1896.] BATKACfitANS JBOM *HB OAFOASUS. SBl 



d. 

 millim. 



From eye to end of snout; 6'5 



Tympanum 2-5 



From eve to tympanum . 2 



Fore limb 12 



Hind limb 74 



Tibia 24 



Foot 24 



Inner toe 5 



Inner metatarsal tubercle 2 



PBLODyTHS OAUCASious. (Plate XXI. fig. 2.) 



Pelodytes caucasicus, Bouleng. Ann. & Mag. N. H. (6) xvii. 

 May Ist, 1896, p. 406. 



Vomerine teeth in two slightly oblique transverse groups between 

 the choanse. Head slightly . broader than long ; snout subacumi- 

 nate, as long as the diameter of the orbit, with moderately distinct 

 canthus ; tympanum feebly distinct, two thirds the diameter of the 

 eye. First finger as long as second ; toes webbed at the base and 

 fringed ; subarticular tubercles strong ; a very small inner meta- 

 tarsal tubercle. The tibio-tarsal articulation reaches the tip of 

 the snout. Body covered with strong warts, some of which are 

 confluent into longitudinal folds ; a parotoid-like fold above the 

 tympanum. Olive above, white beneath, all the warts covered with 

 a blaclc horny layer in tlie male. Male with an internal vocal sac ; 

 the fore limbs very strong, with rugose black plates as in P. punc- 

 tatus ; similarly with black rugosities round the lower jaw, on the 

 breast, belly, and under the limbs, especially on the subarticular 

 tubercles. 



This species, described from a single male specimen froui 

 Mt. Lomis, 7000 ft., received from Dr. Radde, is very closely 

 related to the Pelodytes pmictatus of Western Europe, agreeing in 

 the extraordinary development and distribution of the nuptial 

 horny excrescences on the ventral surfaces in the males, to which 

 attention was drawn by me in 1881 (Bull. Soc. Zool. France, 

 1881, p. 73, fig.). Here, however, the excrescences extend also to 

 the warts and ridges of the upper surfaces, so that P. punctatus 

 must be regarded as the Batrachian in which these temporary 

 attributes of the males reach their highest development. 



P. caucasicus is distinguished from its congener in the longer 

 hind limbs and the slightly different disposition of the vprnerLne 



