1872.] 



DR. J. E. GRAY ON THE GENUS CHELYMYS. 



507 



bution. There are several specimens in the British Museum brought 

 from the Victoria River by Capt. William Chambers and Mr. Gould, 

 and more lately several specimens in spirit from Burnett River on 

 the east coast of Queensland. It is remarkable that the specimens 

 received at the same time from the Victoria and Burnett rivers present 

 such variarion in form that one is induced to believe that they are 

 referable to two species. Having only one or two specimens of the 

 one from the Macquarie River, we have not the means of deciding 

 whether the same variations occur in that river. 



The specimens agree in having a lead-coloured head, with a broad 

 streak from the middle of the hinder part of the orbit to the upper 

 front margin of the tympanum, and a similar, rather broad, streak 

 from the angle of the mouth to the underside of the tympanum. 



Fig. 2. 



Chelymys victories, from Krefft's photograph. 



In general the gullet and throat below this line are white ; but in 

 some they are more or less varied with lead-colour. The thorax in 

 all the specimens is much more oblong and convex than in the spe- 

 cimens received from Segou, on the Macquarie River ; but they vary 



