HEMIPHBACTIDiE. 451 



•with, fronto-parietals. Auditory apparatus well developed ; tongue 

 broad, entire, little free. Vomerine teeth ; no parotoid glands. 



" The mandibular teeth are obtuse, and scarcely project above the 

 alveolar margin ; their attachment appears to be the mucous mem- 

 brane only, on vhich account they are readily scraped away. 



" Xiphisternum [sternum, nobis] an emarginate cartilaginous 

 shield. Toes webbed." 



G. umhrinus, Cope, ?. c. p. 206. — Eio Janeiro. 



12. HEMIPHRACTID^. 



Hemiphraetidse, Cope, Journ, Ac. Phitad. (2) vi 1866. 

 Ranidss, part., Mivart, Proc. Zool. Soc. 1869. 



Both jaws toothed; diapophyses of sacral vertebra not dilated. 



The sternal apparatus of Hemiphraetus and Ceratohyla has been 

 figured by M. J. de la Espada. The coraooids and preooracoids are 

 parallel, and the epicoracoid cartilage is remarkable for its great 

 width. 



According to Dr. Broeehi, the vertebrae are opisthocoelian in 

 Hemiphraetus, and the coccyx is attached to two condyles. 



The same author, having studied the structure of the mandibular 

 teeth oi Hemiphraetus, expresses the opinion that these must be 

 considered odontoids rather than true teeth. 



Synopsis of the Genera. 



Vomers and palatines toothed ; tips of fingers and toes not dilated 

 into regular disks ; . . 1. Hemiphraetus, p. 451. 



Vomers and palatines toothed ; tips of fingers and toes dilated into 

 regular disks 2. Ceratohyla, p. 453. 



Palatines and parasphenoid toothed ; tips of fingers and toes dilated 

 into regular disks 3. Amphodus, p. 455. 



1. HEMIPHRACTUS. 



Hemiphraetus, Wagler, Isis, 1828, p. 743 ; Cope, Journ. Ac. Philad. 



(2) vi. 1866, p. 88 ; jEsjiada, Jom. Sc. Lisb. iii. p. 62. 

 Hemiphiaotus, sp., Peters, Won. Bei-l. Ac. 1862, p. 145. 



Pupil horizontal. Tongue entire or slightly nicked, and slightly 

 free behind. Teeth on the vomers and palatine bones. Head large, 

 helmet-shaped; orbit completely enclosed. Tympanum distinct. 

 Fingers with a rudiment of web ; toes webbed at the base ; tips of 

 fingers and toes not dilated into regular disks. Outer metatarsals 

 united. Omosternum rudimentary ; sternum a cartilaginous plate. 

 Terminal phalanges simple. 



South America. 



2g2 



