106 LAND AND FRESHWATER 
The odontophore consists of 109 rows of teeth, the formula being 
5O sk dled aA 58 
638 .°1.763 
The centre tooth is tricuspid, two short cusps at the base of the 
long central; the median teeth have a single outer basal cusp; the 
laterals are bicuspid, the outer points rather shorter than the inner, 
but rising gradually as they approach the margin of the lingual 
ribbon (Plate XXVIII. fig. 1). 
The generative organs (Plate XXVIII. fig. 1 a) are as in MW. indica, 
the spermatheca being longer. There are, however, some differences 
in the penis; the kalc-sac is very long, a flagellum-like appendage, 
in which a partially formed spermatophore could be detected (fig. 1 6), 
the gland of the retractor muscle, which is in the form of a sort of 
coiled cecum, and which appears to be developed from a part of the 
duct being bent and laid together for a portion of its length and then 
coiled on itself from the extreme end; and at this point, as in so 
many of these Indian genera, the retractor muscle is given off. 
Thus as regards the odontophore and generative organs consider- 
able modifications exist in comparison with M. indica. 
MAcROCHLAMYS HARDWICKEI, n. sp. (Plate XXIII. fig. 2.) 
Locality. Chatak, on Barak river, Sylhet District, Lower Bengal. 
Shell umbilicated, subdepressedly conoid, thin, surface dull glassy ; 
sculpture beautifully and regularly striate longitudinally, but very 
fine (Plate X-XI. fig. 9, sylhetensis, MS.); colour pale corneous ; spire 
depressed, apex rather blunt; suture adpressed; whorls 6, the last 
rapidly enlarging, rather tumid below; aperture subvertical, glo- 
bosely lunate; peristome thin, the columellar margin nearly vertical 
and but slightly reflected at the umbilicus. 
Size: major diam. 16°2, minor diam, 14-2, alt. axis 6-8 mm. 
35 0-64, 5 O56, ,,,. O2fanch, 
The animal is thus described in my field note-book :— With long 
foot, light faint green, pink at the extremity of the foot ; underside 
of the foot of a pale orange-colour, of a richer tint near the mouth. 
Eye-pedicels of a light neutral tint. Mantle rather expanded. Ten- 
tacles very long, the oral drooping. Extremity of foot glandular, 
rather truncate, lobe above small ”* (Plate XVIII. fig. 4). 
MacrocHLamys HARDWICKEI, Var. 
Locality. Barowli river, Durrang District, Assam (J. Burt). 
Shell depressedly conoid, umbilicated, smooth, transparent; sculp- 
ture fine longitudinal strie, 3=;,),, mch; colour very pale dull 
olive-brown or horny; spire depressed ; suture adpressed, shallow ; 
whorls 6, flat on spire, rounded on the last and moderately swollen ; 
aperture widely lunate, subvertical; peristome thin, straight, and 
nearly perpendicular on the columellar margin, very slightly reflected ; 
umbilicus small but open. 
* No mention is made of the linguiform appendages to mantle, but they were 
probably overlooked. 
