MOLLUSCA OF INDIA. és 85 
Size: major diam. 4:3 mm., alt. axis 3-1 mm. 
ae O:17fAnchs, “34\e0:42 anche 
Size of specimen from Maosmai, near Cherra Poongee: major 
diam. 0°20, alt. axis 0°11 inch. 
Other localities: Banks of the Mankén, North Jaintia, and 
Jawai. 
The dried-up animal being apparent in two of the specimens from 
Cherra Poongee, these were soaked in water for a few days; and I 
was rewarded by the form of the animal coming out most distinctly, 
as shown in the drawings made from it, placing it and the allied 
forms without doubt in this genus. The right shell-lobe is tongue- 
like, and the small left lobe is present (Plate XX. fig. 16). The 
overhanging lobe above the mucous pore at the extremity of the 
foot (Plate XX. fig. 1) is developed to a great extent; and of this I 
have the sketch from life in my note-book (fig. 1a) *, together 
with the following description :—*‘‘ Animal when fully extended 0:45 
to 0°5 inch long. Tentacles of full size; body thin, of a light pale 
colour, with thin line of dark grey on upper surface to the extremity 
of the foot ; the gland here is large for the size of the animal, and pro- 
trudes upwards above the level of the back: in fully developed shells 
the animal is darker about the head.” [also detected the amatorial 
organ, and the odontophore and jaw are also figured (Plate XX. 
figs. 1e-le). The former differs very considerably from that of the 
typical Macrochlamys indica in the smaller number of the median 
teeth and their elongate form. The laterals have the same bicuspid 
form; but their number is quite double. Thus in M. longicauda 
the formula is 
LO tO.S0 2d. Oh . ome). 1 0,.t0 SU; 
or 84.1. 84, 
as against 45 . 1 . 45 in M. indica. 
The jaw has no central projection, being slightly concave on the 
cutting-edge. 
The central tooth is long with convex sides, and with two small 
denticles on either side low down near the base; the next five are 
also long and narrow, with a single small tooth on the outer side ; 
in the sixth and seventh this outer tooth rises and is nearer to the 
point of the main cusp, and in the eighth and ninth still more so. 
From the tenth to the outermost all are bicuspid, becoming gradually 
smaller in size. 
MacrocuLaMys Lonercaupa, var. (Plate XVII. fig. 4.) 
Locality. Marangsip Peak, North Cachar Hills (17. H, G.-A.). 
Shell closely perforate, globosely conoid, rounded below ; sculp- 
ture none, save a few lines of growth; colour, pale ochraceous epi- 
dermis ; spire conic, sides flat ; suture moderately impressed ; whorls 
5, sides flatly convex ; aperture elongately quadrate ; peristome thin, 
reflected slightly at axis, and subvertical. 
* Tn this character it resembles Semper’s genus Macroceras from Samar, one 
of the Philippines ; but there is no other similarity. 
