40 LAXD AND FRESHWATER 



Size : Fig. 5. Type, major diam. 8-5 ; alt. axis 320 mm. 



Largest bleached shell, „ 9-2 ; „ 35'0 ,, 



This species was given to me liy Colonel Maxwell ; obtained on 

 one of his tours in the Naga Hills, East of the Anghami Naga 

 tribe. 



Glesstjla (RisnETiA) siAsTKESi, n. sp. Type. (Plate CLXII. 

 fig. 1.) 



= macera, Nev. MS. from Assam. 



Locality. Golaghat, Assam ; 3 specimens found. Blf. Coll. 

 843.06.1.'l B.M. (J/nsfcrs). Same locality. 4U.00.3. B.M., 2 ex- 

 amples ; 837.00.1.1 B.M., 5 examples. 



Shell elongately turreted ; sculpture distant striation ; colour 

 pale ochraceous ; spire long, sides flat; apex is fine, increasing 

 gradually (PI. CLXIII. fig. 2U ; another specimen No. S37.0<i.l.I 

 15.M., Blf. Coll., from same locality, PI. CLXIII. fig. 22), suture 

 shallow ; whorls 9, very flatly convex : proportion of spire 

 to last whorl 100 : 49, having a slight shoulder below the suture ; 

 aperture rather narrow ; columcUar margin nearly vertical. 



Size : major diam. 6-5 ; length IT'o mm. Largest specimen, 

 apex broken, major diam. 7'0. 



It. is very close to G. sarissa, Bs., but side of spire differs. 



This species was found in Dr. W. T. Blanford's collection and 

 unnamed. It was sent to him with other shells found by 

 Mr. Masters in 1860, on the low spurs near the hot spring at 

 the Falls of the Namba Uiver, the home of that fine species 

 llhinstoma mastersi, figured in the ' Concbologia Indica,' 1870, 

 pi. V. fig. 1, without description, as Pieronjdos {S]nraculum) 

 mastersi, Blanford iLSS., afterwards described by ^\■m. Blanford in 

 Journ. Asiat. Hoc. Bengal, 1877, pt. 2, p. 313, as from hills south 

 of the Assam Valley not far from Golaghat. Some years later 

 I happened to encamp at the exact locality as given above. The 

 shell is hairy in fresh specimens, as stated by Blanford. 



Among the Glessuke since recorded from the Indian Mu.seum, 

 under No. 80, Nevill, ' Hand-list,' p. 170, no. 3639, are some 

 12 examples of mastersi from Assam, labelled W. Blf. with the 

 ijaine "macera" in Nevill's handwriting. Writing to me in 

 August 1880, Nevill gave this name to all the sheUs catalogued 

 under No. 80. G. macera is a very distinct and attenuate species. 



Glesstjea (Rishetia) masteesi, n. sp., var. (Plate CLXII. fig. 3.) 

 No. 3339 B.M. 



Locality. Augaoluo Peak, 6777 ft., Naga Bills, 2 specimens 

 (M. Ogle). 



Sculpture: the embryonic whorls (Plate CLXIL fig. 21) are 

 strongly costulate next the smooth apex, and regularly so to 

 the last whorl ; colour dark umber-brown ; whorls 9. 



Size : major diam. 7-0 ; alt. axis 20-0 mm. 



Agrees with the Golaghat specimens. 



5 other S])0cimcus were obtained in the Naga Hills ; precise 

 locality not noted. 



