HYLELLA.—NOTOTREMA. 287 
Widthofheadd . . . . . . . O75 millim. 
Distance of vent from snout . . ..... =... 22 » 
2” ” heel. 2. 2. 2. ww. OR ” 
” - metatarsal joint. . . . . . 27 9 
» » end of fourth toe. . . . . . 87 ” 
This species seems to come nearest to H. sumichrasti, but it is differently coloured 
and has a much more pointed snout. 
The figure is twice the natural size. 
3. Hylella fleischmanni. (Tab. LX XIII. fig. D.) 
Hylella fleischmanni, Bottger, Bericht Senckenb. Ges. 1893, p. 251; Bouleng. Zool. Record for 
1894, Rept. p. 41. 
- Hylelia chrysops, Cope, Proc. Ac. N. Sc. Philad. 1894, p. 196. 
Hab. Costa Rica, San José (Fleischmann & Biolley), La Palma (Underwood), Alajuela, 
Rio Alfaro (Mus. Nac. de Costa Rica), San José. 
Head broad and depressed ; snout very short, without canthus; eyes of moderate 
size, projecting forwards, with narrow upper eyelids, much narrower than the inter- 
orbital space. Tympanum small, entirely hidden below the general integument ; 
pharyngeal ostia open, but narrower than the choane. The third and fourth fingers 
half-webbed, the second and third connected by a rudimentary web, the first free. 
Toes three-fourths webbed. All the disks moderately developed. When carried 
forwards, the heel reaches beyond the snout. Upper parts smooth, lower granular. 
Apparently uniform pinkish white above, but slightly magnified the skin of the back 
is found to be covered with minute black specks, between which pure white points 
are more sparsely scattered. Lower parts whitish; concealed parts of the limbs 
pigmentless. Male with an external subgular vocal sac. 
Width ofhead. . . . . . ee ee) milli. 
Distance of vent from snout . . . ...... . 2 = 4, 
» » heel . 2... wee ORR, 
» » metatarsal joint. . . . . . . 285 ,, 
» ” endoffourth toe . . ... . 88 ,, 
The figure is twice the natural size. 
NOTOTREMA, 
Notodelphys, Weinland, MB. Ak. Wiss. Berlin, 1854, p. 372. 
Nototrema and Opisthodelphys, Ginth. Batr. Sal. pp. 115, 117. 
Nototrema, Bouleng. Batr. Sal. p. 416. 
Pupil horizontal. Tongue entire or but slightly emarginate behind. Vomerine 
teeth. Fingers and toes dilated into terminal disks; the latter webbed. Outer meta- 
tarsals united. Females with a dorsal pouch for the reception of the ova. 
*37 2 
