84 LAND AND FRESHWATER 
finding and lumping the species together, and gleaning them even- 
tually out, to be inserted finally in their more natural positions. 
The next character I turned my attention to was the odontophore. 
On going over my own collection I found, not having boiled and 
remoyed the animals save of the very large kinds, that in a number 
of specimens the animal still remained in a hard dried-up state. 
Placed in water, not only can the mantle-lobes be distinctly made 
out, but the buccal mass and, what was of equal importance, the 
reproductive organs and, in several instances, the spermatophores 
were secured. 
I shall give drawings of such parts when describing the different 
species ; although incomplete as a whole, in many cases I think it will 
be allowed that they are of considerable value specifically, considering 
how difficult, almost impossible, it will be for many years to collect 
some of these shells again. I also possessed a few specimens pre- 
served in spirit, which have proved of great use. 
The genitai organs present us with good specific differences ; 
but, as Stoliczka warns us, they must not be taken as certain evi- 
dence, at least not until a very great number of examples have been 
examined at different stages of growth and at different periods of 
the year; for it can be easily understood that in a soft animal like 
a mollusk such organs do undergo very great modification and en- 
large at different parts, and that we should expect to find their con- 
dition during the period of rest in the cold season different to that 
during the rains, when they are in their most active state and the 
process of reproduction going on. These remarks also hold good 
with respect to the lobes of the mantle, which in moist weather are 
much more lengthened and expanded. Yet this cannot modify to any 
great extent the relative position of the different parts or other acces- 
sory organs. 
Of small size ; sculpture smooth ; globosely conoid. 
MaAcrocHLAMYs LONGICAUDA, n. sp. (Plate XVII. fig. 1.) 
Locality. Cherra Poongee (H. H. G.-A.). 
Shell subglobosely conoid, last whorl rather swollen ; no sculpture 
visible to eye alone, but crossed with very fine raised lines oblique to 
each other under high power; colour horny brown; spire mode- 
rately high, sides rather flat; suture shallow; whorls 53, sides 
slightly convex ; aperture widely lunate; peristome thin, suboblique 
near axis. 
Size: major diam. 5°6 mm., alt. axis 3-1 mm. 
# 0-22inch, ,, 0°12 inch. 
MacrocHLamys Lonelcaupa, var. (Plate XVII. figs. 2, 2 a.) 
Locality. Maotherichan Peak, N. Khasi (H. H. G.-A.). 
Shell globosely turbinate, closely perforate ; sculpture none, sur- 
face like ground glass; colour pale ochre ; whorls 54, the last sub- 
angulate at the periphery ; aperture suboblique, narrowly lunate ; 
Be eiome thin, the columellar margin perpendicular and slightly 
reflected. 
