338 HYLIDE, 
1865, p. 110, and Journ. Ac. Philad. (2) vi. 1865, p. 86, & 1867, 
. 200. 
Pentatelnn, Burmeister, Erléuter. Faun. Bras, p. 97; Cope, Journ. 
Ac. Philad. (2) vi. 1867, p. 200. 
Hylomedusa, Burmeister, l. c. p. 102. 
Pelodryas, Giinth, Cat. p. 119; Cope, Nat. Hist. Rev. 1865, p. 109. 
Scytopis, Cope, Proc. Ac..Philad, 1862, p. 354; Nat. Hist. Rev. p. 109; 
and Journ. Ac. Philad. (2) vi. 1866, p. 85. 
Osteocephalus, (Fitzing.) Steindachn. Arch. per la Zool. ii. fase. tte 
p. 77; Cope, Nat. Hist. Rev. 1865, p. 110, and Journ, Ac. Philad. 
(2) vi. 1866, p. 85. 
Acrodytes, Cope, Nat. Hist. Rev. 1865, p. 109. 
Smilisca, Cope, Proc. Ac. Philad. 1865, p. 194. 
Dryomelictes, Cope, 1. ¢. 
Cinclidium, Cope, Journ. Ac. Philad, (2) vi. 1867, p. 200. 
Chirodryas, Keferst. Giétting. Nachr. 1867, p. 358. 
Cophomantis, Peters, Mon. Berl. Ac. 1870, p. 651. 
Cincloscopus, Cope, Proc. Amer. Philos. Soc. 1870, p. 554, 
Plectrohyla, Brocchi, Bull. Soe. Philom. (7) i. p. 92. 
Cauphias, Brocehi, lc. p. 129. 
Pupil horizontal. Tongue entire or slightly nicked, adherent 
or more or less free behind. Vomerine teeth. Tympanum distinct 
‘or hidden. Fingers free or more or less webbed; toes webbed, the 
tips dilated into larger or smaller disks. Outer metatarsals united 
or slightly separated. Omosternum cartilaginous ; sternum a carti- 
laginous plate. Diapophyses of sacral vertebra more or less dilated. 
Cosmopolitan, except the Aithiopian Region ; one species only in 
‘the Palearctic and two in the Indian. 
Synopsis of the Species. 
- J. American SPEcrEs. 
A. Derm of head not involved in cranial ossification. 
1. Choane large; vomerine teeth in two strong series, 
forming together a /\, a A, or awn. 
a. Fingers half webbed, or more. 
a. A projecting rudiment of pollex *. 
Outer fingers entirely webbed; skin granu- 
late above ; heel with a triangular dermal 
appendawe. ./.°)s.josetce sees ess ese eat 1. maxima, p. 349. 
Outer fingers half webbed; upper surfaces 
perfectly smooth. che eme car ce 5. faber, p. 351. 
* This rudiment, in form of a tubercle or an acute claw on the inner side of 
the first digit, is produeed by one or two phalanges which are perpendicular 
to the metacarpal of the pollex; in the majority of the species these phalanges 
are absent, or have the same direction as the metatarsals, and are therefore not 
distinguishable externally. 
