174 Godwin-Austen — On the Opcrculated Landsliells [No. 3, 



Hab.— Dafla Hills. 



This form is a representative here of the Ceylonese G. Bairdii. A 

 variety of the same size but plain, with pale band on the periphery, on 

 Toruputii Peak. Small (major diam. 065 in.) varieties also occur, both 

 ornamented and plain ; the latter are very similar in size and light ochreous 

 colouration to G. ravidus of the Nilgiri Hills, but the former have fine 

 zigzag markings and a single black band on the periphery. 



LaGOCHEILTJS T03I0TREMA, Bs. 



Hab. — The Tanir ridge and Toruputii Peak, — not common. 



Pterocyclos parvus, Pearson. 



Hab. — Shengorh, Tanir ridge, and Torupiitii. 



Pteboctclos magwus, n. sp., PI. VII, Pigs. 3, 3a, & 35. 



This shell is similar in form to P. parvus, only that the winged por- 

 tion of the peristome is far more fully developed and folded round into a 

 perfect, largely developed tube with its internal orifice just within the 

 aperture, the inner lip being deeply notched to give room for it. The shell 

 is ornamented with a single black peripheral band and with minute trans- 

 verse brown zigzag markings. Apex very flat. Whorls 5, rounded. 



The largest example measures — alt. 026, major diam. - 95, minor diam. 

 - 75, apertural tube 0-20 in. 



Hab. — Very common in the outer sandstone range, Dafla Hills. It 

 is also found on the northern side of the Naga Hills, but has hitherto never 

 been separated from P. parvus of the Khasi Hills, of which it may be said to 

 be a more developed form, with stronger affinities to the genus Spiraartum. 



Spiraculttm HISPIDTJM, Pearson, var. mestob. 



Hab. — The outer ranges near Dihiri Parbat. Agrees precisely with 

 specimens from Teria Ghat. It is curious, however, to note that the large 

 variety does not occur here, but that its place is occupied by another new 

 form equally large, which I next describe. 



Spiracttlum Nevilli, n. sp., PL VII, Figs. 2 & 2a. 



Shell discoidal, convexly depressed, widely umbilicated, covered with 

 a dark brown epidermis which soon becomes eroded, and with an incipient 

 dark band on the keel in perfect specimens. Spire very slightly raised, 

 suture deep, whorls 5, much rounded, the last descending slightly towards the 

 aperture. The' sutural tube is only - 10" in length, 0'3" behind the aper- 

 ture, turns back, and is situated close to the suture.. Aperture oblique, circu. 

 lar. Peristome double, inner lip continuous, having at the suture a re-enter- 



