12 Chaptnan and Gabriel: 



0. — Holocene Mollusca from Lahe Pertohe. 



This deposit probably belongs to a later episode than the shell-. 

 l>eds underlying tuffs. The locality is S. of Warrnambool and quite 

 close to the coast-line. 



V eiier ujyis crenata, Lam. sp. 



Tellina deltoidalis. Lam. 



Spisula triyonella, Lam. sp. 



Soletellina hiradiata, Wood sp. 



SoleteUina donacioides. Reeve 



Monodonta (Austrocochlea ) co/istricta, Lam. sp. 



Ri sella melaiio stoma, Gmelin sp. 



Potamides australis, Q. and G. sp. 



Bitfium cerithium, Q. and G. sp. 



Nassa lahecula, Adams. 



Salifiafor fragilis. Lam,, sp. 

 These specimens were found by Mr. H. J. Hauschildt and 

 donated to the National Museum, March 18th, 1908. 



6. — General Bemarl-s on the Ar/e of the Old Duue-rock and 

 associated shell-heds. 



The dune-rock of Warrnambool, like that of Sorrento, owes its 

 origin mainly to the remains of shells, and is therefore almost 

 entirely calcareous. That both of these rocks are far from modern, 

 historically "speaking, is proved by the occurrence in the Sorrento 

 dune-rock of the remains of an extinct kangaroo, Palorchestes, repre- 

 sented by pelvis, scapiila, portions of ribs and a tooth, as recorded 

 1>Y Prof. J. W. Gregory ji^ whilst that at Warrnambool has yielded 

 the footpi'ints of a gigantic bird, probably Ge?>7/ornis, a contem- 

 porary of Diprotodon in South Australia. 



The Warrnambool dune-rock affords an added interest to geolo- 

 gists, in its relationship to what are probably the latest effusions of 

 volcanic ejectamenta in Victoria, for as we have seen, shell-beds, 

 insisting practically of existing species occur in this locality over- 

 lain by volcanic tuffs^ similar to those of Tower Hill. 



1 Proc. Roy. Soc. Victoria, vol. xiv. (n.s.), pt. i., 1901, pp. 139-144. Gregory concludes his 

 piper with these remarks :—" Accordingly the lower exposed part of the Sorrento dunes dates 

 back to the time of extinct kangaroos, the agre of which is described as late Pliocene or Lower 

 Pleistocene." 



2 Voloanio tuff as defined by Prof. Judd and quoted by Prof. J. W. Gregrory is stated to consist 

 of "the finely divided materials, which, owing: to the storms of rain which frequently accompany 

 volcanic eruptions," descend in the condition of mud, which flows evenly over the surface of the 

 growing cone and cotisolidates in beds of very regularly stratified tufa or tuff. 



