250 



OYSTiaNATHIDJS. 



1. Plectromantis wagneri. 



Plectromantis wagueri, Peters, I. c. 



Vomerine teeth in two arched series behind the choanse. Snout 

 rounded, rather prominent ; nostril nearer the tip of the snout than 

 the eye ; tympanum four sevenths the diameter of the eye. Tips of 

 fingers not dilated ; first finger longer than second ; toes with a 

 narrow fringe on each side ; two metatarsal tubercles, inner elongate, 

 outer rounded. Skin smooth ; a large elongate gland between the 

 angle of the mouth and the shoulder, surmounted by another the 

 superior and posterior limits of which are not so distinctly defined. 

 Dark brown above, indistinctly spotted with darker ; beneath dirty 

 white, marbled with black. Male with two spine-bearing tubercles 

 on the inner side of the first digit. 



Andes of Ecuador. 



2. Plectromantis rhodostigma. 

 Plectromantis rhodostima, Cojie, Proo. Ac. Philad, 1874, p. 127. 



Yomerine teeth in two short curved series behind the choanee. 

 Snout truncate ; tympanum smaller than the eye. Fingers and toes 

 with well-marked dilatations, and without dermal margins. Heel of 

 extended hind limb reaching the posterior border of the orbit. Skin 

 smooth. Above uniform brown, below whitish ; snout blackish to 

 the orbits ; femora dark brown behind ; a rose-coloured spot in the 

 groin, one on the superior face of the femur, two on the inferior 

 face of the tibia, and one on the superior face of the tarsus. 



Nauta, Upper Amazon. 



15. LIMNOMEDUSA. 



Cystignathus, sp.. Bum. <.$■ Jiibi: viii. p. 392. 

 Limnomedusa, Cope, Journ. Ac. Philad, (2) vi. 1866, p. 94. 

 Litopleura, Espada, Viaj. Pacif., Vertehr. p, 82. 



Pupil erect. Tongue subcircular, free and slightly nicked behind. 

 Vomerine teeth. Tympanum very distinct. Fingers free, toes 

 nearly free, not dilated at the tips. Outer metatarsals united. 

 Omosternum cartilaginous ; sternum with a bony style. Terminal 

 phalanges simple. 



Uruguay. 



1 . Limnomedusa macroglossa, 



Cystignathus macroglossus, Bum. <§• Bihr. p. 405. 



Limnomedusa macroglossa, Cope, I. c., and P-oe, Amer. Phlos. Soc. 



xi. 1869, p. 168. 

 Litopleura maritimum, Myuidci, !. o. 



