128 PROCEEDINGS OF THE ACADEMY OP 



One specimen from Nauta. 



This species has tlie cranial structure and xipliisternal style oi 

 Cystignathus, but the T-shaped pliahmges and disks of Hylodes. 

 The riectromantis ivagneri, Peters, I have examined in Munich, 

 and find it to be closely allied to Cystigiiathus, so far as external 

 appearances are concerned, but further than this I could not ex- 

 amine. It, however, has digital dilatations, and I refer the present 

 species, provisionally, to the same genus, suspecting that such 

 course will be warranted by a fuller investigation of the type spe- 

 cimen. As here defined, it bears the same relation to Cystignathus 

 that Hy lor an a does to Ban a. 



Cystignathus hallowellii, Cope, Proceed. Acndemy, Philada., 1868, 115. Hylodes 

 Italloivellii, Cope, 1. c, 18fi2, p. 153. 



A variet}' from between Balso Puerto and Moyabamba, Peru. 



Gnathophysa ocellata, Linne; Seba, pi. 75, fig. 1. Cystignathus labyrinlliiciis, 

 Dum. Bibr. Castelnan. Pletirodema labyrinthica , Gthr. 



From Nauta. 

 Gnathophysa rubido, sp. nov. 



A much smaller species than the preceding, represented by two 

 males and a female, the former with the nuptial spurs largely de- 

 veloped. The metacarpus of the pollex terminates in one, and 

 the second projects from the metacarpus of the second digit. 

 There is one with three mucrones on each side of the breast. The 

 general form is stout. The toes are without free dermal margins, 

 and the smooth abdominal derm has the discoidal fold. The 

 vomerine teeth form two short transverse open arches behind the 

 nares, not extending outwards beyond, opposite the centres of the 

 latter. There is a dorsolateral fold from' the orbit to near the 

 groin, and another, commencing just below it, extends to the mid- 

 dle of the side, and sends- a short branch down behind the mem- 

 branum tympani. Dorsal surface smooth, pustular between the 

 ilia; tibia pustular above. The head is a wide oval, with a short 

 decurved muzzle, and large eyes. The diameter of the latter ex- 

 ceeds the length to the outer nares, and is nearl}' twice that of the 

 tj'mpanic membrane. Tongue elongate oval, faintly- notched, 

 choanre and ostia near the same size. The heel of the extended 

 hind limb falls short of the orbit. The lateral glandular mass ex- 

 tends from near the axilla to the groin and occupies the width of 

 the side. 



