352. Mr. G. A. Boulenger on new Snakes. 
internasals slightly shorter than that between the przefrontals; 
frontal jonger than its distance from the end of the snout, as 
long as the parietals ; loreal slightly longer than deep; one 
pre- and two postoculars ; no suboculars; temporals 142 ; 
7 or 8 upper labials, fourth and fifth, or third (divided) and 
fourth entering the eye; anterior chin-shields longer than 
the posterior and in contact with four lower labials. Scales 
in 17 rows. Ventrals 173; anal entire; subcaudals 60. 
Pale purplish brown above, with interrupted or ill-defined 
black cross-bars and 15 regular cross-bars enclosing a dark 
brown spot on the back; an angular dark brown black-edged 
cross-band passing through the eyes, forming a triangle on 
the snout, extending from the posterior angle of the rostral 
shield to the anterior fourth of the frontal; a large, A-shaped, 
dark brown, black-edged marking from the frontal shield to 
the nape; belly yellowish, with square black spots. 
Total length 530 millim.; tail 105. 
A single male specimen from the Man-Son Mountains, 
Tonkin, 3000 to 4000 feet, collected by Hr. Fruhstorfer, 
Very closely allied to S. cyclurus, Cantor, but apparently 
outside the possible limits of variation of that species. 
PCCILOPHOLIS, gen. nov. 
Colubride aglyphodonte. Teeth small, subequal, about 
ten in each maxillary. Head small, not distinct from neck ; 
eye small, with round pupil; nostril pierced in a single 
nasal; no supranasals; prefrontal single, in contact with 
the rostral; no loreal; preocular in contact with the nasal. 
Body cylindrical; scales smooth, without apical pits, in 
15 rows; ventrals rounded. ‘Tail short; subcaudals in 
two rows. 
Pecilopholis cameronensis. 
Snout rounded. Rostral bent over the snout between the 
rather large nasals, forming a suture with the prefrontal, 
which is twice as broad as long; frontal a little longer 
than broad, a little longer than the prefrontal, two thirds 
the length of the parietals; one pree- and two postoculars ; 
an elongate anterior temporal; five upper labials, third 
bordering the eye; chin-shields small, the anterior a little 
shorter than the posterior and in contact with three lower 
labials. Scales in 15 rows. Ventrals 178; anal divided ; 
subcaudals 23.  Blackish olive above, the lateral scales 
whitish in the centre; upper lip and a triangular patch from 
