DAMONIA. 23 



inguinal shields present. Head rather large; snout very short, 

 not prominent; upper jaw not hooked. Digits webbed to the 

 claws ; frout of forearm and outer side of leg witli large band-like 

 scales. Shell dark brown or black, plastron usually with yellowish 

 variegations, or bands following the sutures of the shields, or with 

 a broad band along each side. Soft parts dark brown or black ; 

 some large yellow spots on the head, becoming indistinct in old 

 specimens. 



Length of shell 170 millim. 



Tenasseriu), Siam, Malay Peninsula, Sumatra, Borneo. 



Common in small freshwater streams and ponds in Penang and 

 Kedah. Peeds on frogs, shell-fish, and animal ofial. 



Genus DAMONIA. 

 Gray, P. Z. S. 1869, p. 193. 



Neural plates hexagonal, anterior lateral margins shortest. 

 Plastron united to the carapace by suture, with long axillary 

 and inguinal buttresses ; humero-pectoral suture crossing the 

 entoplastron. Skull with a bony temporal arch ; alveolar surfaces 

 very broad, without median ridge ; choance behind the level of 

 the eyes. Skin of hinder part of head only divided into small 

 shields. Digits webbed. Tail short. 



China, Japan, and India to Malay Peninsula and Archipelago. 



Aquatic and carnivorous. 



A single species in the Malay Peninsula. 



19. Damonia suhtrijuga. 



Hmys suhtrijuga, Sclileg. & Miill. iu Temminck, Verb. Nat. Nederl. 



Ird. p. 3u' (1844). 

 Emys macrocepliala, Giinth. Rept. Brit. lud. p. 31 (1864). 

 Damonia suhtrijvf/a, Bouleiig. Cat. Chelon. p. 94 (1889) ; S. Flower, 



P. Z.S. 1899, p. 610; Bouleiio-. Fascic. Malay., Zool. i, p. 142 



(190.3). 



Carapace depressed, tricarinate, the lateral keels not extending 

 to the fourth costal shields; posterior border not serrated; nuchal 

 moderate, broader behind ; vertebrals 2 to 4 a little broader than 

 long, much narrower than the costals. Plastron smaller than the 

 opening of the shell, flat in both sexes, angulate laterally, truncate 

 anteriorly, angularly notched posteriorly ; the Avidth of the bridge 

 nearly equals the length of the hind lobe ; the longest median 

 suture between the abdominal shields; axillary and inguinal shields 

 present. Head very large ; snout projecting ; upper jaw emar- 

 ginate mesially. Digits webbed to the claws. Shell brown above, 

 with a more or less distinct black spot on each shield, yellow 

 beneath, each plastral shield with a large black blotch. Soft parts 

 dark brown ; a yellow streak from the end of the snout to the 

 temple, following the canthus rostralis and the supraorbital edge ; 



