16, 3 
Taylor: Philippine Amphibia 
277 
Staurois natator (Gunther). Plate 4, figs. 2 and 2a. 
Ixalus natator Gunther, Cat. Batr. Sal. Brit. Mus. (1858) 15, pi. 
4, fig’. C; Proc. Zool. Soc. London (1879) 79. 
Staurois natator Cope, Nat. Hist. Rev. (1865) 117. 
Rana natatrix Boulenger, Cat. Batr. Sal. Brit. Mus. ed. 2 (1882) 
71; Boettger, Ber. Senck. Nat. Ges. (1886) 121. 
Staurois natator Boulenger, Ann. & Mag. Nat. Hist. VI 14 (1894) 87. 
Ixalus nubilus Mocquard, Nouv. Arch. Mus. 2® (1890) 153, pi. 11, 
fig. 3. 
Description of species. — (From No. 1601, *E. H. Taylor col- 
lection; collected at Bunawan, Agusan, Mindanao, P. L, August 
12, 1912, by E. H. Taylor.) Vomerine teeth wanting; tongue 
elongate, oval, deeply notched behind; choanse large; canthus 
rostralis angular, curving in between eye and nostril; ioreal 
region vertical for some distance, then sloping out, with the 
lip nearly vertical ; snout narrower behind nostrils than directly 
in front; tip of snout vertical, rounding in outline; eye vei’y 
large, equal or nearly equal to length of snout ; tympanum small, 
circular, its diameter from one-third to two-fifths eye ; separated 
from eye by a distance less than half its diameter; interorbital 
region narrow, a little less than width of upper eyelid; distance 
of nostrils from each other less than their distance from eye; 
nostril half as far from eye as from end of snout ; skin strongly 
granular above on Ioreal region, above eyelids, and back of body ; 
upper surface of limbs smooth; chin and breast smooth; belly 
and sides vdth larger granules ; anal region and part of underside 
of thighs granular; no distinct supratemporal fold; no tarsal 
fold ; fingers large, with wide, roughly triangular disks, diameter 
of disk larger than tympanum ; first finger shorter than second, 
second shorter than fourth, fourth not reaching base of disk 
of third; fingers unwebbed; toes completely webbed, the mem- 
branes reaching base of disks ; disks on toes more rounding and 
a little smaller than disks on third and fourth fingers; disks 
with distinct grooves on edges and with a transverse depression 
above; fifth toe extending slightly farther than third, fourth 
longest; a small inner m.etatarsal tubercle and a still smaller 
outer tubercle; subarticular tubercles small, not very clearly de- 
fined; the tibiotarsal articulation reaches much beyond snout. 
Male with internal vocal sacs. 
Color in life. — Above olive to bronzy green, mottled with 
darker; legs lighter, barred with the ground color of back; lips, 
chin, belly, and sides light blue-green, v/hich color penetrates 
body; tongue, inside of mouth, body cavity, and intestines light 
blue-green ; interdigital membrane of toes dusky. 
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