230 TEST ACE A ATLANTICA. 



within crevices of the exposed weather-beaten rocks at the 

 extreme southern point of the Ilheo de Baixo, off Porto Santo, — 

 when ascending from the landing-place to the higher parts of 

 that calcareous island. And I have lately examined a few 

 specimens which were obtained by the Baron Paiva ; and 

 although I have no note of their precise habitat, I think it is 

 more than probable that they likewise came from the Ilheo de 

 Baixo. 



Pupa ferraria. 



P. elongata, parallela, cylindrica, subopaca, laste rufo- ant 

 subnigrescenti-brnnnea, dense et argute costulata, paulo minus 

 dura ; anfractibus convexis, vel concoloribus vel laete fasciatis ; 

 apertura magna, rotundato-auriformi, 4-plicata, sc. 2 ventrali 

 (exteriore tenui, lamelliformi, obliqua, flexuosa, interiore parva 

 brevi et profunde immersa) 1 columellari (superiore nulla), et 1 

 palatali (lma et 3tia nullis) ; peristomate angusto, tenui, acuti- 

 usculo, labro extus rotundato (nee sinuato), denticulo obsoleto, 

 sinu indistincto aperto. — Long. lin. circa 1 1. 



Pupa ferraria, 1 Loive, Ann. Nat. Hist. ix. (1852) 

 „ „ Id., Proc. Zool. Soc. Lond. 211 (1854) 



„ „ pars, Paiva, Mori. Moll. Mad. 132 (1867) 



Habitat Portum Sanctum ; in monte ' Pico d'Anna Ferreira ' 

 dicto prsecipue, in rupium fissuris, latitans. Mense Decembri 

 ineunte a.d. 1848 a meipso detecta. 



I have thought it desirable to give a fresh diagnosis of the 

 P. ferraria, in order to point out in what it differs from its im- 

 mediate allies ; for until accurately examined it might easily be 

 confounded (as indeed it evidently was by the Baron Paiva) with 

 at all events the P. corneocostata. There can be no question 

 however that it is truly distinct from that species, although 

 doubtless belonging to the same geographical assemblage, — for 

 it is not only (on the average) a trifle larger and relatively 

 broader and more elongate, as well as less solid (or more thin in 

 texture), but its costas are likewise somewhat less coarse and 

 more closely set together, and its aperture is proportionately a 

 little larger and more rounded-outwards at the lip, — the peri- 

 stome moreover being not only acuter and less developed, but 

 more completely and widely interrupted between the outer ven- 

 tral plait and the columella. The callosity also between that 

 plait (which is itself thinner or more lamell if orm) and the angle 



1 Although there was already a Pupa (from northern Italy) which was 

 published by Porro, in 1848, as the P. Ferrari (vide Mai. Com. 57. t. i. f. 4) 

 I nevertheless have not deemed it necessary to propose a fresh name for this 

 Porto-Santan species, seeing that the two titles (however near orthographi- 

 cally) are not absolutely identical. 



