1. SCAPHIOPUS. 433 
III. Sacral vertebra articulated to coceyx by one condyle ; toes 
_ free or very shortly webbed. 
Vomerine teeth none; sternum with a bony style; vertebre pro- 
IY TD as Sai SC a ..... 5. Leptobrachium, p. 440. 
Vomerine teeth ; ; sternum with a bony ae ; vertebree proccelian. 
. Xenophrys, p. 441. 
Vomerine teeth; sternum with a tie style; vertebrae opistho- 
coelian ;- upper eyelid prolonged into a horn. 
7. Megalophrys, p. 442. 
Vomerine teeth; tongue entirely ae vertebree opisthooee- 
PEAR RAs 2 tas veri) aes, so 6 8. Asterophrys, p. 443. 
1. SCAPHIOPUS. 
Scaphiopus, Holbi, N.-Amer. Herp. i. p. 85; Tschudi, Batr. p. 83; 
Dum. § Bibr. viii. p. 471; Giinth. Cat. p. "38 ; Cope, Nat. Hist. 
Rev, 1865, p. 108, and Journ, Ac, Philad. (2) vi. p: 81. 
Spea, Cope, Jowri. ‘Ac, Philad. (2) vi. p. 81. 
Pupil erect. Tongue subcireular or oval, entire or slightly nicked, 
and free behind. Vomerine teeth in two small groups. Tympanum 
more or less distinct, or hidden. Fingers generally with a rudiment 
of web; toes webbed ; tips of fingers and toes not dilated. Inner 
metatarsal tubercle shovel-shaped ; outer metatarsals separated by 
web. Omosternum cartilaginous, rudimentary ; sternum a cartila- 
ginous plate.  Vertebre proccelian; sacral vertebra with rather 
strongly dilated diapophyses, confluent with coccyx. 
N. America; Mexico. 
Synopsis of the Species. 
- I. Derm of head involved in cranial ossification. 
A round gland on each side of the thorax, 
MET BER EMRE SEU. x %°Sou Patgrac al ws ah ye ae 1. solitarius, p. 434. 
No pectoral gland; canthus rostralis ob- 
solete ; loreal region oblique ........ 2. couchwi, p. 434. 
No pectoral gland; canthus rostralis 
strong; loreal region nearly vertical . 3. rectefrenis, p. 435. 
II. Derm of head free from cranial ossification. 
1. Eustachian tubes moderate. 
Vomerine teeth between the choane ; 
ByPAPAMOMGIINCG rs soiree sak ss 4; hammondit, p. 435. 
Vomerine teeth between the choane ; 
tympanum concealed or scarcely visi- 
ble; skin nearly smooth above...... 5. bombifrons, p. 485. 
Vomerine teeth on a level with the hinder - 
edge of the choane ; tympanum con- 
Pomerat iy Goce 6s CSE DA 6. dugesit, p. 436. 
2 & p 
