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BY W. W. STODDAKT, F.G.S., F.CS. 



Head February bth. 1875. 



THE discovery of this singular fish in Queensland, is one of 

 those curious occurrences with which the student of natural 

 history sometimes meets. 



For many years past the Rhsetic beds of Aust Cliff have been 

 celebrated for the great abundance of fossil teeth that have been 

 collected with the bones of Saurians. More than 400 different 

 forms of these teeth have been described under the name of 

 Ceratodas, or horned teeth, so called from several prominences 

 that proceed laterally from the body of the tooth (pi. 5, fig. 2). 

 Mr. E. T. Higgins, made the largest collection of these teeth, 

 which has been purchased for our magnificent Geological Muse am. 



As these were the only portion of the fish that had been found, 

 the original nature of the Ceratodus could not be ascertained with 

 certainty. For some time they were in the hands of Prof. Agassiz, 

 but without any elucidation. 



In 1870, the Hon. W. Forster shewed to M. Kreft, the Curator 

 of the Sydney Museum, a cartilaginous fish that lived in 

 Queensland, and whose teeth corresponded in every respect with 

 those of the fossil Ceratodus. 



They have been caught in the Mary, Dawson, and other rivers 



