i88 



Frontal distinct or broken up into small shields; nasal cleft 

 extending to the first upper labial, sometimes to the second; 

 loreal usually in contact with the three or four anterior labials 

 and with the internasal; eye bordered by four or six shields, 

 a supraocular, a praeocular, one or two post- and one, two 

 or three suboculars; nine or ten upper labials; four lower 

 labials in contact with the anterior chin-shields ; posterior chin- 

 shields smaller, between the anterior and the labials. Scales 

 strongly keeled, in 23 or 25 (27) rows; ventrals 122 160; 

 anal divided; subcaudals 49 72. 



Grey, olive or dark brown above, with black spots or trans- 

 verse bands, sometimes indistinct; a light lateral band; a black 



O.T.OUoea. 



Fig. 70. Cerberus rhynchops (Schn.) X l lz> Side view of head. 



streak on each side of the head, passing through the eye. 

 Lower surface whitish, spotted with black, or with black trans- 

 verse bands or almost entirely black. Length of head and 

 body 800 mm.; tail 180 mm. 



Nom. in dig. Sawa butah-he (Simalur). 



Habitat: Simalur!; Nias!; Pulu Nako!; Mentawei Islands 

 (Sipora, Siberut!); Engano; Sumatra (Sabang on Pulu Weh!, 

 Peudawa, Atjeh!, Labuan, Medan!, Tandjung Laut in Palem- 

 bang, Ringgat!, Padang); Siak!; Riou!; Banka!; Borneo (Bu- 

 langan river, Sandakan Bay, Labuan, Sibu, Kuching, Buntal, 

 Singkawang!, Pontianak river, Bandjermassin, Samarinda!); 

 Java(Batavia, Cheribon sea!, Semarang!); Bali; Lombok; Flores!; 



