168 The Philippine Journal of Science 1922 
of back; these tubercles connected with the anterior pair by a 
very dim fold; tibia with indistinct tubercles; skin of throat 
slightly corrugated; belly, breast, underside of forearm, and 
femur strongly granulate; fingers with widened disks, the two 
outer much larger; those of the two inner fingers small, and 
partially opposed to the other two; subarticular tubercles large, 
rounded, well defined; carpal tubercles ill defined; toes with 
pads slightly smaller than those on fingers, one-third to one- 
half webbed; subarticular tubercles moderately distinct; a wavy 
skin fold on outer side of fifth toe and part of foot; inner meta- 
tarsal tubercle distinct, large, flattened; outer, if present, very 
indistinct; the tibiotarsal articulation brought forward reaches 
just beyond tip of snout. 
Color in life-—Above yellow-brown with markings of darker 
brown; upper eyelid black; snout and upper part of loreal 
region dark brown; two light areas behind eyes; a large 
regular brown spot beginning on shoulders, forking in the middle 
of the back, is continued to groin; area between branches 
only slightly lighter than the branches; one broad brown bar 
across femur and tibia and another narrow outer one; lower 
part of tibia and inner part of foot pure white; posterior 
aspect of femur nearly white with slight marbling of brown; 
second tubercle behind eyes very dark; edge of upper jaw some- 
what lighter than lores, and a dim light cream spot below 
and somewhat behind eye; throat, breast, belly, underside of 
arm, fingers, foot, toes, and web between toes strongly powdered 
with cinnamon brown; two inner fingers immaculate. 
Measurements of the type and the cotype of Philautus williamsi sp. nov. 
No. 356, No. 857, 
. type. cotype. 
mm. mm. 
Baout to vents Sis ee A oo 21 22 
Length Of head. oct oe ee eS 9 9.6 
Width of tead,...0.5-2 0; 10 10 
Depth of head... cece a ee 4.5 5 
Forelimb .___.. Sk us Rise dee Pape Onis Gealy le 12.8 13.5 
Longest finger -........... 6.8 6.3 
Hind limb - 40 38 
Longest toe, to metatarsal tubercle_____ : 9.6 9.5 
Diameter of eye_........ Cake ON rer ee 4 4 
Length of snouts ii55.22oo in ceo sake ha 4 4 
Variation—There is considerable variation both in mark- 
ings and in the distribution of tubercles on the head and 
back of the four cotypes." The prominent black tubercle some 
