506 TEST ACE A ATLANTIC A. 



(on the authority of Mr. Pease) as occurring also in New South 

 Wales ! It is pretty evident therefore that either this latter 

 locality or else Mr. Cuming's original one is erroneous ; and 

 until this particular point has been properly cleared up, the H. 

 corneovirens can be admitted only provisionally into the fauna 

 of the Cape Verdes. 1 



( Xerophila, Held.) 

 Helix armillata. 



Helix 6 striata, Drap. ?' Lowe, Cambr. Phil. S. Trans, iv. 



53(1831) 

 Lowei, Pot. et Mich. [nee Per., 1835], Gall, des 



Moll. 91 (1838) 



armillata, Lowe, Ann. Nat. Hist. 113 (1852) 

 Id., Proc. Zool. Soc. Lond. 170 (1854) 



Alb., Mai. Mad. 20. t. 2. f. 32-35 (1854) 



Morel., Hist. Nat. des Acor. 174. t. 3. f. 7 



(1860) 

 eumseus, Lowe, Proc. Linn. Soc. Lond. ; Zool. 198 



(1860) 

 armillata, Morel., Journ. de Conch, xiii. 236 (1873) 



Habitat S. Vicente (sec. Morelet) ; a DD. Bouvier et de 

 Cessac parcissime lecta. 



I have not myself seen a type of this rather widely spread 

 and insignificant submaritime little Helix from the Cape Verdes ; 

 but since it exists in the Azorean and Madeiran archipelagos 

 and likewise on the west coast of Morocco, it is extremely likely 

 to extend to the present Group where, according to Morelet, 

 two examples have lately been met with, by MM. Bouvier and 

 de Cessac, in the island of S. Vicente. ' Deux individus,' says 

 he, ' de 1'espece, jeunes mais parfaitement reconnaissables, ont 



1 I may just call attention in this place to the H. gyrostoma of Ferussac 

 (Bull Univ. des So. et de VIndustr. 301 ; 1827), which I reject entirely, as 

 Dohrn and others have done, as altogether a doubtful native of the Cape 

 Verdes, or, at any rate, as published on evidence which is untrustworthy. 

 It would seem indeed as if Ferussac had fallen into some strange confusion 

 about it, for the species is cited by Pfeiffer (Mon. Hel. i, 238) as a North- 

 African one, occurring, according to Ferussac himself in his earlier works, 

 in Tripoli ; and yet its 'habitat ' is also given, a few years later on, as 'Praya 

 in insult S. lago.' Clearly, therefore, there is a mistake somewhere ; and it 

 is impossible, without further data, to admit the species into the Cape- 

 Verde catalogue. Dohrn remarks of it, with reference to its asserted 

 habitat : ' No species can be very common " on the downs by the sea," from 

 the simple fact that there are no " downs " there at all ; and in the neigh- 

 bourhood of the sea, where I myself have constantly made excursions, no 

 land-snails at all appear.' Pfeiffer, in his seventh volume (p. 272), in 1876, 

 gives the habitat simply as ' Tripoli ; ' which looks as if he had at length 

 satisfied himself that the S. Jago one was erroneous. 



