TLATE Vlir. 
I )eltoj)ectt‘ii Fittoni, Jlorris, sp. 
Fii;. 1. Partially testiferous left valve. Careful inspection of this tiifiire will reveal the obtusely 
nuinded major costa* tra^'ersed by the linear costa*, which cover the whole f>f the 
\ah('. 
Fii^. '2. Internal cast of a left \ alvc, slightly distorted; th':* major costa* only are here* visible. 
Fig. d. Internal cast of a right valve, also slightly distorted. The resiliiini furrows are seen 
on the right half of the hinge plate, and in shadow is the impression of tin* 
chondrophore. 
..\.viculo])ecten squanudiferus, Morris, sp. 
Fig. 1. E.xternal impression of a right valve. It will l>e noticed that although tin* costa* are of 
the same ty[ie as thost* of Plate I, Fig. I, tliey are lu'i'e moi'e numerous. 
Localities. 
I'ig. 1 . I >apto. 
Fig. 2. Quarry on road, near Dagworth, 
Fig. .‘5. iMaitlind District. 
Fig. I. Huon lload, Tasmania. 
