330 



arch very narrow, one third to one fourth the diameter of the 

 orbit; interorbital space as broad as or narrower than the nasal 

 fossa; mandibular symphysis with a strong longitudinal ridge. 

 Tail very short. Limbs with three claws. 



Olive-brown above; head and chin with yellow spots, largest 

 below the temple. Young specimens light-dotted above, some 

 large black spots or a black transverse band on the back. 

 Length of disk 720 mm. 



Nom. indig. Kuja (W. Java). 



Habitat: Sumatra (Labuan, Medan!, Gambir!, Bringin!, 

 Wampu river in Langkat, Batu Bahra, Padang Bedagei, Serdang, 

 Indragiri, Siboga, Gunung Sugei, Bangko river near Muara Labu, 

 Sumanik river!, Singkarah!, Kaju tanam!, Taluk!, Djambi!, 

 Padang!); Riou!; Java! (Buitenzorg, Djokjakarta, Ngawi); Borneo 

 (Pata river, Kuching, Bau, Limbang, Baram, Sebruang Valley, 

 Gunung Kalawat, Merabah, Selimbau!, Tandjong, Bandjer- 

 massin); Moluccas?. Malay Peninsula; Burma; Cochin China 



Lives in muddy rivers, ponds, swamps and estuaries; chiefly 

 carnivorous. 



4. Trionyx sinensis Wiegm. 



Trionyx (Aspidonectes_) sinensis, Wiegmann, Nov. Act. Ac. Leop. Carol. XVII 



1834, p. 189. 



Trionyx sinensis, Boulenger, Cat. Chel. 1889, p. 256 (s. syn.). 

 Trionyx cartilagineus var. ne-wtoni, Bethencourt Ferreira, J. Sc. Lisboa (2) 



V 1897, p. 114. 



Trionyx sinensis var. newtoni, idem, p. 151. 

 Trionyx sinensis, Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 601 (s. syn.). 



A single neural between the first pair of costals; eight pair 

 of costals; plates pitted and vermiculate. Young specimens 

 with longitudinal ridges of small tubercles on the dorsal skin. 

 Epiplastra separated; entoplastron broad, forming an obtuse 

 angle; callosities well developed, finely sculptured, hyo-hypo- 

 plastral, xiphiplastral and sometimes entoplastral. Head mode- 

 rate; snout longer than the diameter of the orbit; interorbital 

 space narrower than the nasal fossa; postorbital arch at least 

 half the diameter of the orbit; mandibular symphysis without 

 a ridge; no large tubercles on the neck. Tail very short. 

 Limbs with three claws. 



Olive above, uniform or dotted with light; below whitish; 

 often a few black spots on the back; head with small spots; 

 dark streaks radiating from the eye: a rostral, a temporal and 



