50 TEST ACE A ATLANTIC A. 



simply, that he thought it must be found upon them all, is a 

 problem which I am altogether unable to solve. At any rate, 

 until cause has been shown to the contrary, we have no choice 

 but to receive his assertion as strictly true. 



Fam. 5. AURICULIDiE. 



Genus 14. PEDIPES, Adorns. 

 Pedipes afra. 



Le Pietin, Pedipes, Adans., Hist, du Seneg. 11. t. 1. f. 4 



(1757) 

 Helix afra, Gmelin, Syst. Nat. i. 3715 (1790) 

 Pedipes afra, Loive, Zool. Journ. v. 296 (1835) 



„ „ Id., Proc. Zool. Soc.Lond. 218 (1854) 



„ afer, Drouet, Faun. Acor. 169(1801) 



„ „ Paiva, Mon. Moll. Mad. 153 (1867) 



Habitat Pico ; rupibus maritimis, aestu maris quotidie sub- 

 mersis, adhserens. 



The P. afra, which is locally abundant along the shores of 

 Madeira, and which occurs likewise at the Salvages, appears to 

 be common on sea-washed rocks in Pico ; but it has not hitherto 

 been noticed in any of the other islands of the Azorean archipe- 

 lago. It is a species of a wide geographical range, and one 

 which seems to be found on many parts of the African coast. 

 Although it has not yet been observed for certain at the Canaries, 

 we may be pretty sure that it must exist equally in that Group. 



Genus 15. AURICULA, Lam. 



Auricula aequalis. 



Melampus aequalis, Lowe, Zool. Journ. v. 288, t. 1 3. f. 1-5 



(1835) 

 Auricula aequalis, Id., Proc. Zool. Soc. Lond. 217 (1854) 

 „ Vulcani, Morel., Hist. Nat. des Acor. 207. t. 5. f. 8 



(1860) 

 „ „ Drouet, Faun. Acor. 167 (1861) 



„ „ Mouss., Faun. Mai. des Can. 135 (1872) 



„ aequalis, Watson, Journ. de Conch. 220 (1876) 



Habitat Terceira, et Pico ; rupibus saxisque adhaerens, in 

 salinis et subsalinis, ad oras rivulorum. 



I have mentioned in my account of this Auricula which is 

 given in the section pertaining to the Madeiran Group that I 

 possess the most conclusive evidence that the A. Vulcani, of 

 Morelet, described from examples taken in Terceira and Pico, 

 and which is said to occur likewise in Teneriffe, is nothing more 



