1. THOEOPA. 331 



Pupil horizontal ; toes webbed, the tips very slightly dilated ; 

 diapophyses of sacral vertebra very slightly dUated. 



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. Nyctimantis, p. 421. 



Pupil vertical; tongue extensively free behind; inner toe not 

 opposable 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. THOEOPA. 



Thoropa, Cope, Nat. Hist. Sev. 1865, p. 110, and Jom-n. Ac. PMad. 



(2) vi. 1866, p. 86. 

 Ololygon, (Fitzing) Steindachn. Novara, Amph. p. 64. 



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

 teeth. Tympanum distinct. Kngers 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 miliaris. 



Rana miliaris, Spix, Spec. Nov. Test. Ran. p. SO, pi. 6. f. 1. 



? Cystignathus missiessii, Eyd. 8/- Soul. Voy. Bonite, Zool. p. 148, 



pi. 10. f. 2. 

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

 Ololygon abbreviatus, (Fitz.) Steindachn. Novara, Amph. p. 65, pi. 4. 



Hylodes abbreviatus, Hensel, Arch.f. Naturg. 1867, p. 151. 

 Ololygon miliaris, Peters, Mon. Berl. Ac. 1872, p. 206. • 



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

 the ohoanse. Head broad, flat ; snout truncate ; loreal region con- 

 cave ; interorbital space broad ; tympanum about two thirds the 

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

 long, indistinctly fringed; two moderately developed metatarsal 

 tubercles. Limbs moderately elongate. Upper surfaces smooth or 



