MOLLUSCA OF INDIA. 241 
outer cusp low down, quite basal, so that they are almost unicuspid ; 
these become very small on the outer margin. 
£0) CWO De Loy, -40 
Hor. Lys 5d 
The jaw with a large central projection (Plate LXIL. fig. 5 a). 
This is the form I described in 1875 as Helicarion solidum. It 
has somewhat the form of a small G. hookeri when alive. <A 
specimen from Kohima was dark umber, pinker below, with no 
mottling on the body; tentacles dark. 
In another specimen from the Dunsiri valley, Assam, the animal 
was pinkish grey with dark mottling, the mantle covered the whole 
shell and had a slight indentation on the extreme anterior margin 
(an individual peculiarity); the mucous gland with small lobe above, 
the extremity of foot cut off rather square. 
Total length 2°70, mantle 1°3, mantle to head 0°5 in. 
Shell: major diam. 0-44 in. 
Grrasta (Isycus?) cinprea, G.-A. (Plate XL. fig. 8, from life.) 
Helicarion (Hoplites) cinereus, Godwin-Austen, Journ. A. 8. B. 
1876, p. 314, pl. viii. fig. 2, animal. 
The shell was not described when taken, and it has since been 
mislaid. The description of the animal, which was made at the 
time, is as follows:—‘‘ Animal when fully extended long and 
narrow, colour dusky grey; mantle with a papillated surface slightly 
spotted, the spotting being coarser on the body and tail. Tentacles 
short and bluish, with the oral very close below them. 
‘* Length 0:75, mantle 0-40 in. 
“ Habitat. On the Darpang river, at foot of the Dafla Hills, under 
old logs in the forest.” 
Grrasta (Ipycus ?) soxrpa, G.-A. 
Helicarion (Hoplites?) solidus, Godwin-Austen, P. Z. 8. 1872, 
p- 518, pl. xxx. fig. 10. 
Helicarion solidum, Godwin-Austen, Journ. A. 8. B. 1875, p. 6 
(pl. ii. figs. 5, 5a, 5 b, 5c, 5d, is a different species, vide cacharica). 
Vitrina solida, Hanley, Conch. Ind. p. 61, pl. cli. fig. 6 (bad 
drawing). 
Helicarion (sec. B) solidus, Theob. Supp. Cat. p. 23, not from hills 
below Cherra Poongee. 
Helicarion (Austenia) solidus, Nevill, Hand-list, p. 16, from Naga 
Hills, is G. cacharica. 
Locality. Hengdan Peak, North Cachar Hills. 
Original description :—* Animal not seen. 
‘‘ Shell flatly convex, periphery oval, solid, not horny; epidermis 
reddish brown ; spire short, apex very flat ; one single body-whorl ; 
peristome simple, thin. 
NE 9 
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