59 



Relation to Similar or Contemporaneous Deposits. 



The irregular upheaval of the coast line at Table Cape must 

 have been local, and occasioned probably by the same forces 

 which erupted the recent lava. Mr. Allport also speaks of the 

 travertin, near Hobart Town, having been altered by recent in- 

 trusion in that neighbourhood. Admitting the eruptive forces 

 to be contemporaneous, which is extremely probable, we should 

 be able to classify these respective deposits as belonging to, or 

 rather contemporaneous with the Lower Zone of the Laun- 

 ceston Basin. The resemblance of the leaf impressions in 

 the tavertin, and the nature of the fossil shells at Table Cape, 

 tend to confirm this opinion. 



Among the Table Cape shells now in my possession I have 

 noted the following genera : — 



Bivalves Univalves 



Lima Murex 



Pecten Conus 



Ostrea Pleurotoma 



Pectunculus Typhis 



Cucullea Siliquaria 



Tellina Natica 



Astarte ? Turritella 



Corbula Trochus 



Crassatella Cerithium 



Trigonia Scalaria 



Terebratula Cyprsea 



Cardium ? Ancillaria 



Leda Voluta 



Nucula 



Dentalium, Sponges and Corallines, abundant. 

 In the stratigraphically arranged British fossils, by J. W. 

 Lowry, F.R.G.S., it is interesting to notice how closely the 

 British Eocene fossil shells resemble those of Table Cape ; 

 many species are exactly identical, e.g. Typhis, Nucula, 

 Leda, but yet, the proportion of extinct to living forms 

 will hardly warrant us, in calling the Table Cape Shells Eocene 

 unless in the homotaxial sense according to Mr. Huxley. 



In conclusion, I may sum up the various points in this com- 

 munication as follows : — 



1st. The association of the fossil pine trees with the 

 BanTcsia and other recent fossil woods, in the original matrix 

 at Corra Lynn, indicates that they belong to about the period 

 during which the Lower Zone beds were deposited, and con- 

 sequently of comparatively recent date. 



2nd. The relations of the lake system with other systems 



