82 
Geology and Physical Geography; 
Only two species of fossil fauna have yet been discovered in 
the Victorian Mesozoic rocks, viz., Unio Dacombi (McCoy), 
found in the rocks of the Wannon, and Unio Murrayi (McCoy)’ 
discovered in a piece of sandstone from near Lontit Bay. Both 
of these are fresh-water molluscs. Fossil plant-impressions are 
very numerous, but only a few distinct species have yet been 
identified. These are figured and described in Decades No. I. 
and No. II. of Professor McCoy’s Prodromtis of Victorian 
Palaeontology, and are as follows : — Zamites {Podozamites) 
Barklyi (McCoy); Zamites {Podozamites) ellipticus (McCoy); 
Zamites longifolius (McCoy) ; Tmniopteris Daintreei (McCoy) \ 
and Pecopteris Australis Qlor.)—P. Scarburgensis (Bean MSS.)! 
These are all characteristically of Mesozoic aspect. The three 
Zamites and the Pecopteris are regarded as indicating the Oolitic 
period of the Mesozoic epoch as that to which the Victorian 
Carbonaceous rocks are most nearly referable. Pecopteris , asso- 
ciated with these in Victoria, has also been found in New South 
Wales and Tasmania associated with Glossopteris Browniana , 
common in the coal-bearing rocks of those* colonics but so far 
unknown in Victoria. 
This has been regarded by eminent authority as evidence in 
favour of the Mesozoic age of the New South Wales coal-measures ; 
but there is, nevertheless, very strong evidence in support of the 
belief that the Victorian carbonaceous rocks form a younger group 
of the Mesozoic series than do the coal-measures of New South 
Wales, even if the latter are Mesozoic. The Paleontological 
evidence so far shows that Pecopteris is found associated with 
both Glossopteris and Tamiopteris Daintreei, hut that the two last- 
named have never been found together, indicating that Glossopteris 
had become extinct before Tcenioptcris Daintreei came into exist- 
ence, but that Pecopteris outlived the former and flourished con- 
temporaneously with the latter. The late Sir R. Paintree, in his 
work on the Geology of Queensland, lays considerable stress on 
the non-association thereof Glossopteris and Tceniopteris Daintreei 
the former of which he considers to be indicative of the Palaeozoic" 
and the latter of the Mesozoic age of the rocks in which they are 
respectively found. 
It is very likely that of the numerous species of Mesozoic flora 
some may have disappeared early in the epoch, while others 
associated with them continued to flourish through its later periods. 
The knowledge of how very superficial has been the search made 
for fossils among the Mesozoic rocks of Victoria tends to guard 
against too hasty assumptions as to the relations of the Ganga- 
mopteris beds of Bacchus Marsh to those containing Tceniopteris , 
Pecopteris, &c. ? of the Wannon, Cape Otway, Western Port, and 
South Gippsland ; or the relation of the whole Victorian Mesozoic 
scries to the Carboniferous rocks of New South Wales. There 
is not a shadow of a doubt, however, but that the Mesozoic 
rocks of the Wannon and Cape Otway, Western Port, and South 
