1883.] FROGS FROM NORTHERN PERU. 63? 



marbled with lif!;hter ; a greyish streak from eye to groin on each 

 side and a narrow vertebral line of the same colour ; a white spot 

 on each side of the vent, on hinder side of thighs ; lower surfaces 

 dirty white, throat grey. Male with a large external subgular vocal 

 sac. From snout to vent 17 millim. 

 A single (S specimen. 



8. Leptodactylus rubidus. Cope. 



9. Leptodactylus rhodomystax, sp. n. (Plate LVIII. fig. 2.) 



Tongue oval, slightly nicked behind. Vomerine teeth in two 

 straight transverse series just behind the choanse. Habit stout. 

 Snout rounded, as long as the diameter of the orbit ; nostril nearer 

 the tip of the snout than the eye ; interorbital space a little broader 

 than the upper eyelid ; tympanum two thirds the diameter of the 

 eye. Fingers moderate, first longer than second ; toes moderate, 

 slightly fringed ; tips of fingers and toes slightly swollen ; sub- 

 articular tubercles well developed ; two small metatarsal tubercles. 

 The hind limb being carried forward along the body, the tibio- 

 tarsal articulation reaches the shoulder. Skin smooth ; a glandular 

 lateral fold. Vinaceous brown above ; the cauthus rostralis, the 

 lateral fold, a cross band between the eyes and another on inter- 

 scapular region blackish ; a band round the upper lip pinkish white ; 

 legs with rather indistinct dark cross bands ; hinder side of thighs 

 black, white-spotted ; lower surfaces white, throat and breast marbled 

 with greyish. From snout to vent 25 millim. 



Two young specimens. 



10. Leptodactylus discodactylus, sp. n. (Plate LVIIL 

 fig. 3.) 



Tongue oval, slightly nicked behind. Vomerine teeth in two 

 straight transverse series behind the choante. Snout rounded, a little 

 longer than the diameter of the orbit ; nostril nearer the tip of the 

 snout than the eye ; interorbital space broader than the upper eyelid ; 

 tympanum two thirds the width of the eye. Fingers moderate, first 

 not extending beyond second ; toes slender, fringed ; tips of fingers 

 and toes dilated into small disks ; subarticular tubercles well 

 developed ; two small metatarsal tubercles. The hind limb being 

 carried forward along the body, the tibio-tarsal articulation reaches 

 the anterior border of the eye. Skin perfectly smooth. Olive-brown 

 above, with rather indistinct darker spots forming cross bands on 

 the limbs ; a dark cross band between the eyes ; lower surfaces 

 white, finely marbled with brown. From snout to vent 28 miUim. 



A single § specimen. 



11. BUFO TYPHONIUS, LauF. 



12. Hyla lanciformis. Cope. 



The single, full-grown, specimen is uniform dull olive above. 



13. Hyla taurina, Fitz. 



Proc. Zool. Soc 1883, No. XLII. 42 



