230 



CHELYDIDiE. 



B. The width of the bridge measures at least one third the 

 length of the jjlastrou. 



Barbels present 4. suhglohosa, p. 232. 



Barbels absent 5. australis, p. 232, 



II. Upper surface of neck with conical erect tubercles ; barbels 

 weU developed, conical. 



Nuchal usually absent ; intergular shield 



larger than the giilars G. latisternum, p. 233. 



Nuchal present ; intergular very narrow, 



smaller than the gulars 7. novce-guinece, p. 233. 



Fig. 63. 



Shell of Emydura macquaria. 



1. Emydura macquarise. 



Hydraspis macquarrii, Gray, Syn. liept. p. 40 (1831). 

 Platemys macquaria, Dion. ^- Bibr. ii. p. 438 (1835). 

 Hydraspis victoria), Gray, Zonl. Misc. p. 55 (1842). 

 Chelvmvs macquaria, part., Gray, Cat. Tort. p. 42 (1844), and S/i. 

 Rept. i. p. 57 (1855). 



