70 EEniLES. 



d-f. Adult. Amazon. From IMr. Bates's Collection. 



g. Adult. Para. Presented by R. Graham, Esq. 



h-m. Half-grown. Para. From Mr. Stevens's Collection. 



n, 0. Half-grown. Para. From Mr. Stevens's Collection. 



p. Adult. Andes of Ecuador. From Mr. Eraser's Collection. 



The enormous car-shaped bony plates, formed by the orbital edge 

 of the parietal and temporal bones, are described by Cuvier. But 

 there arc moreover the neiu'al spines of the third to the eighth vertebrae 

 developed as in no other frog, being higher than the centrum of the 

 vertebra, and slightly bifid behind. The bones of the front extremity 

 are relatively more slender than in other toads ; the ridge of the hu- 

 merus is broad, in the femiu' absent. The iliac bones are short and 

 far distant from one another, forming an angle of about 35°. 



Second Series. OPISTHOGLOSSA PLATYDACTYLA. 

 Section I. Hylina. 



0. PLATYDACTYLA with maxiUary teeth and with the ear perfectly 

 developed, 



Fam. 1. POLYPEDATID^. 



Hylina with webbed toes, cylindrical processes of sacral vertebra, 

 and without paratoids. 



Sipwpsis of the Genera. 



1. Acris. Disks small. Toes broadly webbed ; fingers free ; tongue 



heart-shaped. North America. 



2. Hylarana. Toes broadly webbed ; fingers free ; tongue deeply 



notched ; vomerine teeth. East Indies ; West Africa. 



3. Ixalus. Tongue deeply notched ; no vomerine teeth. East Indies. 



4. Polypedates. Toes broadly webbed; fingers slightly webbed, 



none opposite to the others ; tongue deeply notched ; vomerine 

 teeth. East Indies ; Madagascar. 



5. Ehacophorus. Fingers completely webbed. East Indian Islands. 



6. Cornufer. Toes webbed only at the base ; vomerine teeth ; crown 



deeply concave. New Guinea ; Java. 



7. Elosia. Toes webbed only at the base ; vomerine teeth ; crown 



flat. Brazil. 



8. Chiromantis. Two fingers opposite to the two other ones. 



Mozambique. 



9. Hyperolius. No vomerine teeth ; tongue heart-shaped. West 



and South Africa. 



