PAPERS READ. 



ON ADDITIONAL EVIDENCE OF THE GENUS 

 ICHTHYOSAURUS IN THE MESOZOIC ROCKS 

 ("ROLLING DOWNS FORMATION") OF NORTH- 

 EASTERN AUSTRALIA. 



By R. Etheridge, Jun., 



Palaeontologist to the Australian Museum, and Geological 

 Survey of New South Wales. 



(Plate VII.) 



The only remains of Ichthyosaurus so far recorded from the 

 Mesozoic rocks of Australia, are those to which Prof, F. McCoy 

 a,pplied the name of /. Australia at the time of his first announce- 

 ment of the discovery of Enaliosaurian Reptiles in Northern 

 Queensland.* The fossils in question were obtained at the base 

 of Walker's Table Mountain at the head of Flinders River, and 

 consist of the hinder portion of the head, numerous vertebroe, a 

 paddle, &c., casts of which can be seen in the Australian Museum. 



The interesting fragment now brought under notice is the snout 

 or fore part of the skull of an Ichthyosaurus, and is, I believe, the 

 first of its kind yet discovered in Australia. 



It is from Marathon Station, and I am indebted to the kindness 

 of Mr. de Vis for an opportunity of describing it. I believe it 

 forms a part of the Palseontological Collection of the Queensland 

 Museum. 



The fossil consists of that part of the upper and lower jaws of 

 a large skull anterior to the nostrils. It measures ten inches in 

 length, and exhibits the greater portion of the right maxillary and 



Trans. R. Soc. Vict., 1868, VIII., p. 42. 



