172 THE ZOOLOGIST. 
tympanum two-thirds the diameter of the eye. Hind limb 
variable in length, the tibio-tarsal articulation reaching either 
the posterior border of the orbit, or half-way between the eye 
and the nostril, or between those points. Inner metatarsal 
tubercle extremely small, elliptical, not at all prominent; its 
length one-third or one-fourth that of the inner toe. Skin feebly 
warty; glandular lateral fold moderate)y prominent, narrower 
than the upper eyelid. Upper parts of a brighter or duller 
green, spotted with black; a lighter green vertebral line present 
in most cases; tympanum and glandular lateral fold bronzy ; 
flanks marbled with black. Limbs with more or less irregular 
black cross bars; no yellow on the hind side of the thighs. 
Lower surfaces white, spotted or marbled with blackish. 
Foot of Rana esculenta perezi. 
Dimensions. Male. Female. Female. 
From snout to vent ... -»- millim. 59 65 72 
Length of head <a ves ssn Gee 22 24 
Width of head A ah Maceo 24 oT 
From eye to end of snout ... = 9 10.5 11 
= nostril... ere - 4.5 5 6 
Diameter of the eye... ee is 7 7 7.5 
Interorbital space... see <= Q 2 2.5 
Diameter of the tympanum... ee & | 4.5 5 
Fore limb... a st x OD 36 37 
Hand a¥ ae ce Leg aol lt 15 16 
Hind limb ... ee abs ALP98 110 108 
Tibia... us Je ee uae 33 32 
Hooter. at ae: one pdt Pegs. 37 36 
First toe ua are ‘ee 53 8 9.5 9 
Inner metatarsal tubercle ... 6 2.5 2.5 2:5 
Found everywhere, up to an elevation of 1424 feet. 
In describing this new form, I have pleasure in associating 
with it the name of my esteemed friend Prof. Perez Arcas. 
