MOLLUSCA OF INDIA. 33 
GLEssuLA TENUISPIRA, Bs. Coll. Hy. BIf., No. 11.9.iii.15 B.M. 
(Plate CLIX. fig. 3.) 
Locality. Teria Ghat, Khasi. 
Henry Blanford’s collection contains 4 specimens from that 
place, and I have 10 others (No. 1616 B.M.) collected by myself. 
The largest of these measures 81 mm. long by 82 breadth at the 
aperture. It differs in form very considerably from what has been 
hitherto known as tenwispira of Darjiling and Sikhim, which 
I have named and separated as longispira. 
Gressuta (RisHEria) TENUIsPIRA, Bs. 11.9.iii.15 B.M. (Plate 
CLIX. fig. 3.) 
Locality. Teria Ghat, foot of Khasi Hills (ev coll. H. F. Blan- 
ford). 
Shell elongately turreted; sculpture striation distant, closer, 
finer, and regular towards the apex; colour ochraceous, with 
decided green tint; spire long, apex rather blunt, sides nearly 
straight, slight convexity; suture impressed; whorls 10:5, slightly 
convex, proportion of spire to last whorl 100: 29; aperture oval; 
columellar margin rather straight. 
Size: major diam. 9:0; length 29:0 mm. 
I obtained this species at Teria Ghat and also in the West 
Khasi Hills, some dozen specimens (No. 1582 B.M.), the largest 
being 35 mm. in length. 
GuussuLa (RisHETIA) TENUISPIRA, Bs., var. No. 3332 B.M. 
Locality. Garo Hills, a single specimen (Godwin-Austen). 
Shell more slender in form; sculpture smoother than the Teria 
Ghat examples of tenwispira; colour ochraceous umber-brown ; 
Spire, apex fine; whorls 11, 100: 40:4; aperture narrowly ovate. 
Size: maj. diam. 8:0; length 27°25 mm. 
Specimen from above Tura, 10 x 29°8. 
It is of considerable interest to note that Mr. 8. W. Kemp, of 
the Indian Museum, has recently collected Glessula tenwispira 
at Tura in the Garo Hills, extending its range from Teria Ghat 
thus far to the west some 100 miles. Throughout this distance, 
the conditions are the same (tropical forest and for half the year 
excessive rainfall) on the steep spurs overlooking the great 
marshes of Sylhet and Mymensing. Dissection shows tke animal 
to have all the characters of the species I describe under longispira 
of Darjiling and Sikhim. It marks the western extension of the 
subgenus—this also falls in with the geological evidence we 
possess, that the Garo—Khasi area was in early Tertiary time much 
more intimately connected with the South-Eastern Himalaya on 
the north and not so markedly cut off as now by the broad low 
valley of the Brahmaputra, filled with alluvial deposits of great 
thickness. 
PART I. D 
