44 The N.Z. Journal of Science and Technology. [Jan. 
14. Little Ben Nevis. Lab., No. 15, 1880, p. 40 ; No. 16, 1882, p. 34 ; 
Cox, 1882 report, pp. 2, 3, 6, 7 ; Trans., vol. 14, pp. 422, 423 ; 
Bull. No. 12, p. 62. 
15. Mount Starveall. Lab., No. 15, 1880, p. 40 ( v ‘ Mount Stawell ”) ; 
Cox, Trans., vol. 14, 1882, p. 423 ; McKay, C.-ll, 1896, 
pp. 30-31. 
16. Pelorus Valley. Lab., No. 33, 1900, p. 19 ; Geological Survey manu¬ 
script (in gravels of Pelorus River, eastern branches). 
17. Takaka district. Lab., No. 33, 1900, p. 19. Upper Takaka Valley 
(Cobb River, &c.). Lab., No. 40, 1907, p. 23 ; Geological Survey 
manuscript and specimen. 
18. Ultra-basic rocks of north-west Nelson. Bull. No. 3, 1907, pp. 66, 
67, &c. Also in gravels, Appo’s Flat. Bull. No. 3, p. 54. 
19. Westport district, in gravels. Bull. No. 17, 1915, pp. 115, 116, 117, 
122, 192. 
20. Mirfin Creek (tributary of Otututu), Reefton district. Bull. No. 18, 
1917, p. 110, analyses Nos. 13 and 14. 
21. Greymouth district, in gravels. Bull. No. 13, 1911, p. 91. 
22. North Westland. Lab., No. 40, 1907, p. 23. See also next entry 
on list. 
23. Ultra-basic rocks of North Westland. Bull. No. 1, 1906, p. 67, &c. ; 
No. 6, 1908, pp. 122, 125, 126. 
24. Jackson’s Bay district. Cox, Trans., vol. 14, 1882, p. 423. 
25. Red Hill or Mountain, north-west Otago (about nine miles east of 
Big Bay). Park, 1888 report, pp. 129, 136. 
26. Martin’s Bay. Cox, Trans., vol. 14, 1882, p. 423 ; Lab., No. 39, 
1906, p. 12. 
27. Milford Sound. Liversidge, Trans., vol. 10, 1878, p. 504; Cox, 
Trans., vol. 14, 1882, p. 423. 
28. Lake Harris Range, Otago. McKay, 1881 report, p. 143; Cox, 
Trans., vol. 14, 1882, p. 423 ; Lab., No. 16, 1882, p. 34. 
29. Moke Creek, Queenstown. Liversidge, 1878 ; Cox, Trans., vol. 14, 
1882, p. 423. 
The chrome-iron ore is everywhere associated with ultra-basic igneous 
rocks—peridotites of various types—which, as a rule, have been altered or 
partly altered to serpentine. This is its mode of occurrence throughout 
the world. There are places in New Zealand, as well as elsewhere, where 
chromite occurs in stream-gravels, but without doubt it has been derived in 
every case from peridotitic rocks or serpentine. The chromite may occur 
disseminated through the ultra-basic rock, or concentrated in pockets or 
bunches of varying size and purity. Concentration is believed to have 
invariably taken place while the containing rock was in a molten or partly 
molten condition by the influence of gravity and other factors, the process 
being generally designated by the somewhat vague term “ magmatic segre¬ 
gation.” There being no definite lodes, and the pockets inclining to be 
small rather than large, exploration for chromite is attended by a good deal 
of chance, and when pockets are found and mined the final result is likely 
