88 
The Queensland Naturalist 
Nov., 1928 
etum of Harvard University. The nearest floral affinities 
seem to be with Australia, the two countries having sev- 
eral genera in common not found elsewhere. 
The New Hebrides, the Solomons and the Santa Cruz* 
groups were described as probably the least known parts 
of the Pacific botanically. 
EVENING MEETING, 20th AUGUST, 1928.— Mr. 
D. A. Herbert presided. Mrs. E. B. von Steiglitz and Miss 
Stanford were elected members of the Club. The princi- 
pal business of the meeting was a lecture by Mr. B. 
Dunstan, Government Geologist, on — 
MOUNT ISA: ITS PHYSIOGRAPHY AND GEOLOGY. 
Mr. Dunstan mentioned at the outset that he and 
his party found, when in the Templeton River area, near 
Mount Isa, countless numbers of trilobites (fossil crus- 
taceans, belonging to the Palaeozoic period), and Pro- 
fessor Edgeworth David considered the fossilised evi- 
dence as belonging to this so-called pre-Cambrian period, 
that fixed the age fairly definitely of the Cloncurry series. 
If he was correct in defining the remains as fossil forms, 
it would mean that he had identified forms of life earlier 
than any other form of life in the world. 
Mr. Dunstan also had something to say about the 
Mica Creek mica deposits, close to Mount Isa, and also 
about some very old geological formations to the west of 
Glenormiston, near the Northern Territory border. The 
coloured lantern slides used to illustrate the lecture de- 
picted the condition at the Mount Tsa mines, both above 
and below the surface, not the least interesting being a 
picture of some of the pioneer “gougers,” and another 
of the spot where Campbell Miles, the discoverer of Mount 
Tsa, hesitated whether to take the advice of his friends 
and leave the lead deposits alone, and go on to the copper 
lode, for which he was making, or peg out leases at the 
outcrop he had just discovered. Mount Tsa, the lecturer 
explained, was named after Isabelle, a young niece of 
Campbell Miles, of Sydney. 
Some interesting sections were also shown to illustrate 
the extraordinary size and values of the various Mount 
Isa lodes, one of which — the Black Star — had a width of 
212ft. Tt was this latter deposit which was now being 
prospected with a diamond drill to determine the charac- 
ter of the lode at a depth greater than 1000ft. In one 
section of the Black Star ore beds, Mr, Dunstan said, he 
