71 



or the tip of the snout, shorter than the parietals; loreal long; 

 one prae- and two postoculars; temporals 2 + 2 or 1+2; nine 

 upper labials, fifth and sixth entering the eye; five lower 

 labials in contact with the anterior chin-shields ; latter shorter 

 than the posterior. Scales in 13 rows; ventrals 185 — 193; anal 

 divided; subcaudals 114 — I2i. 



Olive above, with black-edged scales; an indistinct dark 

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

 upper lip yellow. Lower surface pale green, the posterior 

 ventrals and the subcaudals margined with black; head yellow 

 below. Length of head and body 805 mm.; tail 315 mm. 



Type-specimens examined in the British Museum. 



Habitat: Ternate!; Halmahera!; Batjan. 



13. Zaocys Cope. 

 (Cope, Proc. Ac. Philad. p. 563, i860). 



Head long, distinct from neck; eye large; pupil round. Maxil- 

 lary teeth 20 — ^^, increasing in size posteriorly; mandibular 

 teeth about equal. Body long, slightly compressed, covered 

 with smooth or keeled scales with pits, in 12, 14, 16 or 18 

 rows; ventrals rounded. Tail long; subcaudals in two rows. 



Distribution. S. E. Asia. 



Key to the Indo-Australian species. 



A. A single loreal 5 scales in 12 rows 1. Z. toniicri p. 71. 



B. Two or three loreals; scales in 16 or 18 rows. 



I. Scales smooth; subcaudals 160 — 179 2. Z. fuscus p, 72. 



II. Scales of two or four median rows keeled; subcaudals 



no — 118 3. Z- carinatus p. 73. 



I. Zaocys tornieri Werner. 



Zaocys tornieri^ Werner, Verh. Ges. Wien XLVI 1896, p. 15, Taf. i, fig. I. 



Rostral twice as broad as deep; internasals as long as the 

 praefrontals; frontal as long as its distance from the tip of the 

 snout, a little shorter than the parietals; loreal more long 

 than deep; no subocular; two postoculars; temporals i + i; 

 nine upper labials, fifth and sixth entering the eye. Scales in 

 12 rows, two middle rows strongly keeled as far as the base 

 of the tail; ventrals 146; anal divided; subcaudals 131. 



Brown above; sides of head yellowish. Lower surface greenish; 



