4, CYCLORHAMPHUS.—5. CALYPTOCEPHALUS. 189 
4, CYCLORHAMPHUS. 
Cyclorhamphus, Tschudi, Bat. p. 81. 
Cyclorhamphus, sp., Dum. § Bibr. viii. p. 452. 
Pithecopsis, (Bibr.) Giinth. Cat. p. 22; Cope, Nat. Hist. Rev. 1865, 
p: 112, and Jowrn. Ac, Philad. (2) vi. 1866, p. 93. 
Pupil horizontal? Tongue oval, entire and free behind. Vome- 
rine teeth. Tympanum hidden. Fingers free; toes webbed, the 
tips not dilated. Outer metatarsals separated. Omosternum carti- 
laginous; sternum a cartilaginous plate. Terminal phalanges 
simple. 
Brazil. 
1. Cyclorhamphus fuliginosus. 
Pithecopsis fuliginosus, Giinth. Cat. p. 22. 
Cyclorhamphus fuliginosus, (Bibr.) Tschudi, Batr, p. 81; Dum. & 
Bibr, p. 454. 
Vomerine teeth in two oblique series behind the choanz. Toes 
two-thirds webbed ; a single small metatarsal tubercle. Skin quite 
smooth ; a large, flat, circular gland on each side. Uniform 
brownish ; beneath finely whitish-spotted. 
Brazil. 
5. CALYPTOCEPHALUS. 
Peltocephalus, Tschudi, Batr, p. 81. 
Calyptocephalus, (Bibr.) Dum. § Bibr, viii. p. 447; Giinth. Cat. p. 21; 
Cope, Nat. Mist. Rev. 1865, p. 112, and Journ, Ac. Philad. (2) vi. 
1866, p. 93. 
Pupil horizontal. Tongue circular, entire, free behind. Vomerine 
teeth. Cephalic derm involved in a rugose cranial ossification, the 
orbit being completely enclosed. Tympanum distinct. Fingers 
free; toes webbed, the tips not dilated. Outer metatarsals incom- 
pletely separated. Omosternum cartilaginous; sternum a carti- 
laginous plate. Terminal phalanges simple. 
Chili; Panama. 
1. Calyptocephalus gayi. 
Calyptocephalus gayi, Giinth. Cat. p. 21. 
Peltocephalus quoyii, T'schud?, Batr. p. 81. : 
Calyptocephalus gayi, Dum. § Bibr. p. 450; Guichen. in Gay, Chile, 
ix. p. 109, pl. 6; Stetndachn. Novara, Amph, p, 15; Espada, Viaj. 
Pacif., Vert. p. 2. 
Vomerine teeth in two nearly straight series between the choane. 
Head depressed ; snout very short, rounded ; eyes small, interorbital 
space much broader than the upper eyelid; tympanum nearly as 
large as the eye. First finger shorter than second; toes nearly 
entirely webbed; subarticular tubercles none; inner metatarsal 
tubercle oval, blunt; no outer tubercle. The hind limb being 
