324 Proceedings of the Royal Society of Victoria. 



Stpophalosia clarkei, Etheridge, sp. 



Productus clarkei, Etheridge, 1872. Quart. Jouru. Geol. Soc, 

 vol. xxviii., p. 334, pi xvii., figs, 2, 'la, b ; pi. xviii., figs. 4, 4(?. 



Strophalosia clarkei (Eth.), Etheridge Jun., 1892. (In Eth. and 

 Jack). Geol. and Pal., Queensland, p. 258, pi. xiii., figs. 12-17 ; 

 pi. xiv., fig. 19. 



A dorsal and a ventral valve occur separately in the present 

 collection. Foord' records this shell from the Kimberley 

 District, Western Australia. 



Locality and Horizon. — Irwin River District, Western Aust- 

 ralia. Carbo-permian. [2163-4.]. 



Productus undatus, Defrance. 



Productus undatus, Defrance, 1826. Diet. Sci. Nat., vol. xliii., 

 p. 354. 



Foord, 1890. Geol. Mag., vol. vii., p. 152, pi. vii., fig. 6. 



This species has already been recorded from the Irwin River 

 District by Foord. We have two specimens which, although 

 internal moulds of the shell, show the bases of the spine-s, and 

 the undulating wrinkles of the shell itself. 



Locality and Horizon. — Irwin River District, Western Aus- 

 tralia. Carbo-permian. [1385-6]. 



Productus cora, d'Orbigny. 



Productus cora, d'Orbigny, 1842. V'oy. Amerique merid., 

 vol. iii., pts. 3 and 4, p. 55, pi. v., figs. 8-9. 



P. cora, d'Orb., Etheridge, Jun., 1892 (in Eth. and Jack). 

 Geol. and Pal, Queensland, p. 248; pi. xii., fig. 14; pi. xiii., 

 fig. 1 ; pi. xxxviii., fig. 11. 



The examples in the present series are chiefly contained in a 

 large block of limonitic sandstone. One of the valves measures 

 5 cm. in width, and a little over 4 cm. in length ; whilst another 

 imperfect specimen must have measured when complete between 

 € and 7 cm. in width. 



These specimens are denuded of spine.s, but traces of tliem are 

 seen in the surrounding matrix. Some of the valves show the 



1 Geol. Man., vol. vii., 1890, p. 103. 



