MADEIRAN GROUP. 277 



Craspedopoma Monizianum, Pfeiff., Novitat. Conchol. iii. 



447. pi. 98. f. 31 (1869) 



Habitat Maderam ; in rupibus submaritimis occurrens, sed 

 rarius. 



I think there can be no doubt that this Craspedopoma is 

 truly distinct from every phasis of the G. lucidum, — from which 

 it differs in its uniformly rather smaller size, its subopake, 

 almost concolorous, dark coffee-brown hue (the apical region 

 however being usually a shade paler), by its more finely and 

 closely, but minutely sub reticulate (or decussated) surtace (the 

 transverse strise being reduced in dimensions, and set closer 

 together, while the spiral ones appear, under a high magnifying 

 power, to be more appreciably developed), and by its spire being 

 relatively somewhat more produced, with the volutions still 

 more tumid, and with the suture consequently even more deeply 

 impressed. Its aperture, too, and operculum are proportionately 

 smaller ; the latter being likewise of a browner and paler, or 

 less reddish-chestnut, colour, and with the concentric ribs, or 

 circular costse, more numerous, more regular, and more 

 elevated. 



The C. Monizianum occurs on the maritime and submari- 

 time declivities of Madeira proper, at only a moderate elevation 

 above the sea, and does not appear to enter the ' wooded dis- 

 tricts ' (properly so called). Its principal habitat is about the 

 Brazen Head and Canifo, in the south-east of the island, — where 

 it has been met with by Sr. J. M. Moniz, Mr. Lowe, Mr. Lea- 

 cock, myself, and others ; but there are likewise traces of it in 

 the northern regions also, a few examples having been found by 

 Mr. Leacock in 1861 and by Mr. Lowe in 1862 at the mouth of 

 the Ribeira do Inferno. 



As to the Baron Paiva's assumption that the G. Monizianum 

 exists in Porto Santo, I think that we cannot endorse it 

 until further evidence has been obtained ; for the Baron's 

 material was not usually collected by himself, and there seems 

 nothing (so far as I can ascertain) to warrant that hypothesis. 



Craspedopoma Lyonnetianum. 



Cyclostoma Lyonnetianum, Lowe, Ann. Nat. Hist. ix. 



(1852) 

 Craspedopoma Lyonnetianum, Pfeiff., Mon. Pneum. 52 



(1852) 

 Cyclostoma Lyonnetianum, Loive, Proc. Zool. Soc. Lond. 



217 (1854) 

 „ „ Alb., Mai. Mad. 73. t. 16. 



f. 32-34 (1854) 



