HYLODES. 239 
each. Eustachian openings minute; tympanum indistinct, with a diameter less than 
one-half of that of the eye-slit. Snout narrowly truncate and depressed, with obtuse 
canthus rostralis. Digital dilatations large; first finger shorter than the second ; heel 
reaching beyond the snout, if pressed forwards. Abdomen smooth. Dark brown above, 
snout paler than interorbital space ; pale brown below. (After Cope.) 
Length ofbody . . 2... . . . ee... 20 millim. 
” hindlimb. © 2. 2... 2... 
» hind foot. 2. 2. 2. 2... 2 7 
- tarsus... . . ww eee ee BG, 
22. Hylodes lanciformis. 
Lithodytes lanciformis, Cope, Proc. Am. Phil. Soc, xvii. p. 88 (1877). 
Hab. “ West Coast or CentraL AMERICA.” 
Head nearly twice as long as the pelvis. Vomerine teeth in two fasciculi, situated 
behind the level of the choane. Tympanum not narrowed, two-thirds the size of 
the eye. Snout narrowed, with well-defined canthus rostralis ; nostrils nearly terminal. 
Skin without dermal folds. Disks of fingers small, of toes of medium size. Dark 
ash-coloured above, with a white vertebral line. A broad black band extends from 
the end of the snout across the tympanum, where it contracts to a narrow black line 
extending to near the middle of the side. Hind limbs cross-banded, with the concealed 
surfaces uniformly dusky. A dark interorbital cross-band, in front of which the snout 
is very pale. Upper lip and lower parts without spots. (After Cope.) 
Length of body . . . 2... . . ee ee «26 millim. 
» hindhmb. . 2... 1... ee... BO, 
23 (24). Hylodes megacephalus. 
Lithodytes megacephalus, Cope, Journ. Ac. N. Sc. Philad. viii. p. 110, t. 23. fig. 11 (1875). 
Lithodytes pelviculus, Cope, Proc. Am. Phil. Soc. xvii. p. 89 (1877). 
Hab. Costa Rica, Las Delicias, Santa Clara, alt. 500 metres (Underwood, in Mus. Nac. 
de Costa Rica), Pico Blanco, alt. 6000 feet (Gadd). 
Habit rather stout. Head large, broad, with a raised bony supraciliary ridge, which 
terminates on the occiput, rather more swollen in adult than in younger specimens. 
Snout broad, short, with distinct canthus rostralis, and sloping, concave loreal region. 
Tympanum vertically oval and two-thirds the size of the eye in a large female; 
round, nearly the size of the eye in a younger female. WVomerine teeth in two short, 
approximated, transverse series, behind, but just within the inner margin of, the 
choane. Skin smooth or with minute granules, but with a linear fold above the 
tympanum, converging towards the middle of the back, not continuous with another 
similar fold which runs forward from the groin and terminates in the iliac region, 
*312 
