CAPE-VERDE GROUP. 511 



appear just appreciably more tumid and the suture a little more 

 oblique. But as I perceive exactly the same tendency (as just 

 stated) in the two sets which are now before me, I have no 

 hesitation whatever in treating them as conspecific. 



The small size, pallid hue, and subdiaphanous (though not 

 very shining) surface of this little Stenogyra, which ranges 

 from about 1-|- to 2-J- lines in length, added to its rather obtuse 

 or blunted apex, and the peculiarity of its sculpture (it being 

 more or less densely covered with minute and exceedingly 

 curved hair-like lines, the alternate ones amounting almost to 

 irregular costae, and which perhaps are a trifle less evident in 

 the Cape-Verde examples than they are in those from England), 

 will at once suffice to distinguish it from everything else with 

 which we are here concerned. 



I met with this Stenogyra somewhat abundantly both in 

 S. lago and Brava ; and it was found by Dohrn in S. Antao, 1 

 and by M. Bouvier (cf. Morelet, 1. c. 239) in S. Nicolao. 



Stenogyra subdiaphana. 



Helix Bamboucha, Fer., Cat. Rang, in Bull. Sc. Nat. (1827) 

 Pupa subdiaphana, King, Zool. Journ. v. 340 (1831) 

 Bulimus Bamboucha, W. et B., Ann. des Sc. Nat. 38 (1833) 



subdiaphanus, Pfeiff., Mon. Hel. ii. 163 (1848) 

 Buliminus subdiaphanus, Dohrn, Mai. Bldtt. xvi. 11 (1869) 

 Pupa subdiaphanus, Mouss., Faun. Mai. des Can.1'22 (1872) 

 Bulimus subdiaphanus, Morel., Journ. de Conch, xiii. 238 



(1873) 



Habitat S. Nicolao, S. lago, Fogo, et Brava ; sub lapidibus, 

 praecipue in aridis submaritimis, occurrens. 



This very peculiar Stenogyra belongs to a totally different 

 type from the two preceding members of the genus ; and in 

 some respects indeed it has a closer resemblance, at any rate at 

 first sight, to the -large Pupa dealbata, W. et B., of the Cana- 

 rian Group, which is equally white, and has an equally eden- 

 tate aperture. It is however considerably longer, in proportion, 

 and relatively narrower, than that gigantic Pupa; and it 

 gradually tapers towards the tip (instead of being shortly- 

 cylindric, and apically rounded and obtuse) ; and its surface is 

 not only very much less coarsely striated, but likewise less 



1 I include S. Antao amongst the ascertained Jiabitats of this species, 

 because out of two examples which were sent to me by Dr. H. Dohrn as 

 types of his ' Ccecilianella am&nitatum,' labelled as having come from that 

 island, one of them belongs to our present Stenogyra ; and I have no reason 

 to suspect that there was any mistake as regards the place from whence they 

 were implied to have been obtained. 



