Batrachians from Tonkin. 187 
combination of characters, agreeing with the Bufonide in the 
absence of teeth, whilst in other respects it shows such remark- 
able points in common with Pelobatide, e. g. Leptobrachium 
and Megalophrys, that one must regard it as on the whole 
nearer to the latter than to the true toads: another instance 
of the over-estimation of dentition as a character by which 
to define families in the Batrachia. 
Ophryophryne microstoma. 
Head small; snout very short, obliquely truncate, pro- 
jecting considerably beyond the mouth; canthus rostralis 
distinct, loreal region vertical; interorbital space as broad as 
the upper eyelid; a horn-like dermal appendage on the super- 
ciliary edge; eye rather small, a little larger than the very dis- 
tinct tympanum. Limbsslender; fingersand toes with slightly 
swollen tips, without subarticular tubercles; first finger not 
extending quite as far as second ; palmar and plantar tubercles 
indistinct. The tibio-tarsal articulation reaches the shoulder 
or the tympanum. Skin with small warts; above with 
delicate symmetrical glandular lines, which form two V’s on 
the head and anterior part of the back and an H on the poste- 
rior part. Greyish, with darker symmetrical markings ; 
black spots on the sides of the body and limbs; a white wart 
on each side of the breast. 
Four specimens, the largest (a gravid female) measuring 
55 millim. from snout to vent. 
Rana nasica. 
Vomerine teeth in two short oblique series between the 
choane. Head a little longer than broad, strongly depressed, 
with pointed, very prominent snout; canthus rostralis sharp, 
loreal region deeply concave; nostril equally distant from 
the eye and the tip of the snout; interorbital space nearly 
as broad as the upper eyelid ; tympanum very distinct, 2 to 2 
diameter of eye. Fingers rather slender, first extending 
beyond second ; toes entirely webbed ; tips of fingers and toes 
dilated into well-developed disks; subarticular tubercles 
small but very prominent; a small oval inner and a very 
small round outer metatarsal tubercle. 'Tibio-tarsal articula- 
tion reaching the tip of the snout or a little beyond. Skin 
smooth, granulate on the pelvic region ; a narrow glandular 
dorso-lateral fold. Greyish olive or brown above, with or 
without blackish spots; canthus rostralis, temple, and outer 
edge of glandular lateral fold blackish ; upper lip from below 
