206 OYSTIGNATHID AS. 
10. Hylodes griseus. 
Hyla grisea, Hallow. Proc. Ac. Philad. 1860, p. 485. 
Hylodes griseus, Cope, Proc. Ac. Philad. 1863, p. 48; Steindachn. 
Verh. zool.-bot. Ges. Wien, 1864, p. 245, pl. 17. f. 2. 
? Hylodes fenestratus, Stezndachn. 1. ec. pp. 249 & 552, pl. 16, f. 1. 
Iylodes, sp.?, Hensel, Arch. f. Natwrg. 1867, p. 161. 
Hylodes henselii, Peters, Mon. Berl. Ac. 1870, p. G48. 
Tongue oval, emarginate. Vomerine teeth in two short oblique 
series behind the choane. Snout rather elongate and rounded, 
longer than the orbital diameter; canthus rostralis strong; tym- 
panum one fourth the extent of orbit. Disks of fingers and toes 
moderate; a single metatarsal tubercle. The hind limb being 
carried forwards along the body, the tibio-tarsal articulation reaches 
the tip of the snout. Skin of belly smooth. A W-shaped spot on 
the occiput ; limbs cross-barred. 
Brazil. 
11. Hylodes bocourtii. 
Hylodes bocourti, Brocchi, Bull. Soc, Philom. (7) i. p. 150, and Miss. 
Sc. Mex., Batr. p. 50, pl. 16, f. 2. 3 
Tonguc subcireular, entire. Vomerine teeth in two small groups, 
close to the hinder edge of the choanze. Snout rounded, with rounded 
canthus rostralis; tympanum distinct, one third the diameter of the 
eye. First and second fingers of nearly equal length; toes with a 
rudiment of web; disks rather developed; a single metatarsat 
tubercle. Hind limb long. Skin smooth. <A black temporal spot ; 
two small black spots behind the scapule; arms marbled with 
black ; hind limbs marbled with brown; greenish white beneath. 
Coban, Guatemala. 
12. Hylodes augusti. 
THylodes augusti, (Dugés) Brocchi, Bull. Soc. Philom. (7) iii. p. 21, 
and Miss. Sc. Mex., Batr. p. 52, pl. 16. f. 1. 
Tongue subcireular, slightly nicked behind. Vomerine teeth in 
two small groups somewhat behind the choane. Snout short, 
rounded; nostril near the tip of the snout; tympanum distinct, 
smaller than the eye. First finger longer than second; tips of 
fingers and toes truncate ; (when at rest, this animal is said to bend 
its fingers and toes in the same way as a man bends his fingers in 
playing on the pianoforte, a position which I haye noticed also in 
Hvylodes leptopus;) two metatarsal tubercles. Skin minutely tuber- 
cular above, smooth beneath. Light yellow above, spotted with 
brown; limbs cross-barred. 
Guanajuato and Tupataro, Mexico. 
