MADEIRAN GROUP. 187 



examples which are not pale and bleached (and the pallid ones 

 are exceptional with the H. Jictills) being of an irregular, or 

 clouded, plumbeous- and cinnamon-brown, gradually a little 

 diluted in hue towards the aperture, and whitish beneath, but 

 with an infra- and supra-carinal band tolerably conspicuous, 

 though often blended or contluent. The peristome, also, is less 

 decidedly ocbreous than in the H. dealbata. 



(§ Actinelld; Lowe.) 



Helix lentiginosa. 



Helix lentiginosa, Loive, Ckonibr. Phil. S. Trans, iv. 49. t. 5. 

 f. 25 (1831) 

 „ „ Pfeiff., Mon. Hel. iii. 164 (1853) 



„ „ Lowe, Proc. Zool. Soc. Loud. 180 (1854) 



„ „ (pars), Alb., Mai. Mad. 38. t. 9. f. 17-20 



(1854) 

 „ „ Paiva, Mon. Moll. Mad. 32 (1867) 



Habitat Maderam ; sub foliis Sempervivorum aridis emor- 

 tuis, ad rupes (prsesertim maritimas) crescentium, vulgaris. 



The H. lentiginosa is a depressed, rounded, sublenticular 

 little species (about 2^ lines across its broadest part), thin and 

 fragile in substance, with a distinct and open umbilicus, and 

 densely sculptured with coarse transverse costate lines, as well 

 as sparingly clothed with squamiform hairs, or hair-like lacinise. 

 Its siuface is nearly opake and of a pale corneous brown, but 

 more or less blotched or marbled with a few irregular whitish 

 transverse patches and streaks ; and its peristome, although 

 slightly interrupted across the body-volution, is expanded and a 

 good deal developed. 



I am not aware that the present Helix has occurred beyond 

 the limits of Madeira proper ; for although it is recorded by the 

 Baron Paiva from the Southern Deserta, yet there is so much 

 doubt attaching to many of his various habitats (through the 

 fact of his material having simply been brought to him, at 

 intervals, by mere paid collectors sent out from P'unchal, and 

 often inadvertently mixed up afterwards, even by himself, with 

 specimens from other localities) that I cannot but regard the 

 present one as somewliat dubious, or at any rate as requiring 

 further confirnaation. But in Madeira proper the H. lentiginosa 

 is decidedly a common little species, and one which occurs 

 principally amongst the dead and dried-up leaves of the rosette- 

 like plants of Sempervivum which stud the faces of the rocks 

 both at low and intermediate altitudes. Along the line of 

 abrupt sea-cliffs, in the north of the island, from 8ao Vicente 

 to !Sta. Anna, it is more or less abundant, as also westward to 



