INVESTIGATIONS ON PARAGUAYAN BATRACHIANS. 
211 
3, Engystoma ovale Schn. 
Rana ovalis Schneider, Hist. Amphib., 1799, p. 13. 
Engystoma ovale Boulenger, Catal. Batr. Salient., 1882, p. 163; Ann. & Mag. 
Nat. Hist. (5) XVIII, 1886, p. 439 ; Ann. & Mag. Nat. Hist. (6) XIII, p. 347 ; Pe- 
racca, Boll. Mus. Torino, X, 1895, p. 23; Berg, Anal. Mus. Nac. de Buenos Aires 
V (2, II) 1896-97, p. 159. 
Engystoma ovale Schn. var. bicolor Val., Boettger, Zeitschr. f. Naturw., 
LVIII, 1885, p. 240; Boulenger, Ann. & Mag. Nat. Hist. (5) XV, 1885, p. 195; 1. c 
(5) XVI, 1885, p. 296. 
From the descriptions differing by the absence of the dermal ridge 
between the choanae. By the struetur of its upper jaw belongs to my 
groupe Eleutherognathinae. 
Fam. CYSTIGNATHIDAE. 
4. Pseudis minuta Günth. 
Günther, Catal. Batr. Salient., 1858, p. 6 ; Boulenger, Catal. Batr. Salient. 
1882, p. 187, pi. XIV, fig. 1, la. 
Diapophyses of sacral vertebra cylindrical. Vomerine teeth in two 
w' w-like in the middle nearly united series between the choanae, exten¬ 
ding beyond the level of the hinder edge of the latter, as Boulenger’s 
figure shows. Tympanum rather indistinct, as large as the eye. Fingers 
and toes pointed. Tibio-tarsal articulation reaching far beyond the tip of 
the snout. Above brown with darker spots ; hind limbs cross barred ; 
beneath whitish-brown with waved brown lines; hinder side of thighs 
marbled with white. 
I received one specimen from 42 mm. length in a very bad con¬ 
dition. 
5. Paludicola signifera Gir,* 
(Pl. XIII, fig. 6.) 
Rhino derma signifera Girabd, Proc. Ac. Pliilad.. 1853, p. 424. 
Gomphobates notatus Reinhardt et Lütken, Vid. Meddel., 1861, p. 173, tab. 
IV, fig. 3. 
* It seems that Liuperus biligonigerus Cope (Proc. Ac. Philad., 1860, p. 517) cannot 
be placed in the synonymy of this species, because Cope characterises as follows : 
A very stout form ; a few glandulous elevations between and posterior to the eyes, 
and upon the anterior part of the back ; two rounded tuberosities on the carpus ; 
femora very stout ; tarsus equal to the fore arm in length ; two metatarsal tubercles 
tiped with brown ; metatarsus not tuberculous ; a blotch extending from eye to 
