THE BATRACHIA OF NORTH AMERICA. 349 



The specimens of this species are for the present inaccessible to me. 

 I therefore have given above a MS. description of Professor Baird's. 



HYLA — Laurenti. 



Specimen Synopsis Reptilium, 1768, p. 32; Dum. & Bibr., p. 542; Glinth., 

 Cat., p. 98; Cope, Nat. Hist. Rev., 1865, p. 110, and Journ. Ac. 

 Pliila. (2), VI, 1866, p. 86, and 1867, p. 200 ; Boulenger, Cat. Batr. 

 Sal. Brit. Mus., 1882, 2d ed., p. 337. 



Calamites Fitziug., N. Class. Reptil., p. 38 ; Wagl., Syst. Amph.p.200 ; Tschudi, Class. 



Batr., p. 72 ; Cope, Journ. Ac. Phila. (2), vi, 1867, p. 200. 

 Auletris Wagl., I. c, p. 201. 

 Eyas Wagl., I. c, p. 201. 

 Scynax Wagl., I. c, p. 201. 

 Sphcenorliynchus Tschudi, I. c, p. 71. 

 Lophojms Tschudi, I. c, p. 73. 

 Dendroliym Tschudi, I. c, p. 74. 



Banoidea Tschudi, I. c, p. 76; Cope, Journ. Ac. Phila. (2), vi, 1866, p. 85. 

 Litoria Tschudi, I. c, p. 77 ; Dum. & Bibr., p. 503 ; Glinth, Cat., p. 96. 

 Bylomedusa Burraeister, Erlauter. Faun. Bras., p. 102. 

 Cliirodryas Keferst., Giitting. Nachr., 1867, p. 358. 

 Cojyhomantis Peters, Mon. Berl. Ac, 1870, p. 651. 



Frontoparietal bones not developed, consisting of two narrow, sepa- 

 rated supraorbital plates. Ethmoid largely developed anteriorly, dilated 

 over the anterior part of the orbits, widely separating the oblique pre- 

 frontals. Urostyle attached to two condyles. Belly areolated. No 

 parotoid gland. Pupil round or transverse. Vomerine teeth present. 

 Tongue attached to one-third free, posteriorly. Digital dilatations large 

 or small ; a more or less extensive web between the posterior toes. 

 Coxium not involved in hyperostosis of the cranial bones. 



This genus, embracing more than half the family of Hylid^e, fur- 

 nishesa type of structure intermediate between the extremes offered by 

 other genera, of which that represented by Hypsiboas may be said to 

 be the most typical. This genus is in some degree au epitome of the 

 family in its distribution. The Hylidae have I een created to inhabit 

 the vast world of foliage that shades the tropics of the New World, and 

 restrict the insect life that peoples it, and in proportion to this profusion 

 of vegetable life is the abundance of species. The arboreal Anura as- 

 signed to the same department of the Old World is of a widely different 

 type, and, as has been shown, a branch of the higher stock of aquatic 

 frogs that abound in the Northern Hemisphere, 



