3i8 



2. Plastron obtusely pointed anteriorly; a 

 yellow band from the nostril to above the 

 ear, passing on the upper eyelid, two others 



on the upper and lower jaw 3. ^. albertisi p. 319. 



II. The width of the bridge at least one third the 



length of the plastron; barbels present \. E. siibglobosa p. 319. 



B. Upper surface of neck with conical, erect tuber- 

 cles; barbels present, conical. 



1. Nuchal absent 5- -£'. branderhorsti p. 320. 



2. Nuchal present. 



a. Tail longer than the head 6. E. schultzei p. 321. 



b. Tail shorter than the head "j. E. novae-guineae p. 321. 



I, Emydura macquarri (Gray). 



Hydraspis viacquarrii^ Gray, Syn. Rept. 1831, p. 40. 



Emydura macquariae^ Boulenger, Cat. Chel. 1889, jj. 230 (s. syn.). 



Emydura macquarrii^ Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 583. 



Carapace a little depressed, usually with a distinct vertebral 

 groove, two times and a half to three times as long as high; 

 posterior margin expanded, not or slightly serrated. Nuchal 

 shield well developed ; the shields with longitudinal or vermi- 

 cular rugosities or impressions. Plastron rounded anteriorly, 

 notched posteriorly, more than three times as long as the width 

 of the bridge; intergular shield larger than gulars, not quite 

 twice so long as broad. Head with two small barbels; neck 

 above with round warts. Fore limbs with five, hind limbs with 

 four claws; digits entirely webbed. 



Carapace olive or olive-brown; plastron pale olive; soft parts 

 brownish; a yellow band from the angle of the mouth passing 

 below the ear to the neck. Length of shell 270 mm. 



Habitat: New Guinea (Fly river, Sepik river). — Australia: 

 Victoria river, Burnett river, Adelaide, lake George. 



2. Emydura kreffti (Gray). 



Chelymys krefftii^ Gray, Ann. Nat. Hist. (5) VIII 187 1, p. 366. 



Emydura krefftii^ Boulenger, Cat. Chel. 1889, p. 231. 



Etnydtira krcfftii^ Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 583. 



Carapace a little depressed, oval, two times and two fifths 

 to three times as long as high, posterior margin less expanded 

 than in the preceding species, not or a little serrated. Nuchal 



