South- American Batrachians. 431 



From snout to vetit 2G mm. 



A single specimen from Pcbas, R. Maranon, Peru ; from 

 the collection of Mr. J. J. Mounsey, 1913. 



Leptodactylus diptychus. 



Tongue oval, rather strongly nicked behind. Vomerine 

 teeth in long transverse series behind the choanse, not ex- 

 tending outwards beyond the vertical of the inner borders of 

 the latter. Head as long as broad ; snout rounded, projecting 

 considerably beyond the mouth; canthus rostralis indistinct; 

 loreal region oblique, slightly concave; nostril a little nearer 

 the end of the snout than the eye ; interorbital space a little 

 narrower than the upper eyelid ; tympanum very distinct, 

 tvvo-thirils the diameter of the eye. Fingers moderate, obtuse, 

 first much longer than second ; subarticular tubercles large 

 and very prominent. Tibio-tarsal articulation reaching 

 between the eye and the nostril ; tibia half the length from 

 snout to vent. Toes slender, obtuse, perfectly free, not 

 margined; subarticular tubercles rather large, very pro- 

 minent ; tvvo metatarsal tubercles, inner oval and about half 

 as long as the inner toe, outer round and very small ; a tarsal 

 fold. Skin smooth above, with small warts on the sides of 

 the bod}^ ; a glandular fold above and behind the tympanum 

 and another, narrow but prominent, from behind the upper 

 eyelid to the hip; throat and belly smooth, with a groove 

 defining a ventral disk; lower surface of thighs granulate. 

 (jreyish brown above, the dorso-lateral folds lighter; tym- 

 panum reddish brown ; a dark brown canthal streak ; 

 temporal fold edged with blackish ; lips with dark brown 

 spots ; a brown bar between the eyes and a A-sliaped marking 

 between the shoulders; limbs with narrow dark brown cross- 

 bars ; a white streak, edged on both sides with dark brown, 

 along the back of the thighs ; lower parts white. 



From snout to vent 44 mm. 



A single specimen fiom the Andes of Venezuela. 



Leptodactylus laticeps. 



Tongue roundish, entire. Vomerine teeth in very long, 

 slightly curved transverse series behind the choauae, extending 

 outwards to below the centre of the latter. Head much 

 broader than long, much depressed ; snout broadly rounded, 

 scarcely projecting beyond the mouth; canthus rostralis 

 indistinct ; loreal region very oblique, slightly concave ; 



