1. THOEOPA. 331 



Pupil horizontal ; toe3 webbed, the tips verj- slightly dilated ; 

 diapophyses of sacral vertebra very slightly dilated. 



3. Acris, p. 336. 



Pupil horizontal ; toes more or less webbed ; tongue adherent or 

 moderately free behind ; vomerine teeth. 



4. Hyla, p. 337. 



Characters of Hyla, but with a dorsal pouch in the female. 



5. Nototrema, p. 416. 



Pupil horizontal ; toes webbed ; tongue moderately free behind ; 

 vomerine teeth none 6. Hylella, p. 419. 



Pupil vertical ; tongue scarcely free behind. 



7. Nyctiinantis, p. 421. 



Pupil vertical ; tongue extensivel}' free beliind ; inner toe not 

 oijposable 8. Agalychnis, 422. 



Pupil vertical: tongue extensively free behind; inner finger and 

 toe opposable 9. Phyllomedusa, p. 424. 



Pupil vertical ; parasphenoid toothed ; labial margin much pro- 

 longed 10. Triprion, p. 431. 



1. THOROPA. 



Thoropa, Cope, Nat. Hist. Rev. 18Go, p. 110, and Journ. Ac. PJnlad. 



(2) vi. 1866, p. 86. 

 OlolygOD, {Fitziny) Steindachn. Novara, Am^ih. p. 64. 



Pupil horizontal. Tongue heart-shaped, free behind. Vomerine 

 teeth. Tympanum distinct. Fingers and toes free, the tips simply 

 swollen, not dilated into regular disks. Outer metatarsals united. 



Brazil. 



This genus, perhaps, should be united with the following. 



1. Thoropa miliar is. 



Rana miliaris, Spix, Spec. Nov. Test. Han. p. £0, pi. 6. f. 1. 



r Cvstignathus missiessii, Eyd. 4" Soul. Voy. Bonite, Zool. p. 148, 



pi. 10. f. 2. 

 ? Thoropa missiessii, Cope, Nat. Hist. Hev. 1865, p. 110. 

 Ololvgon abbreviatus, {JFitz.) Stcindachn. Novara, Amj^h. p. 65, pi. 4. 



f. 16-18. 

 Hylodes abbrsA-iatus, hensel, Arch.f. Naturg. 1867, p. 151. 

 Ololvgon miliaris, Peters, Mon. Berl, Ac. 1872, p. 206. 



Yomerine teeth in two small groups a little behind the level of 

 the choanas. Head broad, flat ; snout truncate ; loi'eal region con- 

 cave ; interorbital space broad ; tympanum about two thirds the 

 diameter of the eye. First and second fingers equal ; toes very 

 long, indistinctly fringed; two moderately developed metatarsal 

 tubercles. Limbs moderately elongate. Upper surfaces smooth or 



