1896.] BATRACHIANS FROM THE CAUCASUS 549 
The tibio-tarsal articulation reaches the end of the snout or 
beyond, and the length of the hind limb between the vent and the 
tibio-tarsal articulation exceeds the length of head and body; the 
tibia is a trifle shorter than the fore limb, and nearly equals the 
length of the foot. The web between the toes, during the breeding- - 
season, is developed to the same extent as in AR. temporaria: in the 
male it reaches to the base of the penultimate phalanx on the 
inner side of all the toes but the last, which is webbed to the very 
tip; whilst in the female the last two phalanges of the fourth toe 
are free on both sides, and the distal phalanx is free on the outer 
side on the three inner toes and on the inner side on the outer toe. 
The free border of the web is deeply notched in the female, nearly 
rectilinear in the male. In the male post nuptias the palmation is 
as in the female. The subarticular tubercles are feebly or 
moderately developed; the inner metatarsal tubercle is small, oval, 
soft, rather more developed than in &, temporaria and somewhat 
less than in &. agilis; its length is not quite half that of the 
inner toe; a small tubercle is present at the base of the fourth toe. 
As in R. temporaria, the skin of the back in the breeding male 
is swollen through the great development of the lymph-cells, 
whilst in the female pearl-like granules are scattered on the sides, 
on the pelvic region, and on the hind limbs. The glandular lateral 
folds are feebly prominent; the distance between them, on the 
scapular region, equals one fifth to one sixth the length from 
snout to vent. 
The specimens, which have been for some time in spirit, are 
pale brown above, with large dark spots on the back and sides, and 
regular cross-bars on the hind limbs; a dark canthal streak, a 
large temporal blotch and a dark streak along the upper lip; a 
more or less distinct light streak between the latter and the canthal 
streak. Lower parts white, with small dark spots on the throat. 
As noticed before, the male is provided with a pair of internal 
vocal sacs. 
3. Gis Q. 
millim. millim. wmillim. 
From snout to vent ...... 70 67 64 
Lengthof head .......... 20 20 18 
Width of head .......... 22 22 20 
Diameter of eye ........ 6°5 a 6 
Interorbital width ........ 35 35 35 
From eye to nostril ...... 5 4:5 + 
~ » end of snout.. 9 9 8 
PVE PANUDY lord e's ee e!r eee 3°5 4 3 
From eye to tympanum.... 2°5 2 2°5 
Hore Umnigy si he oe = < a eet 45 42 37 
Ebingvhimaby 3..; 2. -je eis 129 120 108 
PRIDE ests tie cus suckie sas ae e's 42 38 35 
OGG? Beteie' ao yetetehol s. a. Sicteue 2 41 39 35 
Finer toen m2 sepia. sie 3 85 8 Go 
Inner metatarsal tubercle . . 3°5 3°5 3 
