xlvi. ABSTRACT OF PROCEEDINGS. 
leaves from near Rylestone in this colony, proved them to contain 
no less than ten per cent. of myrticolorin, or about five per cent. 
of quercetin; one ton of dried leaves, therefore, gives two hundred 
and twenty-four pounds of myrticolorin, and this crystallised with 
seven per cent. of water over one hundred pounds of quercetin per 
ton. As quercitron bark probably does not contain more than 
three per cent. of quercetin or sixty-seven pounds per ton, the 
advantages are decidedly in favour of these Eucalyptus leaves, in 
the increased percentage of quercetin, in the ease with which the 
leaves may be ground, and the simplicity of extraction. The 
powdered leaves are boiled in water to remove the myrticolorin, 
and this crystallises out on cooling, and may be thus easily 
removed. Myrticolorin may be obtained in large quantities, as 
this particular species of Eucalypt extends over a large portion of 
New South Wales and Victoria. It is not to be supposed, how- 
ever, that this species is the only one containing myrticolorin in 
its leaves. 
5. “ A second supplement to a Census of the Fauna of the Older 
Tertiary of Australia,” by Professor Rate Tare, Hon. 
Memb.; with an appendix on ‘ Corals,” by JoHN DENNANT, 
F.G.S. 
Professor Tate begins his paper by giving references to the 
principal contributions to Australian Tertiary Paleontology which 
have appeared since the publication of his first supplement in the 
Journal of this Society for 1888. He notes a number of genera 
hitherto unrecorded ag being represented in Australia, notably 
Plesiotriton, represented by two species from the Eocene, viz.:— 
one from Aldinga, S.A., and the other from Cape Otway, Victoria. 
P. Dennanti (a new species) from the latter locality, is then 
described. Also Gaskoinia, represented by a new species ( bullee- 
formis ) from the Eocene of Muddy Creek. Prof. Tate also records 
a new species of Hemiconus (H. Cossmanni) from Muddy Creek. 
The genus Borsonia is represented by no less than four species, 
viz.: B. protensa, B. Otwayensis, B. polycesta, all from the Eocene, 
Cape Otway, and B. balteata, from the Eocene, Belmont, Victoria. 
