liUO 



dorsal valve. The researches of Davidson : upon this ^cnns 

 have shown D. hastata, Sow. to be so variable, and his 

 illustrations show such a complete transition between 

 extreme types, that I hesitate to create a new species upon 

 one specimen, which is only au internal cast. The Shoal- 

 haven shell approaches nearest to fig. 11, plate 1, in the 

 work quoted, but is much farther removed from the typical 

 form than even this illustration. The differences are such 

 that if further material be obtained it may be necessary 

 to raise this Dielasma to specific rank. 

 Dielasma cymbaeformis, Morris. (Strzelecki's New 

 South Wales and Van Dieman's Land, p. 278, pi. 17, 

 figs. 4 and 5). 



Loc. Grassy Gully (F). 



Hor. Wandrawandian Series. 



Obs. Only one rather poor specimen was found. 

 Martiniopsls subradiata, Sowerby sp. (Darwin's Geol. 

 Obs. Vole. Islands, p. 158). 



Loc. Grassy Gully (P); Burrier (D). 



Hor. Wandrawandian Series. 



Obs. Common at Grassy Gully, both as testiferous 

 examples, and as internal casts. Rarer at Burrier. At the 

 latter locality an internal cast was found showiug well the 

 internal spiral processes. 



Martiniopsls oviFORMrs, McCoy sp. (Ann. Mag. Nat. 

 Hist, xx, 1817, p. 234, pi. 43, figs. 5, 6). 



Loc. (1) Shoalhaven River near Nowra (Q); (2) Shoal- 

 haven River (A). 



Obs. Internal caste fairly abundant at Q. One good 

 cast was found at A. 



