26 Dr. A. Gunther on new Species of Snakes 
Five upper labials, the third and fourth below the orbit; the 
first pair of lower labials touch each other behind the mentale, 
without forming a suture. No azygos shield between the chin- 
shields. -Ventrals 151; anal entire; subcaudals 16. Brownish 
above, with eight brown longitudinal lines—two along the me- 
dian line of the back (that is, one on each side of the vertebral 
series of scales), a broader one along the meeting edges of the 
fourth and fifth outer series of scales, one of the same width 
along the meeting edges of the second and third series, and, 
finally, one, very narrow, along the meeting edges of the two 
outermost series. A broad brown collar on the neck, edged 
with yellowish; tail with two large black transverse spots. 
Lower parts uniform yellowish. 
Eight inches long. Borneo. 
CALAMELAPS, gen. nov. 
Body cylindrical, rather slender; tail short in the female, of 
moderate length in the male. Two pairs of frontal shields ; 
rostral rounded, moderate; nasal single, its anterior portion 
pierced by the nostrils; loreal and anteorbital absent, the pos- 
terior frontal forming a broad suture with the third labial; 
postorbital minute or absent; the fifth labial forming a long 
suture with the occipital; six upper labials. Eye very small. 
Scales smooth, without apical groove, in seventeen rows; anal 
bifid ; subcaudals two-rowed. ‘The posterior maxillary ‘tooth 
elongate and grooved. 
The type of this genus is Calamaria unicolor (Ruhrdt.), from 
West Africa. 
Ablabes (Enicognathus) flaviceps. Pl. VI. fig. B. 
Habit rather slender; head depressed, with very short snout. 
Scales im seventeen rows. Loreal rather higher than long; one 
preocular, just reaching the upper surface of the head; two 
postoculars. The occipital extends downwards to the lower 
postocular ; temporals 2+2, the two anterior in contact with 
the lower postocular. Hight upper labials, the third, fourth, 
and fifth entering the orbit. Anterior chin-shields not longer, 
but rather broader than the posterior, and in contact with four 
lower labials. Ventrals 150; anal bifid; subecaudals 97. Maxil- 
lary teeth small, numerous, closely set. Upper parts brownish 
black, powdered with grey. A grey band commences on the 
neck, runs along each side of the back, where it is three scales 
broad, and disappears on the tail; anteriorly it is edged with 
black, in the middle accompanied with black spots along the 
edges ; posteriorly the black spots stand in regular intervals 
within the band. Head and anterior part of the nape dark 
