40 



Head depressed, snout rounded ; nostril between two nasals; 

 frontal as long as its distance from the rostral; praeocular large; 

 two postoculars, upper one largest; a small supraocular, smaller 



Fig. 20. Xenopcllis unicolor Reinw. X '/2- ^^pper view of head. 



than the upper postocular; a large, azygous interparietal, in 

 the middle of four parietals; eight upper labials, first in contact 

 with the internasal, fourth and fifth entering the eye; a pair 



of small chin-shields, in contact with the three 



anterior lower labials. Scales in 15 rows, smooth; 



ventrals 164 — 193; anal divided; subcaudals 



26—31. 



Brown or blackish above, iridescent, the scales 



light-edged ; upper lip pale yellow. Lower surface 



white. In young specimens the head is whitish 



and a yellow collar is present. Length of head and 



body 900 mm.; tail 100 mm. 



Nom. indig. Ular ekor merak; Soratu (Sima- 



lur); Ulen tana (C. Celebes). 



Habitat: Simalur!; Nias!; Sumatra (Pulu 

 young specimen. Weh!, Atjeh, Medan !, Labuan, Langkat, Indra- 

 X 21/2- giri. Singkarah !, Rau, Gunung Sahilan !, Agam, 



Ringgat!, Padang !, Palembang!); Siak !; Riou !; 

 Banka!; Java (Gadok, Buitenzorg!, Preanger, Salatiga!, Tengger 

 Mts. 1200 M.) ; Borneo! (Kuching, Singkawang, Kapuas river, 

 Kutei, Bulangan river, Balikpapan, Bandjermassin); Celebes 



Fig. 21. Xcno- 



peltis unicolor 



Reinw. Head of 



