1896. ] BATRACHIANS OF THE MALAY PENINSULA, 899 
length of the hind foot; while in ali the adult Singapore specimens 
examined the breadth across the gape is greater than the distance 
from angle of mouth to end of snout, and equal to or greater than 
the length of the hind foot, but in the young of the Singapore 
variety the gape is less than the hind foot. The interorbital 
space in the largest Penang specimen is equal to, in the six others 
less than, the upper eyelid, in some considerably less ; in the 
Singapore variety, in young specimens the interorbital space is 
slightly less than the upper eyelid, in fair-sized specimens equal 
to it, and in large specimens one half broader than the upper 
eyelid. Blanford mentions the Singapore frog as having a smaller 
eye; but if specimens of similar size of the two varieties are com- 
pared, it will be seen not to be noticeable. Tympanum distinct, 
slightly larger in the Singapore variety, but variable in size; it is 
also variable in shape, when not circular, in the Singapore variety 
it has its greater diameter in a vertical position, in the Penang 
variety in a horizontal direction. In the Singapore variety a 
streng, prominent fold (well-developed in even quite small 
specimens) runs from behind the eye horizontally to over the 
tympanum, and then turns down at an obtuse angle and runs 
straight to the shoulder; in the Penang variety this fold is much 
less prominent, and instead of forming an obtuse angle forms a 
curve above the tympanum ; however, this character cannot divide 
the two forms, as in the British Museum specimens will be found 
with every gradation from the angular to the curved fold. 
Fingers moderate, first much longer than the second; toes 
broadly webbed, in the Singapore variety the web is more deeply 
emarginate than in the Penang variety, the terminal two phalanges 
of the fourth toe have only a narrow fringe of web along their 
sides. The tarsal fold is very variable in size, and often wanting. 
The fingers and toes have slightly though distinctly swollen tips, 
and the subarticular tubercles of fingers and toes are well developed ; 
the inner metatarsal tubercle is elongate and blunt, there is no 
outer tubercle : in these characters there is no difference between 
the two varieties. The hind limb being carried forward along the 
body the tibio-tarsal articulation reaches beyond the eye, usually 
to the end of the snout: the Penang specimens have on the whole 
longer hind legs than those from Singapore when measured in this 
way. 
Skin smooth above. Hinder portion of upper eyelid tubercular. 
In young specimens there is a narrow glandular fold on each side 
of the back, and other, both round and longitudinal, glands 
scattered over the skin of the upper surfaces; these glands gradu- 
ally disappear with age, but seem more persistent in the Penang 
variety. Male without vocal sacs. 
Blanford distinguished the Singapore variety from Lana fusca 
(Blyth) by, 1st, a much broader head; 2nd, a smaller eye; 3rd, a 
larger tympanum; 4th, flatter muzzle; 5th, nostrils nearer together ; 
6th, web of the hind toes less developed. Although, as mentioned 
