MOLLUSCA OF INDIA. 29 
apex very blunt and rounded, sides flatly convex; suture mode- 
rately impressed; whorls 7, sides very flatly convex; aperture 
oval ; peristome outer tip thickened; columellar margin slightly 
convex, nearly straight. 
Size: maj. diam. 9°5; length 22 mm. 
The above peak, a trigonometrical station, is situated on the 
watershed of the Patkai Range and is 6900 feet in altitude. It 
was first visited in the cold season of 1884-85 by Colonel Wood- 
thorpe, R.E., with his assistant Mr. Ogle, and they were 
accompanied by Mr. Tom D. La Touche of the Geological Survey, 
who published an excellent account of Geology of the Upper 
Dihing Basin, Singpho Hills. 
GLESSULA MAIAMENSIS, n. Sp. (Plate CLX. fig. 11.) No. 29 B.M. 
Locality. Diyung Valley, Singpho Hills; two specimens (J/. 7’. 
Ogle). 
Shell is more elongate than the type; colour is greener; side of 
spire rather flatter; aperture rounder, from the outer lip having 
more convexity. All the kind of diversity the shells of this genus 
present, particularly when a large series is obtainable. 
Size: maj. diam. 8°5; alt. axis 20°S mm. 
GLESSULA DIHINGENSIS, n. Sp. 
Locality. Dihing Valley, Assam (type No. 3251 B.M.); some ten 
specimens (J/. 7’. Ogle). No. 1600 B.M. from Sonari Tea Garden, 
near Sadiya. (Plate CLXIV. fig. 4, apex.) 
Shell elongate, turreted ; sculpture: very smooth generally, fine, 
close, rather strong ribbing near and below the suture; colour 
umber-brown ; spire long and fine; suture impressed ; whorls 10, 
the last short; aperture ovate, small; columellar margin well 
curved. 
Size: maj. diam. 5:0; length 18:0 mm. 
This is not unlike G. macera, but the whorls are not so close 
and the last is longer in proportion to those above, 7.¢., a more 
tumid basal one. Specimens from Sadiya (No. 8151 B.M., 10 in 
number, collected by my old assistant Mr. Ogle) differ in colour, 
being a very pale ash, the largest of 9 whorls measures 
21x 525 mm. I have also two examples from Sonari Tea 
Garden, 15°5 mm. in length, sent me by Mr. S. E. Peale, very 
finely and closely striated. 
4a. Abor Hills and Tsanspu Valley. 
Glessula oakesi, n. sp. Pl. CLX. fig. 15. 
aborensis, 0. sp. PL ODXIT. fig.’ 4. 
