224 C. F. LASEKOX. 



limestones on the Mnrrinnliidgee River and other districts. 

 are gradually yielding their mollusean fauna to the collector. 



The Shoalhaven specimens obtained on the earlier collect- 

 ing tours, were kindly examined by Mr. W. S. Dun, and the 

 majority of the determinations are his. Further material 

 has led to some slight modifications in nomenclature, but 

 the names must still for the most part be regarded as 

 provisional. 

 Lepidodendrox si\ 



Loc. Yalwal Creek (P). 



Obs. Fair impressions of the stems of a Lepidodendroid 

 plant are fairly common in this locality. 



MONTICULIPORA SP. 



Loc. Yalwal Creek. 



Obs. Several specimens were found in boulders in the 

 bed of Yalwal Creek. 



Spirifera disjlncta, Sow. (Trans. Geol. Soc. London, 

 v (2), 1810, pi. 53, f. 8 ; pi. 51, f. 12, 13). 



Loc. Shoalhaven River (K); Grassy Gully (G). 



Obs. Specimens at K were found in situ. At G they 

 were found in a quartzite boulder above the junction of 

 the Devonian, and the Upper Marine Series (see former 

 paper). 



Rhynchonella pleurodox, Phill. (Geol. Yorkshire, 1836, 

 II, p. 222, pi. 12, f. 25-30). 



Loc. Grassy Gully (G). 



Obs. Found with Sjurifcvn disjuncta in this locality (see 

 former paper, page 321). 



Loc. Yalwal Creek (P). 



Obs. This shell is exceedingly common in this locality, 

 whole masses of rock being made up of its remains, but in 



