288 Proceedings of the Royal Physical Society. 



Professor J. D. Dana, in a very kind letter lately received,* 

 informs me that the specimens of his P. fragilis are supposed 

 to have been destroyed in the disastrous fire which toolv place 

 some years ago at the Smithsonian Institution, where the 

 "Expedition Collection" was deposited. Here, again, we 

 shall, in all probability, be for ever left in doubt as to the 

 correct identity of a species. 



To return to the Queensland shells once more — their iden- 

 tification with P. hracliythcerus is fully borne out by the 

 shortness of the hinge, tendency to expand towards the front, 

 concavity of the dorsal valve, geniculate or bowed character 

 of the ventral, and the exposure in one of the specimens of 

 the short septum. 



Log, and Horizon. — Stonelumpy Creek — Marine Series (No. 

 165) ; Havilah-Byerwin Eoad, one mile south of Eosella 

 Creek crossing, associated with Streytorhynclms crenistria var. 

 senilis, in a marine band in the Upper or Fresh- Water Series 

 of the Bowen Eiver coalfield (No. 193). 



Collector. — E. L. Jack, Esq. 



Genus Strophalosia — King, 1844. 



(Annals Nat. Hist., 1844, xiv. p. 313 ; Mon. Permian Foss. England, 

 1850, p. 93.) 



Ohs. — The presence of the genus Strophalosia in the Pala30- 

 zoic rocks of Australia has already been satisfactorily indi- 

 dicated by Professor L. G. de Koninck,f who has described S. 

 prodicctoides from the Devonian beds of Kempsey, New South 

 Wales. In a collection made by Mr A. C. Gregory on the 

 Mantua Downs in 1856, and submitted by the late Eev. W. 

 B. Clarke, F.E.S., to Professor M'Coy in 1861, the latter re- 

 cognised certain forms which he considered indicative of 

 Permian rocks, viz.: a shell resembling Productus horridus, 

 and another near Aulosteges or Strophalosia.l Lastly, my 

 father, although he considered the existence of a Permian 

 fauna in these regions required confirmation, § noticed the 



* Letter, dated *' New Haven," Feb. 17, 1879. 



+ Foss. Pal. Nouv-Galles du Sud., 1876, pt. 1, p. 83. 



t Trans. R. Soc. Vict., 1865, vi., p. 46. 



§ Quart. Jour. Geol. Soc, 1872, xxviii., p. 32. 



