258 BATRACHIA SALIENTIA. 
Crown of the head without ossifications, but the supraciliary ridges are slightly 
prominent, and continued behind in straight lines by two angles of the parietal bone. 
Parotoids present; the skin of the back and sides is studded with numerous spaced 
tubercles; lower parts nearly smooth. Toes half-webbed; metatarsal tubercles 
obsolete; no tarsal fold. Blackish above, tubercles brown; black below, thickly 
marked with light-blue spots. (After Cope.) 
Length of body . . . . . . . . . «685 millim. 
» hindlimb. . . . . . .. . 2... 28, 
7 hind foot. . . . . 2... 1... 1B C,, 
Fam. RHINOPHRYNIDA. 
RHINOPHRYNUS. 
Rhinophrynus, Dum. et Bibr. Erpét. Gén. viii. p. 757. 
Form of the body as in Engystoma. Snout pointed, but with the front truncated, 
terminating in a flat circular disk. Auditory apparatus imperfectly developed; no 
tympanum or cavum tympani or eustachian tubes. Skin smooth; a large parotoid 
with smooth surface, hidden below the skin. Sternum rudimentary. Toes webbed. 
1. Rhinophrynus dorsalis. 
Rhinophrynus dorsalis, Dum. et Bibr. Erpét. Gén. viii. p. 758, t. 91. fig. 2; Giinth. P. Z. S. 1858, 
p. 339; Batr. Sal. p. 127, t.12; Bouleng. Batr. Sal. p. 329; Cope, Bull. U. S. Nat. Mus. 
no. 32, p. 11 (1887) ; Rovirosa, La Nat. Mex. (2) i. pp. 156-160, t. 15. figg. A-C (1888) ; 
Dugés, La Nat. Mex. (2) ii. p. 98, t. 5. 
Rhinophrynus rostratus, Brocchi, Bull. Soc. Philom. (7) i. p.196; Miss. Sc. Mex., Batr. p. 98, t. 9. fig. 1. 
Hab. Mexico, Vera Cruz (Sallé), Tuxpan (Cope), Chiapas, Tabasco (Dugés), Tehuantepec 
(Sumichrast), Campeche (Morelet) ; Guatemaua, Peten (Berendt). 
Metatarsus with a large shovel-shaped tubercle. Bluish-grey, with yellowish spots 
on the sides and along the vertebral line, the latter forming a more or less complete 
band. 
This Batrachian shares in Tabasco, with Phrynosoma, the popular name of “Camaléon.” 
Fam. SCAPHIOPODIDA. 
SCAPHIOPUS. 
Scaphiopus, Holbr. N. Amer. Herpetol. i. p. 85. 
Scaphiopus and Spea, Cope, Journ. Ac. N. Sc. Philad. vi. p. 81 (1866). 
Habit stout, toad-like ; pupil vertical. Upper jaw and vomer toothed; tongue entire 
or nearly so. Tympanum present, but generally hidden. Sacral vertebra with strongly 
