2^9 



bb. Suture between gulars slightly longer tharl 

 that between humerals; symphysis of lower 

 jaw longer than diameter of the orbit ... 2. Orlitia p. 29 1. 

 2. Two median ridges in the upper jaw: choanae 



behind the eyes; fore limbs with four claws. . 3. Batagur p. 294. 

 b. Alveolar surface of upper jaw without median ridges. 



1. Choanae behind the eyes 4. Damonia p. 295. 



2. Choanae between the eyes 5. Bellia p. 296. 



II. Neural plates hexagonal, the short side behind. 



a. Plastron united by suture to the carapace, not 



movable; skin of head smooth, not divided. ... 6. Geoemyda p. 298. 



b. Plastron united by ligament to the carapace, movable 

 in the adult between the hyo- and hypo-plastron. 



1. Vertebral shields 5; skin of head undivided. . 7. Cycleniys p. 301. 



2. Vertebral shields 6 or more; skin of posterior 



part of head divided into small shields 8. A-otochelys p. 304. 



B. Head covered above with horny shields; digits without 



web; metacarpels short; claws thick and straight. . . 9. Tcstudo p. 305. 



I. Callagur Gray. 



(Gray, Suppl. Cat. Sh. Rept. i p. 53, 1870). 



Head covered with small irregular scales at the temporal 

 region and the occiput only. Skull with a bony temporal arch; 

 alveolar surfaces broad, of the upper jaw with a median ridge; 

 choanae between the eyes. Neural plates hexagonal, long, 

 short-sided in front; fourth vertebral not longer than third, 

 covering three neuralia. Plastron united to the carapace by 

 suture. Digits entirely webbed; fore limbs with five, hind 

 limbs with four claws. Tail very short. 



Distribution. Borneo; Malay Peninsula; Philippines. 



A single species. 



I. Callagur borneensis (Schleg. & Miill.). 



Emys borneoensis^ Schlegel & Miiller, in Temm. Verb. Nat. Nederl. Ind. 1844, p. 30. 



Clefnmys borneoensis^ Strauch, Chelon. Stud. 1862, p. 33. 



Batagur borneensis^ Hubrecht, Notes Leyden Mus. Ill 1 88 1, p. 47. 



Callagur picta^ Boulenger, Cat. Chelon. 1889, p. 60. 



Cletnmys borneoensis^ Lenz, Mitt. Geogr. Ges. Liibeck (2) V 1893, p. 93. 



Kachuga brookei^ Bartlett, Sarawak Gazette Febr. i 1895, p. 29. 



Kachuga dhongoka^ part., Siebenrock, Zool. Jahrb. Suppl. X 1909, p. 452. 



Callagur picta^ idem, p. 455. 



Carapace with a strong vertebral and an interrupted costal 

 Indo-australian reptiles I. 19 



