230 CHELYDID. 
B. The width of the bridge measures at least one third the 
length of the plastron. 
Barbels: present i-Mate < sre sence evereee 4. subglobosa, p. 232. 
Barpelsabsemtc rata cose cece tons 5. australis, p. 232. 
Il. Upper surface of neck with conical erect tubercles; barbels 
well developed, conical. 
Nuchal usually absent; intergular shield 
larger than the gulars ........ a+.. 6. latisternum, p. 233. 
Nuchal present ; intergular very narrow, 
smaller than the gulars............ 7. nove-guinee, p. 233. 
ee aN 
ees 
Shell of Emydura macquarie. 
1. Emydura macquarie. 
Hydraspis macquarrii, Gray, Syn. Rept. p. 40 (1831). 
Platemys macquaria, Dum. § Bibr. ii. p. 438 (1835). 
Hydraspis victoria, Gray, Zool. Misc. p. 55 (1842). 
Chelymys macquaria, part., Gray, Cat. Tort. p. 42 (1844), and Sh. 
Rept. i. p. 57 (1855). 
