BY R. ETHERIDGE, JUN. 203 



BRACHIOPODA. 



Genus PRODUCT US, J. Sowerby. 



Productus brachyth^rus, G. B. Sowerhy. 



P. hrachythcerus, G. B. Sby., in Darwin's Geol. Obs. Vole. 

 Islands, 1844, p. 158 ; Morris, in Strzelecki's Phys. 

 Descrip. N. S. Wales, &c., 1845, p. 284, t. 14, f. 4° 

 {non. f. 4^). 



Ohs. — Both a ventral and dorsal valve are present which 

 appear to represent this protean shell. The dorsal valve is of 

 a much more quadrate shape than the ventral, and belonged to a 

 larger individual. It is covered by closely set spine bases, which 

 both on this and on the ventral valve forcibly remind one of 

 D'Orbigny's figure of this species in Dumont D'Urville's work.* 

 The ventral valve also has an unmistakable resemblance to the 

 forms figured by Dr. Waagen as Productus Ahichi and P. serialis.j- 

 This resemblance lies in the elongated tear-like spines distributed 

 over the surface and the median sulcus. I have seen a similar 

 variety from Queensland. 



. P. hrachythcBvus is widely distributed throughout the marine 

 beds of the Coal Measures of N. S. Wales, Queensland, and 

 Tasmania. 



PELECYPODA. 



Geuus AVICULOPECTEN, McCoy. 



AVICULOPECTEN TENUICOLLIS, Dctna^ Sp. 



Pecten tenuicoUis, Dana, in Wilkes U.S. Explor. Exped. Vol. X. 

 Geol. p. 705, Atlas, t. 9, f. 7. 



Aviculopecten tenuicoUis, Etheridge fil.. Cat. Australian Foss. 

 1878, p. 67. 



* Voy. au Pole Sud, &c. Geologie, Atlas, t. 9, f. 6 and 7. 

 + Pal. Indica (Salt Range Foss.), 1884, I. pt. 4, fasc. 4, t. 74, f. 1-7, f.8. 



