HYLODES.—CALYPTOCEPHALUS. 241 
The characters of this frog are very imperfectly known; it is said to have been 
captured forty leagues north of the city of Mexico. 
Hylodes lineatus. 
Hylodes lineatus, Brocchi (nec Schneid.), Bull. Soc. Philom. (7) ui. p. 22; Miss. Se. Mex., Batr. 
p. 59. 
Hab. Mexico * (Bocourt). 
Head elongate-oval, with the end of the snout truncate : tympanum two-thirds the 
size of the eye. ‘longue oblong, without notch behind. Toes with a rudimentary 
web; two metatarsal tubercles. Greyish-rose-coloured above, with a very narrow 
vertebral line. 
Hylodes latrans. 
Lithodytes latrans, Cope, Amer. Nat. 1878, p. 186; Bull. U. S. Nat. Mus. no. 17, p. 25 (1880). 
Size rather large. Skin smooth, that of the abdomen thrown into a disk by a 
circular fold. Disks of fingers and toes small. Digits long, toes rather short; first 
finger considerably longer than the second, but shorter than the fourth; heel projecting 
beyond the snout, when the hind limb is stretched forward. Loreal region oblique. 
Diameter of the eye exceeding the long diameter of the tympanum by one-half of the 
latter. WVomerine teeth in two short transverse patches, nearly in a line with the 
posterior border of the choane. Brownish-grey above, with a few large brown spots 
with pale centres; a brown band connects the orbits round the end of the snout. 
Limbs cross-banded.—Length of the body 76 millim.; of the hind limb 107 millim.— 
Cretaceous limestone cliffs of Texas. (After Cope.) 
CALYPTOCEPHALUS. 
Calyptocephalus, Dum. et Bibr. Erpet. Gén. vii. p. 447. 
Phrynocerus, Cope, Proc. Ac. N. Sc. Philad. 1862, p. 157. 
Vomerine teeth present. Head covered with a dermal ossification, forming a 
complete orbit. Tympanum distinct. Toes webbed, without disks. Outer metatarsals 
incompletely separated. Sternum a cartilaginous plate. 
1. Calyptocephalus testudiniceps. 
_ Phrynocerus testudiniceps, Cope, Proc. Ac. N. Sc. Philad. 1862, p. 157. 
Calyptocephalus testudiniceps, Cope, Nat. Hist. Rev. 1865, p. 112. 
Hab. PAaNaMa. 
Skin with flat tubercles. Yellowish or greenish, marbled with black. : 
* The exact locality given by Brocchi is “ Attillan,” which is probably a misprint for Atitlan, a place in 
the State of Oaxaca. 
