MADEIRAN GROUP. 227 



Pupa millegrana. 



Pupa millegrana, Lowe, Ann. Nat. Hist, ix (1852) 

 „ Pfeiff., Mon. Hel. iii. 558 (1853) 



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



„ „ Alb., Mai. Mad. 66. t. 15. f. 39, 40 (1854) 



„ „ Paiva, Mon. Moll. Mad. 132 (1867) 



Habitat Maderam, Desertam Grandem, et Desertam aus- 

 tralem (' Bugio ') ; sub lapidibus aridis, necnon in rupium 

 fissuris submaritimarum, sese occultans. In stratu conchylifero 

 Canicalensi Maderaa semifossllis reperitur. 



With the exception of the P. saxicola and linearis, this is 

 the smallest of the Madeiran Pupce ; and in its dark-brown 

 colour, linear outline, and tumid volutions, its prima facie 

 aspect is precisely that of what might be supposed to be a very 

 diminutive P. fusca. Apart however from its excessively 

 minute size, it will be found on inspection to be relatively more 

 coarsely, and not so closely, costate-striate ; its volutions appear 

 to be not quite so numerous ; whereas its plaits are rather more 

 so, or at any rate more developed. These latter are seven in 

 number, — namely 2 ventral (which may be almost said to be 

 subequal), 2 columellary (the upper one of which is incon- 

 spicuous), and 3 palatial (the central one being large), and 

 which seem almost to fill up the inner cavity of the mouth. 



The P. millegrana occurs principally under stones and 

 within the hollows of scoria in dry and exposed places of a 

 rather low elevation towards the coast. It has been found in 

 the south of Madeira proper, and on the two Southern Desertas. 

 On the Deserta Grande it was first taken by Mr. Leacock, in 

 June 1848, and subsequently by myself and the late Eev. W. J. 

 Armitage in January 1849, as well as by Mr. Lowe arid myself 

 during May 1850 and June 1855. And a single example was 

 met with by Mr. Lowe, at the last-mentioned date, on the 

 Southern Deserta (or ' Bugio '). 



In a subfossil state, the P. millegrana is tolerably abundant 

 near Canical ; but I am not aware that it has yet been observed 

 in the muddy deposits on the summit of the Southern Deserta. 



Pupa corneocostata, n. sp. 



P. relevatm affinis, sed paulo minor, minus elongata, et 

 subremotius costata ; umbilico conspicue latiore ; anfractibus 

 plerumque paulo magis eviclenter subfasciatis (rarius omnino 

 concoloribus), anfr. ultimo sensim subbreviore ; peristomate 

 lato corneo subrefiexo sed minus continuato (i. e. inter columel- 

 lam et plicam ventralem exteriorem subinterrupto) necnon con- 

 spicue minus exstanti aut minus relevato ; apertura magis 



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