60 aiui.piiian and Pritchar<l : 



tebrae and other fish remains from the Barwonian and Kalim- 

 nan deposits, as well as several examples from the Pleistocene 

 of Victoi'ia. These are not iucluded, at present, as we 

 wish to obtain a more complete recent series for comparison. 

 The foUowini;' genera are now dealt with, all the species of 

 which appear to be new, namely, Myliobatis, Edaphodon. Ischyo- 

 dus, Labrodon, and Diodon. Of these, Myliobatis and Atopo- 

 mycterus (Diodon) have been previously recorded by Professor 

 Tate, but no species have been figured or described. 



In addition to the large amount of material available to us 

 in the National Museum collection and in the private collection 

 of one of us, we have made use of the collections of Messrs. G. 

 Sweet, F.G.S., J. R. Dixon, and F. P. Spry, and to these gentle- 

 men we now express our thanks for kindly favouring us with 

 the opportunity of dealing with their specimens. To Prof. 

 Baldwin , Spencer, C.M.G., F.K.S., we are indebted for handing 

 to us for description the example of I^chyodus from Table 

 Cape. 



II._1)ESCRIPTI0N OF SPECIES. 



Order Selaciih. 



Fami ly Alyliobatidae. 



Genus Myliobatis, Cuvier. 



Myliobatis moorabbinensis, sp. nov. (Plate V., Figs 1-3). 



Description. — Median palatal teeth about five times as wide 

 as long, with a rather narrow and depressed inspect, and a dis- 

 tinct marginal curvature. Palatal surface flat to slightly con- 

 vex. Denticles of the articulating surface strong, and number- 

 ing about ten in 10 mm. of length. 



Dimensions. — Width of palatal teeth, 'I'l to 23 mm. ; length, 

 5 to 6 mm. ; length of articulating surface, about 5 mm. 



Locality and Horizon. — Beaumaris, Port Phillip, Kalimnan. 

 (Pritchard Coll.). 



Observations. — The genus Myliobatis has previously been re- 

 corded by the late Prof. K. Tate in his "Census of the Austra- 



