308 JOURNAL OF SCIENCE. 
dip towards each other at rather flat angles in the north-western 
quadrant. 
Besides the ore-bearing layers, Mr. Docherty observed a 
quartz lode and three massive dykes intersecting the schist- 
country. The quartz lode which is about 4 feet thick and well- 
defined, crosses the north and south system of layers at nearly 
right angles in strike, with a nearly vertical dip. No ore of any 
kind has as yet been disclosed in it by surface prospecting, 
though, considering the circumstances of its connection with the 
layers and the behaviour of lodes in many analogous cases, there 
certainly obtains a probability of ores, such as carried by the 
layers, making their appearance in depth. 
Regarding the three dykes, two of them of between 40 and 
50 feet in width each, are composed of granite and run due north 
and south close together near the eastern boundary of the schist, 
crossing the presumable junction-line of the two systems of 
layers. The third dyke runs near the western boundary of the 
schist, showing a thickness of over 100 feet. It consists mainly 
of a mixture of orthoclase, hornblende (Actinolite and Tremo- 
lite), and in places of large patches of asbestos, besides which 
magnetite, chlorite, garnet, and impregnations of copper pyrites 
and pyrite have also been observed. It strikes north and south 
and can be followed from the seaboard of Dusky Sound right up 
the range past a small lake situated on the eastern slope of 
Mount Hodge. At the beach of Dusky Sound there occurs what 
Mr. Docherty considers to be a branch of this dyke, consisting 
of a massive chlorite rock enclosing orthoclase in patches, and 
larger and smaller imperfect crystals, as well as two other 
minerals presently to be described. 
Comparatively speaking the Dusky Sound district, as de- 
scribed, is to my knowledge, next to that of Nelson, perhaps the 
richest mineral locality so far made known in the Middle Island, 
promising on further exploration not only to enrich our Colonial 
museums with specimens of more than average excellence of a 
number of interesting species, but also to initiate advantageous 
exchange with museums of other countries. The species and 
varieties of minerals that have come under my notice in Mr, 
Docherty’s collections are the following :—Chalcopyrite, Pyrite, 
Pyrrhotite, Native Copper, Molybdenite, Galena, Sphalerite, 
Magnetite, Chromite, Rutile, Menaccanite (var. Ilmenite) 
Limonite, Quartz, Orthoclase, Albite, Amphibole (var. Actinolite), 
Tremolite, Common Hornblende, Asbestos, Titanite (Sphene), 
Garnet (var. Almandine), Common Garnet, Ouvarovite (Chrome 
Garnet), Muscovite (var. Common Mica), Fuchsite (Chrome 
Mica), Prochlorite, Epidote, Tourmaline (common black), Steatite, 
Kaolin, Dolomite. Of these have been examined :— 
Ouvarovite (Chrome Garnet).—This interesting, rare variety 
of garnet Mr Docherty, according to information received from 
M. H. Cox, pointed out to me as emerald, though its mode of 
occurence and habitus negatived this supposition, and it required 
but little examination to determine its truecharacter. It occurs 
