ON TWO FORMS OF RANA FROM N.W. SPAIN. 171 
the throat, leaving an unspotted median longitudinal zone, as 
seen in R. latastii; the belly is immaculate, except sometimes 
with a few brown spots on the sides near the breast. 
The skull differs slightly from that of R. temporaria, the 
frontal-parietal being slightly convex, and the upper part of the 
ethmoid acute anteriorly. 
The testicles are very large and abundantly pigmented, often 
entirely black. 
DIMENSIONS. Male. Female. Young. 
From snout to vent ... ... millim. 60 65 55 
Length of head (to occiput) el es 18 15 
Width of head (at angles of jaws) ,, 17 19 15 
From eye to end of snout ... 5 7 7 6 
= nostril ... nae ¥s 3 3 2.5 
Diameter of the eye pa . 6 6 4 
Interorbital space... ee Pe 3 3 2.5 
Diameter of the tympanum i 4 3.5 
From eye to tympanum... 2 2 1.5 
Fore limb... Boe nee » 936 38 31 
Hand ais Ss ves sy es 14 11 
Hind limb (from vent) “PE » LO1 105 89 
tabia)~.. ae tee sas AN aE 26 31 Q5 
Hoot... we S6c sme ,, OR 32 Q7 
First toe ade ves aD Ar 5 6 5 
Inner metatarsal tubercle... By 3 2.5 Q 
Rana temporaria parvipalmata inhabits the north-west of 
Spain, equally common from the level of the sea to an elevation 
of 1422 feet. Near Pontevedra, Tuy, and Ferrol, it occurs con- 
jointly with Rana iberica. 
2. RANA ESCULENTA PEREZI, subsp. nov.—The aquatic frog 
of North-western Spain and Portugal differs so considerably 
from the typical R. esculenta figured by Roésel, that it surely 
deserves to be regarded as a distinct race or subspecies; although 
nearer the Prussian race, R. esculenta fortis, and the Algerian 
R. esculenta latastii, I should not feel disposed to unite it with 
either. 
Head not much depressed, the snout rather short and very 
obtuse, the loreal regions not very oblique; nostril nearly 
equally distant from the eye and the tip of the snout; inter- 
orbital space barely half the diameter of the upper eyelid; 
