iiOLiASCA or ixDi.v. 267 



Macrochlamys terminalis, Gr.-A. (Plate CXXXI. fig. 8.) 



Locality. Lhota Naga Hills (Wm. Chennell). 



8liell iiatly conoid, glassy surface, scarcely perforate ; sculpture 

 fine regular lougitudinal striation ; colour uraber-brown ; spire 

 low, apex rouuded ; suture impressed ; whorls 6, increasing very 

 regularly to the aperture ; aperture lunate, subvertical ; peristome 

 thin; coluinellar margin oblique, not thickened and very slightly 

 reflected. 



Size : maj. diam. ll-7o, min. 11-5 ; alt. axis 50 mm. 



There are some ten specimens from the above locality and four 

 from the Diyung Valley, Singpho Hills, found by Mr. Ogle ; these 

 last are flatter. This species is remarkably like M. terminus, and 

 M'hen describing that species I gave the Diyung Valley and Lhota 

 Naga Hills as two of its habitats. On finding that the sculpture 

 was so different, 1 looked more closely at them, and found the coil 

 of the whorls and the very close perforation clearly separated 

 them. The two drawings of the shell seen from above, show the 

 greater increase in the size of tlie last whorl in 31. terminus. 



Macrochlamys? dikrangensis, n. sp. (Plate CXXXI. fig. 5.) 



Locality. Dikrang Valley, Dafla Hills (Godwin-Austen). 



Shell imperforate, depressedly conoid, base fiat ; sculpture 

 distinct irregular fine longitudinal striation, with regular trans- 

 verse waves of growth which to the eye give a costulate appear- 

 ance ; colour pale ochraceous, pale olivaceous spots on the animal's 

 body showing through the shell ; spire flatly conoid, sides slightly 

 convex ; apex rounded ; suture shallow ; whorls 6|, closely wound, 

 retfularly increasing, the last slightly descending ; aperture oblique ; 

 peristome somewhat thickened, sinuate on the lower margin ; 

 columellar margin very obliqtie, rather thickened, not reflected. 



Size: maj. diam. 1^-6, min. 12-75 ; alt. axis 6*5 mm. 



This is the species which Nevill in his Hand-list considered a 

 variety of No. 137. Nanina (Microcystis) petasus, Bs. p. 35 

 (" ? distinct species "), " 2 Dikrang, type var." 1 had given these 

 to the Indian Museum on my return from the Dafla Expedition, 

 and Nevill returned one of them to me, this I have figured ; the 

 other should be in Calcutta. These came from the forest 

 bordering the Dikrang Eiver. I have specimens from Toruputu 

 Peak, 5000 ft., of same size, rather smoother ; from Tanir Peak, 

 much smaller, only 9 mm. in' major diameter (10 Tanir of Nevill's 

 Hand-list, p. 35). It was found also on Shengorh Peak and at 

 Borpani ; it is a common shell in these hills. 



The animal was not seen, and there is considerable doubt as to 

 its being a Macrochlamys. When it is examined, it is not improbable 

 a new genus will have to be made, which canuot be done on shell- 

 character alone. 



