tion plain, consisting of a few moderately deep growth 

 wrinkles. 



Dimensions.— Height £ of an inch; width vV of an inch 

 or I5- times the height. 



Loc. Barrier (D). 



Hor. Wandrawandian Series. 



Obs. This species therefore differs from the preceding in 

 the relative proportions of its height and width, in length 

 of hinge line, in its concave margin, and in the broad 

 expansion of its posterior portion. Three specimens were 

 obtained from Burrier, all of approximately the same 

 dimensions. 



Aphanaia gigantea, de Kon. (Pal. Fossils of N.S. Wales, 

 p. 240, pi. 21, f. G). 



Loc. Grassy Gully (F). 



Hor. Wandrawandian Series. 



Obs. One large internal cast was found, besides several 

 small casts which may belong to this species. The pris- 

 matic layer in this shell is very thick, which causes the 

 test to be very brittle; and this is probably the reason for its 

 rarity, for in several localities in the district fragments of 

 shells were found which evidently belonged to this species. 

 Maeonia elongata. Dana. (Amer. Journ. Science, 1847, 

 iv, p. 158). 



Loc. Junction of Yalwal Creek and Shoalhaven River (N); 

 Burrier (D). 



Hor. Wandrawandian Series. 



Obs. At the first locality rather indifferent internal casts 

 were fairly common, but at Burrier numerous fine testifer- 

 ous specimens were obtained. 



Maeonia carinata, Morris sp. (Strzelecki's N. S. Wales 

 and Van Dieman's Land, p. 273, pi. 11, f. 3 aud 4). 



