Aviculoi'Ki ri x PONDBROSU8, Kth. fil. et Dun. (Monograph 

 on Carb. and Perrao-Carb. Invert., Vol. n, pt. 1 The 

 Palaeopectens, p. 10, pi. 5 ; pi. 12, f. 4). 



Loc. Barrier (D). 



Hor. Wandrawandian Series. 



Obs. One specimen was found, of a large, highly convex 

 valve, with imperfect auricles, which nevertheless are 

 separated distinctly from the valves. The costae are of 

 two orders, one secondary rib being placed between each 

 pair of primary ribs. This character does not, however* 

 appear to be constant enough to be relied upon, for in one 

 portion of the shell the secondary costae are quite absent. 

 In the original description, two secondary costae are 

 mentioned as being interspersed between each of the 

 primary. 



Aviculopecten Englehardti, Eth. fil. et Dun. (Mono- 

 graph on Carb. and Permo-Carb. Invert., Vol. n, pt. 

 1, The Palaeopectens, p. 17, pi. 9, f. 6-11; pi. 14, 

 f. 6-8). 



Loc. Burrier (D); Grassy Gully (P); Sugar Loaf (I and J); 

 Yalwal Creek (N). 



Hor. Wandrawandian Series. 



Obs. Mostly small internal casts were found, but at 

 Burrier several testiferous specimens were obtained. In 

 most cases the auricles were absent and broken, but one 

 specimen shows the interior of a valve with both auricles 

 well preserved. This shell has a fairly wide distribution 

 in the Shoalhaven district, but is always found in approxi- 

 mately the one horizon of the Wandrawandian Series ; and 

 is thus of considerable stratigraphical value. It is note- 

 worthy also, that in the Shoalhaven district this species is 

 uniformly smaller than the type. 



