MOLLUSCA OF INDIA. 49 
being 80-100 millims., as given by Heynemann, would be quite 
6 to 9 inches when living, and extended to their full length. The 
description as regards texture of the epidermis of the mantle and 
foot agrees well; and they are both from the same part of the 
Western Himalayas—Heynemann’s specimens haying been col- 
lected by one of the brothers Schlagintweit in Shimpti (Shipki?), 
? Kumaon, Badrinath to Masuri, Garhval. There is a single un- 
named specimen in the British Museum collected by the above 
gentlemen, but it is labelled ‘ Sikkim Himalaya,” which I take to 
be this species; and this is no doubt a duplicate specimen sent 
originally to the Hon. EK. I. Co.’s Museum, whence it was lately 
transferred, with the rest of the collection, to the British Museum: 
75 mm. long, mantle 30. Six specimens were sent to me labelled 
Simla, collected in the rainy season of 1880,” by some friend, who 
LT have yet to discover, but to whom my best thanks are due, for it 
is from these specimens the drawings on Plate VI. have been made. 
They agree in every way with Theobald’s description of altivagus, 
and with the British-Museum specimen above mentioned. Heyne- 
mann does not give Sikkim as the habitat of giganteus, though he 
makes schlagintweiti common to both that and the Western Hima- 
laya. There may be some error here in the labelling of the speci- 
mens. 
ANADENUS ALTIVAGUs, Theob. 
External description of animal ( from spirit-specimen) collected at 
Simla (vide fig. 1, Piate VI.)—Slug-like, rounded above; foot 
rather pointed behind; no gland, with a narrow segmented pedal 
margin. Mantle closely fitted to the foot behind, only slightly over- 
lapping on the sides; the neck-lobes only partially developed near 
the respiratory orifice, with a fine papillate surface. The respiratory 
and anal orifices (figs. 2 & 3) situated together just above the centre 
of the mantle-margin. The generative orifice (fig. 4) at a moderate 
distance (about 8 or 10 mm.) behind the right eye-tentacle. 
Total length 70-0, mantle length 30-0, mantle breadth 20-0 mm. 
ss eZ OF a 0-8 inch. 
Largest spec.: Shell quadrate, flat, thin, horny, white, with con- 
centric lines of growth, nucleus on right central margin. 
Y 275 
Major diam. 15:0 mm., minor 10:0 mm. 
te 0-60 inch, ,, 0-4 inch. 
Odontophore, Sc. The jaw is solid and composed of 13 ribs 
(Pl. VI. fig. 5). In the radula (figs. 6, 6 a) the centre tooth is broad, 
with two small pointed projections at the base ; the adjacent laterals 
are also broad, with a single small blunt tooth on the exterior side; 
about the 28th from the centre they become much more elongated, 
and the outer basal tooth is rather sharper. The outermost laterals 
are oblong at the base, with one long blunt tooth and one or two 
small teeth disunited and separate from it, but rising from the same 
base (figs. 6a, 65). These outer teeth are very characteristic of the 
