330 HYLIDA. 
Habit extremely stout. Head small; mouth very narrow; snout 
long, truncated, forming a flat circular disk in front ; nostrils ver- 
tical, nearly on a line with the front edge of the eyes; eyes 
very small. Limbs very short; fingers and toes depressed, latter 
nearly entirely webbed ; subarticular tubercles indistinct ; inner toe 
tubercle-like ; a very large oval, shovel-like metatarsal tubercle. 
Skin smooth above, granular on the sides and beneath and on the 
snout. Olive-brown or bluish grey above, with or without yellowish 
spots on the sides and on the middle of the back ; the latter some- 
times confluent into a vertebral line. (Male with two lateral vocal 
cavities, internal, and hidden behind the angle of the mouth. 
—Gthr.) 
Mexico. 
BiG Mexico. M. Sallé [C.]. 
b-c. 9 & yg. Mexico. 
d-e. Ye. Vera Cruz. M. Sallé [C.]. 
f-g. Ye. S. America. M. Sallé [C. ]. 
8. HYLIDA. 
Hylide, Pelodryadid, and Phyllomedusidx, Giinth. Cat. Batr. Sal. 
Hylidee, Cope, Nat. Hist. Rev. 1865, and Journ, Ac. Philad. (2) vi. 
1866, 
Hylidee and Phyllomedusidx, Mivart, Proc. Zool. Soc. 1869. 
Upper jaw toothed ; diapophyses of sacral vertebra dilated ; ter- 
minal phalanges claw-shaped, swollen at the base. 
The sternal apparatus is much the same in all the members of 
this family ; the omosternum and the sternum are always present 
and cartilaginous. 
The vertebra are proccelian and destitute of ribs. The coccyx is 
attached to two condyles. 
Most of the species have a fronto-parietal fontanelle; this is 
absent in the adult state in several species of Hyla and in Noto- 
trema; in a few species of the former genus, in Vyctimantis, and 
in Triprion the skin of the head is replaced by the rugose cranial 
ossification. 
Thoropa, Chorophilus, and Acris, in which the diapophyses of 
the sacral vertebra are slightly dilated, connect the Hylide with 
the Cystignathide. 
Synopsis of the Genera. 
Pupil horizontal; toes free, the tips very slightly dilated. 
1. Thoropa, p. 331. 
Pupil horizontal; toes nearly free, the tips very slightly dilated ; 
diapophyses of sacral vertebra very slightly dilated. 
2. Chorophilus, p. 332. 
