MOLLUSCA OF INDIA, 247 
Pfeiffer did not describe this subgenus, which was based on shell- 
characters alone. He included in it the following species :— 
Nanina labiata, Pfr. 
orobia, Bens., = Oaytes. 
-—— tugurium, Bens., = Macrochlamys. 
—— splendens, Hutt.,= Macrochlamys. 
—— afra, Pfr, 
The last, from the Cape of Good Hope, is not likely to be in any- 
way related subgenerically to a Himalayan form. 
‘Specimens of the Mussoorie species /abiatw have been most kindly 
sent me by Mr. J. B. N. Hennessey, F.R.S., of the Indian Survey 
Department ; I am thus able to give a description of the animal, 
Animal, The mucous pore has a broad overhanging lobe. The 
right dorsal lobe simple, with no right shell-lobe; the left dorsal 
lobe is divided into two parts, as in the genus Oates ; the posterior 
portion is isolated and not well developed, yet somewhat larger than 
in Owytes cycloplax, The animal is also similar to Oaytes in its 
markings and in the form of the extremity of the foot. 
The generative organs (Plate LXI. fig. 5) are on the same plan, 
and may be compared with those shown on Plate XXXI. fig. 7 
and Plate XXXII. fig. 5, particularly well seen in the male organ. 
There is therefore no necessity for repeating the description: the 
amatorial organ (D) is long and there is a lengthened pointed cecum 
or kale-sac (K). I examined two specimens and was rewarded 
by finding in the spermatheca (sp) of the specimen on Plate LXI. 
fig. 5, a bundle of perfectly developed spermatophores of beautiful 
structure; {his was a most interesting discovery, for the form this 
organ assumes in this group of land-shells I do not think has yet been 
described. The single spermatophore or capreolus is a long, narrow, 
chitinous ribbon, folded on itself longitudinally to form a shallow 
gutter (see fig. 5¢, which is magnified 4 times); the edge or rim of 
the gutter is set at regular intervals with little spikes bifid at the 
point ; they increase in size from one end (f") towards the broader 
end of the spermatophore (f'), which at last widens into a spatula- 
like or probe-like end (5 f). Here the long bag or sack is attached 
and the thin membrane is probably continuous over the open part 
of the gutter-like portion below; this bag terminates in a hard 
nipple-like end or capsule. 
The odontophore does not compare with that of Oxytes in any 
way, either in general form (as a set) or number in each row, the 
central and median teeth being much more like the ordinary form seen 
in Macrochlamys ; and yet the unicuspid laterals that come in about 
the 86th tooth are, however, similar to those teeth in Owytes, a sort 
of passage, as it were, from one to the other. The central tooth 
(5 a) is strongly tricuspid, the median with an inner high cusp and 
an outer lower cusp; the lateral (5 a’) are bicuspid, with the outer 
remote from the point disappearing at the 36th to 38th tooth (5 a’) ; 
unicuspid teeth follow, and the outermost laterals (5a'") are yery 
minute. 1 
