HEMIPHRAOCTID®. 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 which account they are readily scraped away. 
‘‘Xiphisternum [sternum, nobis] an emarginate cartilaginous 
shield. Toes webbed.” 
G.umbrinus, Cope, 1. c. p. 206.—Rio Janeiro. 
12. HEMIPHRACTIDA. 
Hemiphractide, Cope, Jowrn. Ac. Philad. (2) yi. 1866. 
Ranidé, part., Mivart, Proc. Zool. Soc. 1869. 
Both jaws toothed ; diapophyses of sacral vertebra not dilated. 
The sternal apparatus of Hemiphractus and Ceratohyla has been 
figured by M. J. dela Espada. The coracoids and precoracoids are 
parallel, and the epicoracoid cartilage is remarkable for its great 
width. 
According to Dr. Brocchi, the vertebrae are opisthocelian in 
Hemiphractus, and the coecyx is attached to two condyles. 
The same author, having studied the structure of the mandibular 
teeth of Hemiphractus, 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 
MUbO Mer war Giskss. 5 sii). 9 knee dls 1. Hemiphractus, p. 451. 
Vomers and palatines toothed ; tips of fingers and toes dilated into 
HOS WUaLe Was ah sas Pe. hein, Five a 2. Ceratohyla, p. 453. 
Palatines and parasphenoid toothed; tips of fingers and toes dilated 
imboTesular disks. . 4.6 ayers gees 3. Amphodus, p. 455. 
1. HEMIPHRACTUS. 
Hemiphractus, Wagler, Isis, 1828, p. 743; Cope, Journ. Ac, Philad. 
(2) vi. 1866, p. 88; Lspada, Jorn. Se. Lisb. ii. p. 62. 
Hemiphractus, sp., Peters, Mon. Berl, 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. 
