156 PROCEEDINGS OP THE ACADEMY OP 



Palmation extending to the pallettes. No dermal folds, except on the posterior 

 face of tarsus. Humerus shorter than antebrachium ; tarsus less than half the 

 length of tibia. Length of head and body 9 1. Hinder extremities 16 1. 



Above dark reddish brown, a dark spot on the occiput. Two narrow yel- 

 lowish lines on each side, one from the orbit, one from the tympanum. A 

 light line from the orbit to the angle of the mouth. Two broad oblique bands 

 across the femur, three from the tibia. A brown band extends from one 

 popliteal region to the other, without interruption, on the (?) perinseuni. Be- 

 neath pale rusty ; small brown spots on lower labial region. 



Habitat. Paraguay. Taken on river. Mus. Smithsonian, 



(No. 5494.) 



This species has probably the habits of Rana. It evidently possesses great 

 power in the hinder extremities. The formation of these, aud of the anterior 

 members, remind us of Pseudis. 



Cystignathus podicipinus. 



Tympanum distinct, half the size of the eye. Posterior digits with margins 

 as wide as a phalanx, which unite at their bases, forming a slight web. A 

 tarsal fold continuous with that of the internal digit, except where interrupted 

 by a spur-like tubercle. Tarsus half as long as tibiae. Anterior digits free; 

 first digit longer than the second and fourth ; an elongate tubercle at its base ; 

 an oval median palmar tubercle ; inferior articular tubercles moderate. Head 

 narrow. Muzzle rounded, a little prominent. Tongue oval, subemarginate. 

 Vomerine teeth in two short, separate rows, much behind, and within the 

 marginal line of the posterior nares. Skin smooth above, except a few minute 

 warts on the coccygeal region. Lateral and postanal region verrucose. Total 

 length of head and body 21 1. Anterior extremity 10 1. Posterior extremity 

 2 in. 3 1. Foot and tarsus 14 1. 



Above brown, an elongate, darker triangular spot between the eyes. A yel- 

 lowish line extends beneath the eye to the angle of the mouth. Femora indis- 

 tinctly banded, posteriorly marbled with blackish. Tibiae with three brown 

 bands. Beneath yellowish brown, with numerous yellow spots. 



Habitat. Paraguay. Mus. Smithsonian, (No. 5831.) Philada. Acad. 



This species differs from the other Cystignathi, with margined toes and 

 vomerine teeth behind the nares, in having the latter in straight series, instead 

 of curved, it differs from C. ocellatus and many species with simple 

 digits, in wanting the discoidal folding of the thoracic and abdominal in- 

 tegument. 



Cystignathus p o e c i 1 o c h i 1 u s. 



Tympanum half the size of the eye. Head rather depressed. Muzzle short, 

 not prominent. Tongue oval, subemarginate posteriorly. Vomerine teeth in 

 two well-separated curved series behind the internal nares, the outer ex- 

 tremities of the former on a line with the middle of the latter. A pectoral, 

 lateral, abdominal fold, enclosing the thoracic integument, as a disc. A dermal 

 fold from the posterior border of each orbit to the groin. The heel extended 

 reaches the nostril. Toes not margined, slightly webbed at the base ; their 

 subarticular knobs very prominent. Sole smooth. Internal anterior digit 

 shorter than the third, and longer than the fourth. A large palmar tubercle ; 

 an elongate one at the base of the intern '1 digit. Length of head and body 

 1 in. 10 1. Anterior extremity 10 1. Hinder extremities 2 in. 91. 



Color of surperior surfaces chestnut brown; the sides rather darker, deli- 

 pately marbled next to the pure white abdomen. 



A brown band on the extremity of each canthus rostrlais reaching the labial 

 commissure ; another beneath the anterior part of the orbit. Lips marbled 

 with white and brownish. A narrow brown band above and behind the tym- 

 panum. Some light-bordered brown spots on the anterior face of the femur 



[March, 



