228 TEST ACE A ATLANTIC A. 



sinuata auriformi (aut minus subrotundata) atque 7- (nee 

 sub. 4-) plicata, sc. plica columellari superiore (tamen minuta) 

 baud omnino obsoleta, necnon Ima et 3tia palatalibus paruin 

 distinctis sed immersis. Long. lin. 1J vix 2. 



Var. /3. resticula. Paulo minus elongata ; peristomate inter 

 columellam et plicam ventralem exteriorem magis corneo, in- 

 srassato. 



Pupa ferrariae pars, Paiva [nee Lowe], Mon. Moll. Mad. 



132 (1867) 



Habitat Portum Sanctum ; bine inde in rupium fissuris 

 submaritimarum congregans. Ad ' Cabepo da Malbada,' in 

 parte insulaB occidentali, sec. Barone Castello de Paiva, prse- 

 cipue abundat. In stratu conchylifero, semifossilis, parce 

 occurrit. 



The present Pupa migbt almost be regarded at first sight 

 as a smaller or less elongated form of the P. relevata; and 

 although I am by no means certain that this may not in reality 

 be the case, I nevertheless think that it possesses features of 

 sufficient importance to be treated as specifically distinct. 

 Thus, in addition to its being shorter than (though at the 

 same time quite as linear, or parallel, as) the P. relevata, it 

 differs in its umbilicus being wider, or more open, and in its 

 aperture being more ear-shaped or upwardly-sinuate, with the 

 peristome not only less prominent (or less raised above the 

 body-volution) but also less continuous, it being sub-inter- 

 rupted between the columella and the outer ventral plait. Its 

 colour too is of a less uniform cinereous-brown, the volutions, 

 although sometimes equally concolorous, having a tendency in 

 highly-coloured examples to be more or less obscurely fasciated ; 

 and the plaits themselves, although deeply immersed, are a 

 little more developed, the upper columellary one, although 

 minute, being quite traceable, whilst the first and third pala- 

 tial ones are likewise comparatively conspicuous ; thus causing 

 the mouth to be better defined as 7- (than 4-) plicate. 



The <var. /3. resticula 1 is in some respects intermediate 

 between the P. corneocostata and the relevata, its larger size 

 and more developed peristome making a decided approach to 

 what are the main features of the latter; nevertheless the 

 ultimate volution is appreciably shorter, and the aperture 

 (although with a thickened peristome between the outer ventral 

 plait and the columella) is both less raised and differently 

 shaped. 



Many examples of the P. corneocostata were obtained from 

 Porto Santo a few years ago by the Baron Paiva, and were for- 

 warded by him both to Mr. Lowe and to myself as the 'P. 



