EAST AFRICAN REPTILES AND AMPHIBIANS 105 



PHRYNOBATRACHUS KINANGOPENSIS Angel 



Phrynobatrachus kinangopensis Angel, 1924, Bull. Mus. Hist. Nat. Paris, p. 131. 

 (Mt. Kinangop, Aberdare Range, in Kenya Colony.) 1925, Reptiles et 

 Batraciens, in Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale 

 (1911-12), p. 48, pi. 3, fig. 4. 



50 (U.S.N.M. 41113-26, 43011-46) Mt. Kenya, K. C. (Sm. Afr. Exped.) 



1909. 

 48 (U.S.N.M. 41156-84, 41348-54, 42957-64, 43065-8) Mt. Kenya to 



Fort Hall, K. C. (Sm. Afr. Exped.) 1909. 

 73 (U.S.N.M. 41204-5, 41315-35, 41742-51, 41753-60, 41762-4, 41766- 



71, 41773-91, 42996-8, 43076-7) Wambugu, K. C. (Sm. Afr. 



Afr. Exped.) 1909. 

 23 (U.S.N.M. 41474-95, 41497) Mt. Kenya Trip, K. C. (Sm. Afr. 



Exped.) 1909. 

 71 (U.S.N.M. 43101-12, 43114, 43116-23, 43125-34, 43136-75) 



Kenya Colony. (Sm. Afr. Exped.) 1909. 



Relations. — Plirynobatrachus Jcinangopensis, while perfectly dis- 

 tinct, appears to be closely related to P. acridoides; in all probability 

 it is the mountain representative of the latter. It is a more slender 

 frog, though this readUy observable difference is apt to be masked in 

 the case of females distended with ova. The readiest method of 

 distinguishing them is by the length of the lower jaw in relation to 

 its width; in Jcinangopensis the length, measured from its apex to 

 one of the angles of the mouth, is equal to the distance in a straight 

 line between the two angles; in acridoides the length is not nearly 

 equal to the breadth. In acridoides the third and fifth toes are webbed 

 to the disks, while generally speaking in Jcinangopensis these two toes 

 have the last phalanx free of web; in occasional specimens, however, 

 the web may persist as a very narrow margin to the disks or almost 

 to the disks. The undersurface in Jcinangopensis is usually uniformly 

 creamy-white, while in acridoides the throat at least is almost always 

 finely speckled ; occasionally, however, there is some slight speckling on 

 the under parts of Jcinangopensis. The skin fold extending over the 

 tympanum and almost to the shoulder has below it a characteristic 

 brown streak in Jcinangopensis. 



Variation. — Even with so long a series before me I find little to 

 add to Monsieur Angel's detailed description of this frog. Actually, 

 the snout, as measured from the anterior border of the eye, is a trifle 

 longer than the orbital diameter. As in acridoides there is a good deal 

 of variation in the degree of expansion of the tips of both fingers and 

 toes, digital disks may be present or absent. A striking feature of 

 this species is the uniformity in leg length which, in every one of a 

 hundred specimens examined and including both sexes, has the tibio- 

 tarsal articulation marking the eye. The skin is not always smooth; 

 in some (No. 41121, for example) it is distinctly warty and glandular; 

 in others the presence of minute spines may be detected, almost 



