329 



with a longitudinal ridge. Tail very short. Limbs with three claws. 



Brown above; white below; head spotted or vermiculated 

 above with black. Length of disk 500 mm. 



Habitat: Sumatra (Deli, Muara Bukit Tinggi); Java (Buitcn- 

 zorg!); Borneo (Akar river, Tandjong). — Malay Peninsula; 

 Penang?; Tenasserim; Pegu; Burma. 



3. Trionyx cartilagineus (Bodd.). 



Tesiudo cartllaginea, Boddaert, Epistola ad W. Rocll, 1770. 

 Trionyx cartilagineus^ Boulenger, Cat. Chel. 1889, p. 253 (s. syn.). 

 Trionyx cartilagineus^ Siebenrock, Zool. Jahib. Suppl. X 1909, p. 599. 

 Trionyx cartilagineus^ Annandale, Rec. Ind. Mus. VII part II 1912, \^. 168. 

 Ainyda cartilaginea^ Barbour, Mem, Mus. Comp. Zool. Harv. Coll. XLIV 191 2, 

 p. 144. 



Disk as long as broad or a little more long than broad ; a single 

 neural between the first pair of costals; eight pair of costals, 

 last forming a suture; plates coarse. Young specimens with longi- 



Fig. 127. Trionyx cartilagineus (Bodd.). 



tudinal ridges of small tubercles on the dorsal skin. Epiplastra 

 in contact or narrowly separated; entoplastron forming an 

 obtuse or a straight angle ; callosities well developed, coarsely 

 sculptured, hyo-hypoplastral and xiphiplastral. Head moderate; 

 snout much longer than the diameter of the orbit; postorbital 



