l^LATES AND EXPLANATIONS 
Plates I-XII and XVI were prepared direct from the specimens by 
Mr. A. E. Dyer, at the Government Printing Office, Sj^dney. Plates 
XIII, XIV, and XV were drawn by Mr. F. R. Leggatt. 
Unless otherwise stated to the contrary, the figures are all of the natural size. 
PLATE I. 
Aviculopecten Mitclielli, Eth.Jil. and Dun, 
Fig. 1. Left or most convex valve, testiferous in part, less the posterior auricle, and showing 
costic and concenti’ic frills. 
Fig. 2. Right or nearly Hat valve, showing similar characters and a costate anterior auricle. 
Fig. .*1. Another example of a left valve, partly testiferous, with portions of both auricles, &c. 
Aviculopecten squamuliferus, Morris, sp. 
Fig. 4. External impression of a right valve taken from a relief, exhibiting the numerous costa; 
and close imbricating concentric frills on the general body of the valve, and 
decussated auricles, the radiating costas being the stronger. 
Localities. 
Figs. 1-3 Road cutting, near Allandale Railway Station. 
Fig. 4. Farley. 
