^70 TEST ACE A ATLANTICA. 



misshapen^ and the outer tooth considerably developed. More- 

 over its habitat 'Puerto da Gruz^ looks exceedingly like a 

 misprint for Puerto da Luz, which is the exact locality for the 

 H. Glasiana in its subfossilized condition ; and, in further cor- 

 roboration of this, it is noteworthy that Grasset is reported to 

 have also met with the H. Saulcyi in a subfossil state, — a spe- 

 cies which occurs in company fuith the (equally subfossilized) 

 H. Glasiana, and emphatically in the vicinity of the Puerto da 

 Lnz. My belief therefore is, tbat Grrasset's subfossilized speci- 

 mens and my own are specifically identical, and that they both of 

 them represent a very slightly modified phasis of the H. Glas- 

 iana (my examples, which are perhaps less decorticated than 

 Mousson's were, having, in addition to the obsoleteness of the 

 upper tooth of the peristome, the granulations distinctly trace- 

 able on to the very nucleus), and have nothing whatever to do 

 with the exclusively Teneriffan H. nialleata. 



Helix Fritschi. 



Helix Fritschi, Mouss., Faun. Mai. des Can. 93. pi. v. 

 f. 12 (1872) 

 „ „ Ffeiff., Mon. Hel. vii. 360 (1876) 



Habitat Gromeram ; recens circa San Sebastian, et semifos- 

 silis ad Hermigua, vulgaris. 



Although belonging to the same type, this is a smaller, 

 thinner, and more globose shell than any of the preceding- 

 three species, its aperture is more regularly rounded, and its 

 peristome is much less incrassated, — the tooth-like callosities 

 which are more or less evident in the other members of the 

 nialleata group, being here quite obsolete ; though sometimes 

 an exceedingly faint thickening in the two usual places is just 

 traceable, as though to point out its affinities. The H. Fritsch i 

 moreover is remarkable for the greater opacity of its (unmal ■ 

 leated) surface, even the under portion being almost free from 

 gloss, — a peculiarity which is due to its extremely densely and 

 minutely roughened type of sculpture, which, although at first 

 sight appearing to be granulose, will be seen (beneath a high 

 magnifying power) to be the result of a system of closely-packed 

 extremely diminutive transverse lines which are broken-up into 

 elongated granuliform parts, some of them well-nigh merging 

 into true granules. In colour the H. Fritschi is somewhat 

 curious, — the ground-tint being of a dirty whitish- or brownisli- 

 yellow, freckled all over with fragmentary lines and small an- 

 gular subconfluent blotches of a slightly paler hue; and, in 

 addition to all this, there are 4 narrotu and not very conspicu- 

 ous darker bands, — one of which is placed just below tlie dorsal 



