MOLLDSCA or INDIA. 33 



GLT:ssnLA tenuispiea, Bs. Coll. Hj-. Blf., No. ]1.0.iii.l5 B.ll. 

 (Plate CLIX. fig. 3.) 



Locality. Teria Ghat, Khasi. 



Henry Blanford's collection contains 4 specimens from that 

 ])lace, and I have 10 others (No. 1016 B.M.) collected by myself. 

 The largest of these measures 31 mm. long by 8j breadth at the 

 aperture. It diifers in form very considerably from what has been 

 hitherto known as tenuispira of Darjiling and ISikhim, which 

 I have named and separated as longispira. 



Glessula (Eishetia) TENDI8PIEA, Bs. ll.O.iii.lo B.il. (Plate 

 CLIX. fig. 3.) 



Locality. Teria Ghat, foot of Khasi Hills {ex 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 lO'o, slightly 

 convex, proportion of spire to last whorl lUO: 29; aperture oval; 

 cohiniellar 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 33 mm. in length. 



Glessitla (Eishetia) tencispiea, Bs., var. No. 3332 B.M. 



Locality. Garo Hills, a single specimen {Oodwin- Austen), 



Shell more slender in form; sculpture smoother than the Teria 

 Ghat examples of tenuispira ; 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. S. W. Kemp, of 

 the Indian Museum, has recently collected Glessula tenuispira 

 at Tura in tlie 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 sp\irs overlooking the great 

 marshes of Sylhet and Mymensing. Dissection shows the 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. 



TAKT I. D 



