M I N K H A \.0i i IC A I, N () I' KS A N D K KSON . 



209 



Forms and angles : — 



New Hebrides. 



(PI. xli., fig. 2.) 



Our collection contains a few specimens of native sulphur from the 

 New Hebrides, where considerable deposits are found round the fumaroles, 

 particularly in the neighbourhood of Tasowa on Tanna, and on Vanua 

 Lava.13 One specimen, found on Tanna in 1865, consists of crystals 

 thickly deposited on a fine friable matrix resembling volcanic ash. The 

 crystals, which range up to eight mm. in length, are very simple, some 

 showing only the forms c (001) and p (HI), others having faces of *• (113) 

 and II. (Oil) as well. The faces, though interrupted, are smooth and give 

 excellent signals, the measured agreeing well with the calculated angles. 



13 Pelatan — Fide Min. Industry, 1894, p. 517; Mawson — Procs. Linn. Soc. 

 N.S.Wales, xxx., 1905, p. 434. 



