7. PHETNOBATBACHUS. 8. NYCirBATHACHITS. 113 



body, the metatarBal tubercles reach far beyond the tip of the snout. 

 Back with a few scattered small tubercles, and with a glandular fold 

 on each side, reaching from the posterior border of the eye to the sacral 

 region, both convergent on the back behind the shoulders. Above 

 brownish, variegated with darker ; a dark-brown temporal spot ; 

 hinder side of thighs with a dark-brown vitta ; throat brownish. 

 Male with an internal subgular vocal sac. 

 West Africa. 



a. 3 . Coast of Guinea. (Ty^e.) 



J. <J. Coast of Guinea. Sir A. Smith [P.]. 



3. Phrynobatraclius acridoides. 



Staurois acridoides, Cope, Journ. Ac. Philad. 1867, vi. p. 198. 



Habit slender. Snout narrowed, rounded, slightly prominent, 

 with obtuse canthus rostralis ; tympanum distinct, half the size of 

 the eye. Toes two-thirds webbed ; tips of fingers and toes dilated 

 into small disks ; three metatarsal tubercles. The hind limb being 

 carried forwards along the body, the metatarsal tubercles reach be- 

 yond the tip of the snout. Skin with weak tubercles above, and 

 two plicsB convergent from orbits, then divergent and terminating 

 behind scapute. Above dark greyish olive, with frequently a nar- 

 row vertebral band ; a dark band on side, on front and hind face 

 of femur, the latter with a pale one above it. Throat- and breast 

 brown, white punctate. Limbs cross-barred. 



Zanzibar. 



8. NYCTIBATRACHUS. 



Pupil erect. Tongue free, and deeply notched behind. Vomerine 

 teeth. Tympanum hidden. Fingers free; toes webbed, the tips 

 dilated into small disks. Outer metatarsals separated by web. 

 Omosternum and sternum with a bony style. Terminal phalanges 

 bifurcate. 



India. 



This new genus is related to Rana by the general characters, to 

 Rhacophorus by the structure of the distal phalanges, but differs 

 from both by the erect pupil. This appears to be intermediate 

 between the triangular shape, as exhibited by Bombinator, and the 

 elliptical exhibited by Alytes, Pdobates, and others. 



1. Nyctibatraclius pygmseus. (Plate XII. fig. 1.) 



Rana pygmeea, Gfiinth. Proc. Zool. Soc. 1875, p. 568. 



Vomerine teeth in two small oblique series behind the level of 

 the choanse. Habit stout. Snout very short, without canthus 



