154 ENGYSTOMATID.Z&, 
lower surfaces immaculate or marbled with brown on the throat and 
under the limbs. Male with an internal subgular vocal sac. 
K.S. America. 
a-c. Her. Demerara Falls. 
d-q. dQ. Interior of Brazil. 
8. Phryniscus pulcher. (Pxrare XIII. fig. 2.) 
Habit slender. Head a little longer than broad, its length con- 
tained about twice and a half in females, twice and one third in 
males, in the length of the trunk; canthug rostralis angular; sides 
of head vertical; snout subacuminate, truncate, projecting ; nostril 
much nearer the tip of the snout than the eye; the diameter of the 
latter equals its distance from the nostril; interorbital space broader 
than the upper eyelid. Fore limb slender, a little longer than the 
trunk; fingers moderate, first very short, rudimentary; no meta- 
carpal nor subarticular tubercles. Hind limb rather slender, the 
tibio-tarsal articulation marking the posterior corner of the eye; toes 
short, first quite indistinct, one-third webbed; no metatarsal nor 
subarticular tubercles. Skin quite smooth. Blackish brown above, 
with light green markings, viz. a broad curved streak on each side 
of the back, a few round spots on the head and back, and stripes 
across the limbs; lower surfaces carmine, more or less spotted with 
black. Male with an internal subgular vocal sac. 
This species resembles very much A, flavescens in general struc- 
ture, but the head is narrower and the snout shorter. From snout 
to vent 35 millims. 
K. Peru. 
a-e. dQ. Chyavetas, 
9, Phryniscus cruciger. 
Phryniscus cruciger, Giinth. Cat. pp. 44, 136, pl. iii. fig. B. 
Phrynidium crucigerum, Jartens, Nomencl. Mus. Berol. p. 40. 
cee pechy derma Schmidt, Denkschr. Ac. Wien, 1858, p. 256, 
t. 3. f. 26. 
? Atelopus planispina, Espada, Viaj. Pacif., Vert. p. 148. f 
Habit slender. Head longer than broad, its length contained 
three times in females, twice and a half in males, in the length of 
the trunk; snout prominent, truncate, longer than the diameter of 
the eyeball; nostril nearer the tip of the snout than the eye; inter- 
orbital space broader than the upper eyelid. Fore limb slender, 
longer than the trunk; fingers webbed at the base, with swollen 
tips; first finger very short; an indistinct metacarpal tubercle ; 
subarticular tubercles none. Hind limb rather elongate, the tibio- 
tarsal articulation marking the eye; toes half webbed, inner very 
short but perfectly distinct ; tips of toes swollen ; metatarsal tubercles 
indistinct ; subarticular tubercles very indistinct. Upper surfaces 
with flat warts. Olive above, punctulated with black, and with 
