420 SYZIBM. 



Tostralis distinct; loreal region vertical; tympanum indistinct; 

 eustachian tubes minute. Fingers one-third webbed ; toes nearly 

 entirely webbed; disks moderate; subarticular tubercles scarcely 

 distinct. Reddish-grey above, with three dark A-shaped markings, 

 the anterior one between the eyes and less distinct; legs with 

 blackish cross bands. 

 Brazil. 



2. Hylella carnea. 



Hylella carnea, Cope, Proc. Ac. Philad. 1868, p. 111. 



Tongue round. Head broad and rounded ; end of snout vertical; 

 canthus rostralis moderately distinct ; eyes large and proiainent ; 

 tympanum indistinct and small. Fingers one-third webbed ; disks 

 of moderate size. Limbs slender. Skin smooth above ; tympanum 

 surmounted by a fold. The exterior coloration does not appear on 

 the femur, and only as a faint line on humerus ; the pigment is 

 light rose-yellow ; three narrow bands across tibia, two across 

 forearm ; a broad blood-red band between the eyes, each extremity 

 sending a blood-red band on each side the back to the vent, with a 

 connecting spot of the same on the coccyx ; a deep red baud from 

 scapular region to end of snout ; beneath uniform whitish. 



Upper Amazon. 



3. Hylella buckleyi. (Plate XXV. flg. 5.) 



Tongue circular, slightly nicked. Head broader than long ; snout 

 rounded, as long as the diameter of the orbit ; canthus rostralis very 

 indistinct ; loreal region high, oblique ; iuterorbital space broader 

 than the upper eyelid ; tympanum extremely small, scarcely distinct. 

 Fingers webbed at the base, first and second equal ; toes two-thirds 

 webbed ; disks weU developed, those of the fingers half the diameter 

 of the eye ; subarticular tubercles little developed. The hind limb 

 being carried forwards along the body, the tibio-tarsal articulation 

 reaches the tip of the snout. Skin smooth, belly and lower surface 

 of thighs granulate. Head and back uniform purplish blue ; upper 

 lip white-margined ; forearm, tibia, and a narrow, very indistinct 

 line along the femur and tarsus blue ; in one specimen the tibia and 

 femur are dotted with white, the remaining parts not coloured. 

 Male with an external subgular vocal sac. From snout to vent 

 29 millim. 



E. Ecuador. 



a. (3 . Intac. Mr. Buckley [0.1. 



b. $ . Paitanga. Mr. Buckley [O.J. 



4. Hylella sumichrasti. 



Exerodonta sumichrasti, Brocchi, Bull. Soc. PhUom. (7) iii. p. 20. 

 Tongue euboircular, slightly nicked. Head as broad as long; 



