510 LIEUT.-COL. H. H. GODWtN-AUSTEN ON NEW [JunC 14, 



this, aided by the additional material sent me by Mr. Aldrich, to 

 whom my very sincere thanks are due and also to Mr. Doherty who 

 collected them. This gentleman has extended the area of country 

 now collected in much farther to the east, up to Margarita, as I 

 mentioned before ; and these Naga Hills, inhabited by the most 

 Eastern representatives of this race, must not be confounded with 

 the Naga Hills inhabited by the Anghamis, which are 150 miles to 

 the westward. Thus one box containing a number of only partly 

 sorted tubes sent me by Mr. Aldrich had simply Naga Hills attached 

 to it. As Mr. Doherty's letter, also enclosed, was dated from Kohima 

 in the Anghami Naga Hills, I naturally at first concluded they were 

 from that part. Fortunately, I afterwards found series of the same 

 species in tubes in another box, marked "Margarita." It shows 

 how very carefully labelling should be done in the field. 



Looking over a large series of the species of this genus, it is 

 of interest to note the much larger size of so many of the species 

 from the Naga Hill-ranges, as compared with those in the Khasi and 

 Garo Hills and the Himalayas. The change commences with 

 the rise of the Burrail Tertiary range, near Asalu. None of the 

 Khasi Hill species approach them in size. 



D. scalaria, from the Garo side, is one of the largest, and that is 

 only 3°5 millim. in height of spire ; while D.pachycheilus, 4*8, or say 

 5 millim., is the single large species from Darjiling. At Asalu we find 

 D. insignis 6*5 millim., D. tumida 5 millim., D. convoluta 6'25 millim., 

 and, as will be seen in the new forms described in this paper, six are 

 5 millim. in height and over, two of them reaching 6 millim. 



Oi D.janitiaca, G.-A., one example was sent from Margarita. 



Constriction in front, above the peristome ; sculptured throughout. 



DiPLOMMATINA DECOROSA, U. Sp. 



Loc. Anghami, Naga Hills {W. Doherty, in coll. T. H. Aldrich). 



Shell elongately fusiform, not riniate ; sculpture, fine, close, regular 

 costulation on all the whorls ; colour pale whitish horny ; spire, 

 sides somewhat flat, apex rather acuminate, rapidly diminishing ; 

 suture moderately impressed ; whorls 8, sides flatly convex, penulti- 

 mate and antepenultimate equal ; constriction above the aperture, 

 towards the outer margin ; aperture ovate, rounded below ; peristome 

 thickened ; columellar tooth small, in front. 



Size: maj. diam. 2*5 ; alt. axis 5"5 millim. 



There was one solitary specimen in my collection of this species 

 from north of the Burrail, and 6 specimens, but smaller in size (4*5 

 millim. in height of spire), from the peak of Shiroifurar, in the 

 Lahupa Naga Hills, north of Munipur. Mr. Aldrich's collection 

 contains a large number, and I have selected the type out of these. 



On the boss of trap rock near the village of Phunggam I found 

 a number of a small variety, 4*5 millim. in height of spire, but 

 differing in no respect, except in size, from the typical species, only 

 that they are all of a pale sea-green tint. 



The same form occurred on Kopamedza Peak, with this difference, 



