410 TEST ACE A ATLANTIC A. 



After a careful examination of the H. deusta, Lowe, which 

 was detected by myself at a high altitude in the same island 

 (namely amongst wet sticks and leaves at the edge of a small 

 trickling stream which issues from some rocks in the Grreat 

 Final, close to, but outside, the Caldeira), I have come to the 

 conclusion that it will be better treated as a dwarfed and more 

 distinctly fasciated state of the oleacea than as a variety of the 

 persimilis. Most of its characters, such as they are, accord 

 better with those of the former than of the latter, such, for 

 instance, as its apically obtuse, sublenticular contour, its less 

 keeled basal whorl, its somewhat finer sculpture, and its browner 

 or less maculated (though by no means unfasciated) surface. In- 

 deed there is very little except its smaller size, and more 

 banded and perhaps just appreciably less broadly developed volu- 

 tions, and its somewhat less covered umbilicus, which would 

 seem to separate it from the (equally fragile) H. oleacea ; and I 

 think therefore that it will be sufficient to place it on record 

 as the ' var. a. deusta, Lowe.' Nevertheless in some respects 

 it must be admitted that it is slightly intermediate between 

 the H. oleacea and the persimilis. I will just add, however, 

 that there must have been a mistake in Mr. Lowe's mea- 

 surement of the shell, which is much smaller than his diag- 

 nosis would indicate, even the largest examples being only 

 3 lines across, in their broadest part. 



Helix Woodwardia. 



Helix Woodwardia, Tarnier, in litt. 



Mouss. 9 Faun. Mai. des Can. 45. pi. 2. 



f. 48-50 (1872) 

 Pfeiff., Mon. Hel. vii. 102 (1876) 



Habitat Teneriffam ; in humidis sylvaticis editioribus, 

 rarior. 



This rare and exceedingly fragile little Helix has been ob- 

 served hitherto only in the sylvan districts of Teneriffe, where 

 it was met with by Grasset, Fritsch, and Reiss, and subsequently 

 (particularly in the forest region above Taganana) by Mr. Lowe 

 and myself. 



The H. Woodwardia (which is a good deal allied to the 

 Palman H. oleacea, Shuttl.) is even thinner and more fragile 

 than its immediate allies ; and it further differs from them 

 in its relatively larger and more open umbilicus, and its total 

 freedom from spots and bands, its entire surface being of a 

 pale, uniform, yellowish- (or whitish-) corneous hue, though 

 some of the coarse and densely-packed striae with which it is 

 uniformly covered will be seen (when closely inspected) to be a 



