96 EEPTILES. 



first and third lonp;cst. nccarly equal in length ; the second rather 

 longer than the fourth. Toes qnite free, M-ith a very slight fold at 

 the edges ; fourth longest by fiir ; third rather longer than fifth ; 

 metatarsus -with Uyo small blunt tiibercles. Sldn granulated, with 

 symmetrical longitudinal folds on the back ; a prominent glandular 

 fold from the back edge of eye above the tpnpanum to the ann-pit ; 

 tongue elongate, heart-shaped, free and deeply notched behind ; 

 interior nostiils and eustachian tubes rather small ; vomerine teeth 

 in two rather elongate and oblique groups, somewhat behind the 

 level of the hinder edge of the nostrils. Above bro\\Tiish or olive ; 

 back ii-regailarly variegated with darker ; between the eyes a blacldsh 

 spot, in front of which a lighter one ; sides of head Ix-neath the 

 canthus rostralis and the glandiilar fold blackish ; extremities Tvdth 

 darker cross-bands ; hinder side of the thighs dark brown ; under 

 parts dull yellowish ; throat speckled with brown. Length of body 

 1|-" ; length of front extremity ]i" ; length of hinder extremity 3". 



Fam. 3. HYLID^. 



Htlina with webbed toes, dilated processes of sacral vertebra, 

 and without paratoids. 



Si/nojysis of the Genera. 



1. Litoria. First finger opposite to the thi-ee others. Australia. 



2. Pseudacris. Toes slightly webbed at the base; web wanting 



between the two inner toes. 



3. Hyla. Head covered with soft skin ; no finger opposite to the 



three others ; toes all webbed ; no pouch on the back of the 

 female. Cosmopolitan. 



4. Nototrema. Head covered with soft skin ; female with a pouch 



on the back. Central America. 



5. Notodelphys. Head above bony ; female with a pouch on the 



back. Peru ; Mexico. 



(). Trachycephalus. Head above bony; no pouch on the back of 

 the female. West Indies ; South America. 



1. LITORIA. 



Vomerine teeth ; skin of back smooth, or with plaits ; disks very 

 small ; fingers very sHghtly webbed, the fu'st opposite to the three 

 others ; toes half-webbed ; tympanum distinct ; eustachian tubes 

 small ; tongue broad, elliptic, entii'e or slightly notched behind ; 

 males with a subgular vocal sac. Australia. 



Litoria*, Tschudi, Bair. p. 77; Bim^. i^'- Bihr. viii. p. 503. 

 Pelodytes, sp., Gray, Zool. Misc. p. 56. 



* Litoria glandulosa, Bell, Zoul. of the Beagle, p. 42. pi. 18. f. 4, was founded 

 upon a specimen, now in the Collection of tlie British Museum, fi-om Concepcion 



