291 



small or absent in the adult; first vertebral as broad in front 

 as behind, or a little broader; second to fourth vertebrals 

 almost equal in length, more broad than long in the young, 

 about as broad as long in the adult; third vertebral with a 

 concave postero-lateral border. Plastron large, angulated lat- 

 erally in the young, convex in the adult, truncate anteriorly, 

 notched posteriorly; the width of the bridge exceeds the length 

 of the posterior lobe; suture between the gulars about half 

 as long as that between the humerals; longest median suture 

 between the abdominals; inguinal large, axillary smaller. Head 

 small, covered with smooth skin, and small shields on its 

 posterior part; snout pointed; jaws with denticulated edge, 

 upper jaw feebly notched in the middle; mandibular symphysis 

 a little shorter than the diameter of the orbit. Limbs with trans- 

 verse enlarged scales; fore limbs with five, hind limbs with 

 four claws; digits entirely webbed. 



Brown above, with three broad black longitudinal bands ; 

 yellowish below; head sometimes (males only?) with a broad 

 red band from the tip of the snout to the crown; a black 

 supraciliary band. Young specimens with one to three 

 black spots on each vertebral and one on the posterior border 

 of each costal, sometimes forming a black band between the 

 centre and the border; some of the marginals also with round 

 black spots, on the suture between two shields. Length ot 

 shell 760 mm. 



Nom. in dig. Beluku (Borneo). 



Type-specimen examined in the Leyden Museum. 



Habitat: Borneo! (Sarawak, Kuching, Oya, Buntal, Baram 

 river!, Pontianak). — Malacca; Singapore; Penang; Philippines. 



A herbivorous species, aquatic. 



2. Orlitia Gray. 

 (Gray, Ann. Nat. Hist. (4) XI p. 156, 1873). 



Head covered with small shields posteriorly only; skull with 

 a bony temporal arch; alveolar surface of upper jaw broad, 

 with a strong median ridge ; choanae between the eyes. Neural 

 plates hexagonal, the short side in front. Plastron united to 

 the carapace by suture. Digits entirely webbed ; fore limbs 

 with five, hind limbs with four claws. Tail very short. 



Distribution. Borneo; Sumatra. 



A single species. 



