despite its prima facie appearance, can hardly be de- 

 nned as perfectly ' efasciate.' 



The H. leptosticta is eminently characteristic of the lofty 

 cliffs and dry maritime hills to the eastward of Funchal, in the 

 direction of the Cabo Garajao (or Brazen Head), where it is 

 rather abundant ; but I have not myself observed it in any 

 other district. It is recorded, however, by the Baron Paiva 

 from the Southern Deserta, a habitat which, although cer- 

 tainly requiring corroboration, is not altogether an improbable 

 one. 



Helix micromphala. 



Helix micromphala, Lowe, Ann. Nat. Hist. ix. (1852) 

 Pfoi/., Mon. Hel. iii. 151 (1854) 



Lowe, Proc. Zool. Soc. Land. 195 



(1854) 

 Alb., Mai. Mad. 30. t. 7. f. 14-16 



(1854) 

 Paiva, Mon. Moll. Mad. 53 (1867) 



Habitat tres Desertas (sc. Borealem, Grandem, et Austra- 

 lem) ; vulgaris. Semifossilis in Deserta Australi reperitur. 



This Helix is so closely allied to the H. leptosticta that, 

 had not the latter been recorded by the Baron Paiva from the 

 Bugio, it might almost have been looked upon as a highly- 

 developed Desertan modification of that species. It seems to 

 differ in being a little larger and less flattened, or more globose, 



