Zoology.] NATUEAL HISTOEY OF VICTOEIA. [Reptiles. 



with small polygonal shields constituting a very slight ground for 

 generic distinction. 



The eggs have a strong white calcareous shell, of a slightly 

 ovate form, very little wider at one end than the other, bluntly 

 rounded at each end ; about 1 in. 7 lines long and 1 in. 1 line in 

 greatest diameter ; another specimen is 1 in. 8 lines long and 

 1 in. 1 line in diameter, being a little longer and proportionately 

 narrower. 



Very common in the River Murray and its branches, the 

 Darling, Goulburn, &c, from which a great number of specimens 

 of various ages and sizes are in the Museum. It is not found in 

 the rivers flowing south into the sea on the Victorian coast. The 

 specimen figured is one of average size from the Goulburn. 



Although so common, no recognisable figure has been published 

 before. 



Explanation of Figures. 



Plate 82. — Side view, one-half natural size. 



Plate 83. — Fig. 1, ventral view, one-third natural size. Fig. la, same specimen, dorsal view. 

 Fig. 2, diagram of plates of carapace; 1 to 5, vertebral plates ; 10, nuchal plate ; 11, caudal 

 plates ; 12 to 22, marginal plates. Fig. 3, diagram of plates of plastron or sternum ; 1, gular 

 plates ; lc/, intergular ; 2, humeral ; 3, pectoral ; 4, ahdominal ; 5, femoral ; 6, anal plates. 



Fredeeick McCoy. 



L H] 



