Cox.—On the Mineralogy of New Zealand. 423 
better parts of this rock will probably prove a valuable ore of chrome, and 
some of second class quality may possibly be sufficiently concentrated to 
render them of-value. 
Analyses of Chrome ores from the Nelson district show that an average 
percentage of 50°62 Cr, O; has been obtained from samples forwarded, and 
that half of these yield over 55 °/, Cr, O,, proving the Nelson Chrome ores 
to be of considerable value. These analyses varied as follows from the 
different localities :— 
Starveall ee isk se ... 44°21 per cent., Cr, O;. 
Little Ben Nevis ws eas OER to BOSE 5 8 - 
Aniseed Valley ... ne ... 41°16 to 42°65 ,,_,, ” 
Maungatapu... ae .. 80°18 to 64°26 ,,_ ,, ” 
Adams Lode ... a awe SLL to GOGS. ” 
Croixelles nae eae Ri ww eet Se ” 
Wangamoa ide ce - S217 to 64:30... ns ” 
Dun Mountain... .. ... 44°61 to 68°72 ,,° 5, - 
Lake Harris Range, Otago 61-24 ,, ” 
Chromite has been found at Jeske 8 es, where it ss occurs as a 
constituent of the rock Dunite. Specimens were first forwarded by Mr. D. 
Macfarlane, Government Agent there, in 1877. 
It was also discovered by Dr. Hector, associated with Nephrite, in 
Milford Sound, and is mentioned in the Jurors’ Reports N.Z. Ex., 1865, 
P. 265, as follows :-— 
‘The large block of Nephrite, which weighs 200 Ibs., and was brought 
by Dr. Hector from Martin’s Bay, is speckled with this mineral (Chromite) 
in small grains. This interesting rock is therefore in all probability a local 
Variety of the Dunite, which forms the matrix of the Chrome ore in Nelson.” 
Chromite of rich quality and granular structure has also been found at 
Milford Sound as a rolled fragment; it was associated with Steatite (Liver- 
sidge, “Trans. N.Z. Inst.,” vol. x., p. 504) as well as another specimen 
from Moke Creek, Queenstown, and one brought by Mr. McKay from the 
Lake Harris Range, Otago, which yielded 61-24 °/, Ors Os. 
Uranium. 
Uranium has not yet been found in New Zealand. 
ManGanEsE. 
This metal occurs in nature chiefly in the form of various oxides, the 
main divisions of which are the hydrous and anhydrous ores. 
Anhydrous Ores. 
Pyrolusite, Min.—H. 2 to 2°5, colour iron-black to dark steel-grey, some-— 
times bluish: streak black; opaque; rather brittle. ‘This mineral was dis- 
soered on the cast coast of the Antland ditt in 1878, « pecinen ce 
