Miscellanea. 
79 
recent littoral species which have been cemented together by the 
percolation of water holding carbonate of lime in solution, which 
is continually trickling down the basaltic cliffs from the stratum 
of fossiliferous limestone which overlies and has been uplifted by 
the trap. The shells, gravel, and boulders on the beach have, 
with the lime, formed what is now solid rock ; the existing shells 
being apparently of the same species, or, at any rate, generically 
the same as the fossil ones.” 
Specimens in illustration of Dr. Hobson’s letter were exhibited. 
Dr. W. R Pugh exhibited a calculus taken from an ox killed 
by Mr. Williatt at Evandale, which had been fed at the Nile 
rivulet. The calculus had a most powerful odour of musk. 
“ The Analysis of the Gum of Xanthorrhcea,” as stated in pro¬ 
ceedings of the Chemical Society, was read, and specimens were 
produced. 
August 12, 1846, 
Mr. Ronald C. Gunn read a paper “On the Flora of Lord 
Auckland’s and Campbell’s Islands, founded upon Dr. Hooker’s 
Flora Antarctica and drew attention to the various genera and 
natural orders found in these islands and in Tasmania. 
Mr. James Grant produced the section of a Blue Gum tree 
(Eucalyptus globulus,) 16 years old, which was 4 feet in circum¬ 
ference at the ground, 3J feet at 9 feet up, and the whole height 
of the tree was 47 feet. Its size was nothing unusual for its age. 
The annual rings indicating its growth were plainly perceptible. 
Mr. Gunn drew attention to the probable value of this very 
fast-growing indigenous tree, which far exceeded all exotic trees 
with reference to its growth for timber purposes. It flourishes in 
any soil, and the timber is very good. It would answer admirably 
for purposes of shelter in exposed situations, &c. 
Lieut. M. C. Friend, R.N., exhibited specimens of Apus pro¬ 
duces, Latr. (Monoculus Apus, Linn.,) or a closely-allied species, 
found in pools of water at George Town. It also occurs in pools 
near Launceston. 
August 31, 1846. 
J. R. Kenworthy, Esq., exhibited five very distinct varieties of 
Carbonate of Iron found in the island. One occurs in nodules in 
an amygdaloidal trap rock at Campbell Town, and possesses much 
beauty. A somewhat similar form is found in trap rock, at Cam- 
bock, Evandale. A third variety is found in the centre of nodules 
of clay ironstone, and is very pure. Another variety was from 
the bottom of a well 60 to 70 feet deep at Trafalgar, near Laun¬ 
ceston. 
