JtOLLUSCV OF INDIA. 



39 



Glessula illustris, G.-A. 



I have looked at the type after reading Pilsbry's remarks on 

 this species (Man. Couch, ser. 2, xx. 1909, p. 95, pi. ii. 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, hut it is indistinct 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 crassilnhris. 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 G. facula of 

 Southern India. 



Glbssula illfstris, var. tumida, G.-A. (Plate CLX. fig. 13.) 



Locality. Lukah Valley, Jaintia Hills. No. 3078 B.M. (Ood- 

 win-Austeii). 



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 7i, 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 {Oodw'm- Austen). 



Shell couically turreted, glassy ; sculpture : distant, strong, 

 transverse striiE, 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 7', 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 „ ,, 7'2 ; „ 14-75 ,, 



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 Kiver, 

 in the high grass of old jooms, i. e. 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 iu the following places, specimens from which are figured. 



No. 3552. From North Khasi. 



One verj' large specimen figured 16 x S'25 mm. (Plate 

 CLX. tig. 14.) 



