Ch/ENOMya Mitch elli, tie Kon. (Pal. Fossils of N. S. 

 Wales, p. 205, pi. 16, f. 3). 



Loe. Barrier (D). 



Hor. Wandrawandian Series. 



Obs. Several specimens were obtained. 

 Chjsnomya Etheridgei, de Ivon. (Pal. Fossils of N. S. 

 Wales, p. 206, pi. 16, f. 2 ; pi. 17, f. 3). 



Loc. Burrier (D). 



Hor. Wandrawandian Series. 



Obs. Only one typical specimen was found. 

 Oh^nomya Etheridgei, de Kon., var. 



Loc. Barrier (D). 



Hor. Wandrawandian Series. 



Obs. Four specimens were obtained, which approach 

 nearer to C. Etheridgei than to any other species ; but the 

 upturned posterior portion of the shell is absent and the 

 gape is more ventrally situated. 



Oh.-exomya UNDATUS, Dana. (Geol. Wilkes' Explor. Exped. 

 1849, p. 687, pi. 2, f. 11). 



Loc. Burrier (D). 



Hor. Wandrawandian Series. 



Obs. Very abundant, both testiferous and as internal 



Burriera, gen. no v. 



Generic Characters.— Test triangular and flat. Equi- 

 valveand inequilateral, but not markedly so, with a marked 

 anterior gape. Te-d fairly stout and gradually thickening 

 towards the anterior termination, whieh is sharp and 

 acuminate. Anterior margin abrupt and remarkably 

 truncate, the shell at first sight appearing as if broken. 

 Posterior margin rounded. Posterior adductor impression 



