INVESTIGATIONS ON PARAGUAYAN BATRACHIANS. 
227 
form leather-brown above, indistinctly cross-barred on the limbs ; female 
with confluent darker marbling on the back and sharply pronounced cross¬ 
bars on the limbs ; lower surface white. 
18. Hyla nasica Cope. 
Hyla nasica Cope, Proc. Ac. Philad., 1862, p. 354 ; Boulengeb, Cat. Batr. Sal., 
1882, p. 376, and An. Mus. Genova, (2) VII, 1889, tab. II, fig. 4; Boettger, Zeitschr. 
f. Naturw., LVIII, 1885, p. 247. 
! Hyla Vauterii Hensel (nec Bell.), Arch. f. Naturg., 1867, p. 157 (sec. spec. 
typ.). 
? Hyla granulata Peters, Monatsber. Akad. Berlin, 1871, p. 651. 
31 specimens, the largest 48 mm. from snout to vent. 
Tongue subcircular, slightly nicked behind. Vomerine teeth in two 
short series between the centres of the choanae, sometimes on a 
level with the anterior edge of the latter, close together, sometimes 
contiguous. Head rather small, about as long as broad. Snout subacumi¬ 
nate, longer than the orbit, once and a half to once and two thirds 
the diameter of the eye; canthus rostralis none; loreal region obli¬ 
que ; nostril from the eye as far as the diameter of the latter. 
Interorbital space broader than the upper eyelid. Tympanum very distinct, 
its horizontal diameter slightly more than half the diameter of the eye. 
Fingers free or with a slight rudiment of web ; first much shorter than 
second, latter distinctly shorter than fourth; two metacarpal tubercles, 
the inner oval and smaller, the outer much larger and more or less heart- 
shaped (in front longitudinally bisected by a more or less deep furrow); 
palmar surface more or less granular. Toes two-third webbed, third toe 
equal with the fifth : disks cross-elliptically, about two thirds the diameter 
of tympanum ; subartieular tubercles moderate ; a larger inner and a 
smaller outer metatarsal tubercle ; no fold along the inner edge of the 
tarsus. Tibio-tarsal articulation mostly reaches between the eye and the 
nostril, sometimes the tip of the snout. Skin more or less, but always 
distinctly granulate above, strongly granulate beneath, finely on the 
throat ; a fold from the eye above the tympanum, curved to the arm. 
Male with a median vocal sac. 
Coloration already by Hensel very suitably described. Upper sur¬ 
face varies from dark rufous-brown through greyish- or yellowish-brown 
to light brown and ashgrey. Between the eyes generally a triangular 
dark spot arises from the outer edge of the upper eyelid as a narrow stripe 
and is directed backwards with its tip ; this spot sometimes replaced by 
a dark band, sometimes broken into spots. On the scapular region mostly 
two isolate crescent-shaped markings, sometimes confluent to a triangle, 
15* 
