MOLLUSCA OF INDIA. 55 
Fig. 6a. Upper portion of male organ (P), showing the termination of the 
vas deferens within the swollen portion where the retractor 
muscle is given off. 
66. Diagrammatic vertical section of fig. 6, viewed from the side. 
6c. Horizontal section of same. 
7. Anadenus jerdoni, n. sp., nat. size: spirit-specimen. Kashmir. 
Genus Hyarmax, H. & A. Adams. 
(Plate XI.) 
The genus is indicated with the following very short description 
in ‘The Genera of Recent Mollusca,’ vol. i. p. 219 (1858), type 
species perlucidus, Quoy & Gaimard:—‘* Orifice of respiratory 
aperture in the middle of the left side of the mantle; animal pel- 
lucid.” This very imperfect description of a new genus was no 
doubt made upon Quoy and Gaimard’s drawings and description of 
Limax perlucidus, Voyage lAstrolabe, pl. xiii. figs. 10-13 (1832):— 
“Timax, corpore ovali, depresso, perlucido, albo, punctis nigris 
notato ; tentaculs minimis, crassis, nigro striatis ; ossiculo corneo 
ovato.” Shell ovate, horny, with an indication of a whorl at the 
top. Male organ near the right tentacle; no caudal gland. 
Habitat. Pouce Mountain, Isle of France. Gray placed this species 
as the second in his genus Drusia (Cat. Pulm. Brit. Mus. 1855, 
p- 59), of which the first species and type was Parmacella valen- 
ciennii, Webb & Van Beneden, from the Hippurite Hills of Alcantara 
(Webb), Portugal. Adams was quite right in separating it from 
this Kuropean form. Even Gray, who gives a subcaudal gland as 
a character of his genus, says, “ Intermediate between Limaw and 
Parmacellus, Quoy. Though Quoy and Gaimard have not mentioned 
the subcaudal gland, I have ventured to place it in this family with 
doubt.” There is no indication of this gland in the figures given of 
the animal. 
Gray’s genus Drusia is made up of a number of very different and 
distinct forms, and, as Fischer truly points out (Journ. de Conch. 
1872, pp. 207, 208), has no value whatever and cannot stand. 
In July 1867, Mr. P. Fischer, in the ‘Journal de Conchyliogie,’ 
p. 18, describes this genus most fully, and gives figures of it and its 
anatomy. As this genus is now to be included among our Indian 
Land Mollusca, I cannot do better than extract it in full, for the 
benefit of those who may not have access to the above journal. 
“ J’ai recu de M. Deshayes un Limacien recueilli 4 Vile de la 
Réunion (Bourbon) par M. Maillard, le patient collecteur, dont nous 
déplorons la perte récente. Un premier examen suffit pour recon- 
naitre ses affinités avec le Limaa perlucidus de Quoy et Gaimard 
(Astrolabe, pl. xiii. figs. 10-13), signalé 4 V’Isle-de-France sur la 
montagne du Pouce. Le Limaa perlucidus de Quoy est devenu le 
type du genre Hyalimax de MM. H. et A. Adams, c’est, par consé- 
quent, sous ce nouveau nom générique qu’on devra désigner le 
Limacien de Bourbon: Hyalimax maillardi. 
“ T’animal est long d’environ 15 millimétres; le manteau est formé 
