MOLLUSCA OF INDIA. 39 
GLESSULA ILLUsTRIs, G.-A. 
I have looked at the type after reading Pilsbry’s remarks on 
this species (Man. Conch. ser. 2, xx. 1909, p. 95, pl. u1. figs. 13-16), 
The vertical striation and grooving is irregular, but this is generally 
the case in the genus; on the apical whorls it is more regular. 
There is certainly fine spiral striation, but it is indistinet and not 
to be seen in some specimens; the suture is also not always 
crenulate. The striation on the embryonic whorls is very similar 
to that in crassilabris. The examples from the Luka Valley in the 
Jaintia Hills (3078 B.M.) may be very well considered a var. 
tumida, 
Beddome erroneously considered it the same as Gt. facula of 
Southern India. 
GLussULA ILLUSTRIS, var. TUMIDA, G.-A. (Plate CLX. fig. 13.) 
Locality. Lukah Valley, Jaintia Hills. No. 3078 B.M. (God- 
win-Austen). 
Shell ovate; sculpture: regular, incised striation, somewhat 
distant; colour strong ochraceous with slight olivaceous tint; 
spire moderately high, conic, sides flatly convex; suture rather 
shallow ; whorls 74, the last tumid, sides slightly convex ; aperture 
widely oval, vertical; peristome slightly thickened; columellar 
margin rather short, subvertical. 
Size: maj. diam. 13°75; length 16:2 mm.; length to body 
whorl 100: 62, 
GLESSULA CRASSILABRIS, Bs. 3435 B.M. (Plate CLX. fig. 17.) 
Locality. Teria Ghat (Godwin- Austen). 
Shell conically turreted, glassy; sculpture: distant, strong, 
transverse striae, very irregular as regards distribution and relief, 
near suture, very fine; colour bright ochraceous with a green 
tint; spire fine and pointed, sides flatly convex; suture well 
impressed ; whorls 74, with considerable convexity; aperture ovate ; 
peristome outer margin well thickened ; columellar margin concave. 
Size: (Sp. figured) maj. diam. 6°0; alt. axis 13-4 mm. 
The largest ,, wees ou) LAS Oe. 
Note from Field Book.—Animal with tentacles black throughout, 
body short, under side of foot pale yellow. The largest specimens 
were obtained in North Khasi, near Simleng on the Lubah River, 
in the high grass of old jooms, 7.¢. the clearings of virgin forest, 
first cut down, then burnt and cultivated. 
This species has locally an extended range, compared with other 
species, and it varies much in size, form, and colour. It is a very 
common species at Teria Ghat, the original locality, and I found 
it in the following places, specimens from which are figured. 
No. 3552. From North Khasi. 
One very large specimen figured 16 x 8°25 mm. (Plate 
CLX. tig. 14.) 
