382 TEST ACE A ATLANTICA. 



Grroiip (absolutely swarming in Porto Santo), and is found like- 

 wise at the Azores ; but it is nevertheless strictly an ' Atlantic ' 

 species, not having been observed hitherto either in Europe or 

 Africa. 



The H. paupercula (which measures about 2^ lines across 

 its broadest part, and which possesses the curious habit of coat- 

 ing itself over, though not always, with a hardened envelope of 

 dirt) is opake in surface, and either brown or grey in hue ; and 

 it is closely and minutely granulated all over, with the oblique 

 transverse lines of growth rather conspicuous. Its umbilicus is 

 large and spiral ; and although its peristome is acute, circular, 

 and elevated, its aperture is much bent down and very power- 

 fully constricted, so as to shape out a corneous ring-like pro- 

 minence behind the former. 



(§ Lyruhi, Woll.) 



Helix Loweana. 



Helix torrefacta, Lowe [nee Adams, 1849], Ann. Nat. Hist. 

 vii. 106 (1861) 

 Pfeiff., Mon. Hel. Y. 261 (1868) 

 Patula torrefacta, Mouss., Faun. Mai. des Can. 27. pi. 2. 



f. 25-28 (1872) 

 Helix torrefacta, Pfeiff., Mon. Hel. vii. 298 (1876) 



Habitat Lanzarotam ; ad rupes arid as apricas torrefactas, 

 prsecipue versus oram borealem, inter lichenes, occurrens. 



This is a most elegant, lenticular little Helix, very delicately 

 and shortly pilose, or spirally laciniated, conspicuously lunbili- 

 cate, and beautifully blotched on the upper portion with irregu- 

 lar white markings on a brown ground. In affinity it is not 

 far removed from the H. lentiginosa, Lowe, of Madeira ; never- 

 theless it can hardly, I think, be admitted into the same actual 

 group with that species, — owing to the rather anomalous cha- 

 racter which it possesses of being girt, both above and below, 

 with (in addition to its closely-set oblique subundulating trans- 

 verse costse) minute spiral lines. Indeed the existence of these 

 spiral lines induced Mousson to propose for it, in conjunction 

 with the H. clrcumsessa of Shuttleworth, a new section 

 (' Lyra'),— regarding them both, however, as Patulas; but I 

 have already shewn {vide ante, p. 318) that the H. circum- 

 sessa is no Patula at all, but a Hyalina (intimately related to 

 the H. lenis, Shuttl., and my H. osoriensis), and it would be 

 preposterous to treat the present Helix as a Hyalina! And 

 indeed I cannot but believe that it is almost equally removed 

 from even the genus Patula as it is from Hyalina, — its affini- 



