In 1883 I cxaniined at the British Museum (Natural Uistory Branch) 
some small bivalves i‘or\varclccl to me l)y i\Ir. C. S, Wilkinson, and ^Mve to 
them the M.S. name of Vuio iriaiiamattensis.^ These little shells were; 
obtained by Mr. David from ironstone hands in the Wianamatta Shales, where 
quarried for brick-making purposes at Waterloo and Surry Hills. 
Since this important discovery, an exploration of the Wianamatta 
Shales at Bowral has been made by Mr. B. Dunstan, and has resulted in the 
unearthing of at least three additional species of bivalve shells. 
Biually, if Ave add to the foregoing the interesting Univalve found at 
Biloela by Mr. J. II. Maiden, Curator of the Technological Museum, our list of 
the Invertebrate Uauna of this group of rocks is complete, so far as at present 
known. The affinities of Tremanotns Maidcni, Eth., jnr., have been fully 
pointed out already,! and the interest attached to the reappearance of an 
obscure Silurian genus dwelt on. 
* See Wilkinson, “ Notes on the Geology of New South Wales,” 2nd edition, 4to. (Sydney), 1887, p. 76. 
t “ Annual Keport of the Department of Mines of New South Wales for 1886 ” [1887], p. 174, plate N, 
figs. 1-3. 
