12. MBGALISALTJS. 129 



Tongue heart-shaped. Snout rounded, as long as the orbital 

 diameter; tympanum distinct. Fingers slightly, toes two-thirds 

 webbed. The hind limb being carried forwards along the body, the 

 tibio-tarsal articulation reaches the eye. Skin smooth, granidar on 

 the belly and under the thighs. Upper parts dark violet, with 

 round yellow spots ; upper side of thighs coloured. 



E. Africa. 



a. $ . Rovuma Bay. Dr. Livingstone [P.]. (Type.) 



3. Megalizalus madagascariensis. 



Hyperolius madagaaoariensis, Giinth. Cat. p. 88. 

 Eucnemis madagascariensis, Bum. S/- Bibr. p. 528. 

 Hyperolius madagascariensis, iSteind. Novara, Amph. p. 61. 



Tongue subrhomboidal, nicked behind. Snout rounded, as long 

 as the orbital diameter ; tympanum hidden. Fingers webbed at the 

 base, toes entirely webbed. The hind limb being carried forwards 

 along the body, the tibio-tarsal articulation reaches the eye. Skin 

 smooth, granular on the beUy and under the thighs. Greyish above, 

 closely and minutely speckled with brown ; a blackish stripe along 

 the canthus rostralis ; thighs not coloured, or with a few brown 

 specks. Male with a subgular vocal sae and an adhesive disk 

 covering the throat. 



Madagascar. 



The specimens o-r differ much in colour from the typical form. 

 Not having been able to perceive any structural difference whatever, 

 I must consider them merely as a variety of M. madagascariensis, 

 which may be called alboguttata. The blackish stripe along the 

 canthus rostralis is missing, and the upper surfaces (except the 

 thighs and arms) are covered with round, white, black-edged spots. 



4. Megalizalus leptosomus. 



Hyperolius leptosomus, Peters, Mon. Berl. Ac. 1877, p. 619, f. 5. 



Habit slender. Snout short, rounded, as long as the eye ; tympa- 

 num hidden. Fingers vrebbed at the base, toes two-thirds webbed. 

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

 tarsal articulation reaches in front of the eye. Skin smooth, 

 granular on the beUy and under the thighs. Brown ; the snout and 

 three stripes along the back white ; sides of head and body and outer 

 side of leg and tarsus with white dots. 



Chincbxo, W. Africa. 



