264 BATRACHIA SALIENTIA. 
distance between the nostrils. Interorbital space wider than the upper eyelid. 
Tympanum distinct, one-third the area of the eye. Fingers free; toes two-thirds 
webbed, the web not reaching the disks of the third and fifth. Disks rather 
smaller than, or equal to, tympanum. No tarsal fold. Upper parts smooth, lower 
granular. A fold across the chest. Back uniform olive-coloured; a brown band 
along the canthus rostralis is continued along the sides of the head and body, fading 
behind, and passing below gradually into the whitish of the lower parts; its anterior 
or supratympanic portion is faintly edged with whitish above, but there is no white 
margin on any portion of the lower margin; no horn-coloured border to the upper 
jaw ; limbs without cross-bands and with the concealed parts pigmentless. Male with 
a large external subgular vocal sac. 
dé. 2. 
Width ofhead . . . . . O75 millim. 10 millim. 
Distance of vent from snout. . . . . . 22 » 25 - 
” 7 heel . . 2. . 1 . 195), 22°5 i, 
» ” metatarsal joint . . 26 » 29 ” 
» ” end of fourth toe. . 85°55 ,, 39 - 
This is one of the smallest of the Central-American Hyle, the male, of which the 
measurements are given, being fully mature with a large vocal sac. Several specimens 
show vomerine teeth only indistinctly, and in one female specimen they have 
disappeared entirely. Enlarged figures of a toothed and a toothless palate are given 
on Tab. LXXIII. 
4. Hyla cherrii. | 
Hyla cherrei, Cope, Proc. Ac. N. Sc. Philad. 1894, p. 195. 
Hab. Costa Rica, Alajuela, Rio Alfaro (Mus. Nac. de Costa Rica, San José). — 
Vomerine teeth between the very large choane, at the apex of a ridge which 
proceeds from the anterior margin of the latter. Snout not prominent, with vertical 
sides, and with straight angular canthus; distance of the nostrils from the eye a little 
less than the diameter of the latter. Tongue longer than wide. Tympanum one- 
half the area of the eye. Fingers almost webless; toes fully webbed. Skin smooth 
above. ‘The yellowish coloration of the back is abruptly separated from the colour of 
the sides by a narrow white stripe which runs from the eye to the sacrum; humerus 
and femur not pigmented. (After Cope.) 
Widthofhead ......... =. =... . 428 millim. 
Length of body . . . .......... . 6,4 
hindlimb . . . . .. ee 45, 
» hindfoot. . . . . 2... ee et 20 
33 
