148 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[June 1, 



In making use of the term " Cambro- Silurian," I did not mean 

 to designate any true Lower Silurian beds, but simply to express a 

 possibility of some of our oldest gold-bearing rocks being true 

 Cambrian or Hypozoic strata. I have, however, found Lower Silu- 

 rian fossils in the rocks of all the Gold-districts that I have carefully 

 examined; but in any beds lying west of the meridian of Mel- 

 bourne Lingulce and Graptolites only have been found. We find 

 Bohemian, British, and American species associated in both our 

 Upper and Lower Silurian beds. 



I have recently discovered, imbedded in our Pliocene water- worn 

 gravel near Melbourne, two specimens, considered by M'Coy to 

 belong to decidedly Chalk species. One is a very perfect Echino- 

 derm, the other a fragment of Coral. They are both quite silicified 

 and in about the same state of preservation. It will be very in- 

 teresting if we can prove the former existence in Yictoria of the 

 Chalk-formation. 



The only other interesting discovery of the Survey here is the 

 Bone-cave at Gisborne, about 25 miles north of Melbourne. En- 

 closed is a sketch of the locality, also a plan and section on true 

 scale from actual measured survey (see figs. 1, 2, &3). In it, imbedded 



Fig. 1. — Entrance of the Bone-cave in the Tertiary Basalt, in a Ravine 

 at the head of the Toolerrn Toolerrne Creek, five miles S. by E. from 

 Gisborne ; explored by G. D. H. Aplin, Assistant-Surveyor, 1857. 



in light powdery and perfectly dry soil, we found great quantities 

 of the osseous remains of Birds and Mammals ; the most remarkable 

 being perfect skulls of the Dingo, the Devil of Tasmania, and another 

 carnivorous animal, which M'Coy thinks is quite a new genus : the 

 skull is in shape somewhat similar to that of a domestic cat, but not 

 more than half the size ; and there are only two molars. The roof 



