a 
L50 APPENDIX—VIfRINA HIBERNICA. 
closely studied in collaboration with Prof. Simroth, of Leipzig, our 
greatest authority upon the group, who is responsible for the dissections 
of the reproductive systems. 
‘The result of this investigation shews that the Irish specimens, though 
intimately allied to Vitrina elonguta, are really a quite distinct species, 
for which Vitrinw hibernica is an appropriate name. 
The facts upon which this statement was based were set forth on 
Oct. 3rd, 1908, on the cover of Part xv. of this Monograph, and the many 
anatomical details then given in its support are reproduced here. 
OO 
Bic. 509. Fic. 510. Fic. dll. Fic. o12. 
Fics. 509 and d11.—I Vtrina pyvenaica Feér., as seen from beneath, enlarged (after Férussac). 
Fic. 510.—l'itrina pyrenaica Fér., as seen from above, enlarged (after Férussac). 
hic. 512.—Vitrina pyrenaica Fér., as seen from above, natural size (after Férussac). 
I. pyrenaica, however, would appear to be really an indeterminate or 
dubious species, as Férussac never described it, and so far as he is con- 
cerned the species is known only by his figures of the shell and the following 
precise description of the locality where it is supposed to have been found : 
Helicolimax “pyrenaica nobis, pl. 1x., f. 3—Habite les Pyréneés A 200 ou 
300 toises au dessus des Eaux Bonnes, vallée d’Ossian prés de Pie du Midi.” 
Specimens of a V%trinw have from time to time been collected at Eaux 
Bonnes and other places in France and Spain by various persons, which 
have been regarded and sometimes recorded as Vitrina pyrenaica by their 
collectors, but it is more than probable that these specimens do not 
represent the species here described as V. hibernicu. 
Abbe Dupuy, a celebrated and enthusiastic conchologist, and author of 
one of the most important standard works on the Mollusca of France, who 
lived within reach of the published locality, regarded V. pyrenaica as a 
myth, stating that although he had often and assiduously sought expressly 
for it on the precise and only spot indicated by Férussac, he had only found 
V. beryllina or V. elongata there, and seems inclined to regard the illus- 
trations as unprecise figures of the former species ; while M. Mermet, who 
so especially and thoroughly studied the molluscan fauna of the Western 
Pyrenees, could never find and indeed never saw the species. 
Moquin-T'andon describes a V. pyrenaica in his work, and enumerates 
the places in which it is said to be found, but appears to have done so 
without personal knowledge, as they lack his usual mark of personal 
verification, and, further, his description does not apply to the animal 
inhabitant of the Irish shell, while his figure shows a much more globose 
and less degenerate shell than our V. hibernica. 
The comparison of I*érussac’s figures with those of Vitrina hibernica 
show them to belong to a quite different species, and it is sufficient to note 
the much greater extension of the unecalcified membranous fringe to the 
basal margin of the aperture to clearly establish this. 
As the name pyrenaica rests solely and entirely upon the figures of 
the shell, here reproduced, and no information whatever is given by its 
author in reference to the animal inhabitant or to any part of its internal 
organization, any opinion or judgment as to its identity or otherwise with 
other forms must necessarily be based solely upon the published figure of 
the shell. 
