REPTILES AND AMPHIBIANS FROM LIBERIA 779 
region, smaller on head and limbs. Belly smooth, with a faintly outlined discoidal fold; lower side 
of limbs smooth. 
Coloration. — Above ashy gray, with five dark dorsal areas: the first on the nasal region, the 
second a band connecting the orbits, third a band across intertympanic region, fourth a fainter 
band across the back just posterior to the insertion of the fore limbs, fifth a curved marking across 
the sacral region. Fore and hind limbs mottled and irregularly cross-barred with dark gray on the 
light gray field. Below, all ventral surfaces immaculate white. 
Measurements. — Snout to vent, 28; length of head, 10; breadth of head, 11; diameter of 
orbit, 2.5; length of tibia, 13; length of foot, 20; length of fourth toe, 11 mm. 
We created the genus Pseudoxenopus chiefly on account of the absence of 
vomerine teeth in the type specimen alleni, this condition, however, is not al- 
together rare in juvenile examples of the genus Rana and we have arrived at the 
conclusion that the type is juvenile and not “probably adult” as we originally 
stated. 
On comparing this type of Rana alleni with a Rana occipitalis of the same 
length, i.e. 28 mm. snout to vent, from Faradje, Belgian Congo (A.M.N.H. 
10910) the following points of difference are clearly noticeable. 
The snout of allent is much shorter (4. 25 mm.) than that of occipitalis (5.5 
mm.), its outline is much rounder and less acuminate in consequence. 
The nostrils of allenit are much closer together (2 mm.) than in occipztalis 
(2.65 mm.), moreover they are not raised in the same way for they hardly break 
the contour of the head which in occipitalis has an angular appearance when 
viewed laterally. 
While there is no apparent tympanum in alleni that organ is large and con- 
spicuous in occipitalis with a diameter of 2.25 mm. 
While there is a strongly pronounced transverse dermal fold meeting the 
posterior borders of the eyes in alleni as in adult occipitalis, in very juvenile 
occipitalis there is only a broad smooth depression. 
Allent has much stouter thighs the transverse measurement being 7.5 mm., 
while that of occipitalis is only 5.5 mm. 
The dorsal derm of alleni presents a very different appearance to that of 
occipitalis, the subequal warts of the former give the back an almost granular 
appearance while the very unequal warts of occipitalis show a tendency to form 
series, almost ridges. 
The coloration is different, strikingly so at first glance though on close in- 
spection a definite resemblance is to be noted, the characteristic blotching of the 
upper lip in occipitalis is wanting in alleni though perhaps indicated. 
In series, the length of the hind limb and the relative length of the fingers 
of occipitalis include alleni within their range of variation. 
The above characters of the Faradje frog hold good for four specimens from 
Faradje, Garamba, and Stanleyville ranging in size from 24 to 31 mm., kindly 
lent by Dr. G. K. Noble, as also for the Liberian specimens brought back by 
Dr. Allen, that is to say they all consistently differ from alleni in these points. 
Phrynobatrachus francisci Boulenger 
1 ex. (M.C.Z. 11984) Suahkoko. 
