9. ENGysTOMA.—10. mIcROHYLA. 163 
4. Engystoma ovale. 
Engystoma ovale, Giinth. Cat. p. 51. 
Rana ovalis, Schnetd. Hist. Amph. p. 13; Shaw, Zool. iii. p. 8. 
Bufo surinamensis, Daud, Rain. pl. 33. f. 2, and Rept. viii. p. 184. 
ovalis, Daud. Rain. p. 92, and Rept. viii. p. 187. 
Rana bufonia, Merr. Tent. p. 177. 
Engystoma ovale, Fitz. Neue Classif. Rept. p. 65; Dun. §& Bibr. 
P {é ; Steindachn. Verh. zool.-bot. Ges. Wien, 1864, p. 285, 
. 18. f. 4, 
Geehnchns bicolor, ( Valence.) Guérin, Icon. Rept. pl. 27. f. 2. 
Microps unicolor, Wagl. Syst. Amph. p. 200. 
Stenocephalus microps, Tschudi, Batr. p. 88. 
Snout pointed, projecting, about twice as long as the diameter of 
the eye. Fore limb short, longer than its distance from the tip of 
the snout ; fingers short, first shorter than second. The hind limb 
being carried forwards along the body, the tibio-tarsal articulation 
does not reach the shoulder; toes quite free, with blunt tips and 
distinct snbarticular tubercles; a very small inner metatarsal 
tubercle ; no outer tubercle. Skin perfectly smooth; a fold across 
the head, behind the eyes. Brown above; lower surfaces lighter, 
marbled with brown; a whitish streak along the hinder side of 
the thighs. Male with a subgular vocal sac, and the throat black. 
S. America, 
age Bogota. 
O55 Or America. 
e-d. 3 Q. t 
5. Engystoma microps. 
Engystoma microps, Giinth. Cat. p. 52. 
Engystoma microps, Dum. § Bibr. p. 744; Steindachn. Verh. zool.- 
bot. Ges. Wien, 1864, p. 285, pl. 15. f. 3. 
Snout very long, pointed, strongly projecting ; eyes very small, 
one fourth the length of the snout. Fore limb very short, as long 
as its distance from the tip of the snout; fingers very short, first 
shorter than second. Hind limb very stout; it being carried 
forwards along the body, the tibio-tarsal articulation reaches the 
shoulder ; toes quite free, the tips swollen into regular disks ; first 
toe very short; subarticular tubercles indistinct; a very small, 
scarcely distinct, inner metatarsal tubercle; no outer tubercle. 
Skin perfectly smooth. Dark brown above, more or less dotted with 
whitish ; light brown beneath, immaculate. : 
Brazil ; Guiana. 
a-d. 9. Demerara Falls. 
10. MICROHYLA. 
Microhyla, Tschudi, Batr. p. 71; Dum. § Bibr. viii. p. 615; Giinth. 
Cat. p. 121; Cope, Journ. Ac, Philad. (2) vi. 1867, p. ee 
M2 
