342 TEST ACE A ATLANTIC A. 



taken also by Webb in 1829, in the extreme north of the same 

 island, particularly in the ' Malpais,' or ancient lava-current, 

 of the Montana de la Corona. In Fuerteventura we obtained 

 it rather abundantly on the summit of Monte Atalaya, over- 

 looking the Rio Palmas, where the examples are of a very 

 large stature, and have their peristome monstrously developed. 



In a subfossil condition Mousson records the H. sarcostoma 

 from Lanzarote and Fuerteventura, though it is only from the 

 latter of those islands that I possess it distinctly subfossilized ; 

 and I myself met with it in Grand Canary, namely in the cal- 

 careous deposits on the maritime ridge between Las Palmas and 

 the Puerto da Luz. 



In the general character of its somewhat dappled colouring 

 this fine Helix is a little suggestive at first sight (particularly 

 when the specimens are young and the aperture is unformed) of 

 the common European H. aspersa ; nevertheless it is altogether 

 of a warmer, and more livid, tint, and its bands (which are 

 normally four or five in number) are sometimes comparatively 

 distinct and uninterrupted, in which case all resemblance with 

 that species ceases. It is a solid shell, rather obliquely-elon- 

 gated in contour, quite imperforate (when adult), and with its 

 peristome (which is of a pinkish- or fleshy-white, and very 

 highly polished) more or less broadly expanded and recurved, 

 often indeed (as in many of the Fuerteventuran examples) mon- 

 strously so. The upper and lower margins of its aperture, 

 which are joined by a thin intervening lamina, are slightly 

 approximated ; the latter is sinuated internally, at a considerable 

 distance beyond the columellary portion, so as to shape out an 

 elongated basal obtuse tooth-like ridge ; and its whole surface 

 is opake, and very densely and minutely granulated all over, but 

 with the transverse lines of growth feeble and subobsolete. 

 Apart from the freckles and interrupted bands, its upper region 

 is often unequally clouded, or suffused, after the fashion of 

 tortoiseshell, yellowish ill-defined blotches being frequently 

 traceable in various parts ; and outside the aperture, which is 

 very greatly deflexed, it is always more or less gradually fla- 

 vescent. 



Helix Saulcyi. 



Helix Saulcyi, cTOrb., in W. et B. Hist. 56. t. 3. f. 9-11 



'1839) 



Pfeiff., Mon. Hel. i. 267 (1848) 



Mouss.,Faun. Mai. des Can. 87 (1872) 



temperata, Id., ibid. 87. pi. 5. f. 5, 6 (1872) 

 ?1 et Saulcyi, P/., I. c. vii. 343, 344 (1876) 



