Frogs in the British Museum. 107 



loreal region very oblique, feebly concave; nostril equi- 

 distant from the eye and the tip of the snout; interorbital 

 space as broad as the upper eyelid ; tympanum very distinct, 

 two-thirds to three-fourtlis the diameter of the eye. Fingers 

 obtusely pointed, first, second, and fourth equal ; subarticular 

 tubercles moderately large, moderately prominent. Hind 

 limb rather short, the tibio-tarsal articulation reaching the 

 eye, the heels meeting or very feebly overlapping when the 

 limbs are folded at right angles to the body; tibia a little 

 more than twice in length of head and body; toes obtusely 

 pointed, two-thirds webbed, three phalanges of fourth and 

 one of iifth free ; subarticular tubercles ratiier small, mode- 

 rately prominent ; two small metatarsal tubercles, inner oval 

 and about one-third the length of the first toe, outer round ; 

 a small round tubercle on the tarsus just below the heel. 

 Skin smooth or granulate above, with four interrupted 

 narrow glandular fohls along the back and a stronger dorso- 

 lateral ; a glandular fold from the eye to the shoulder; sides 

 granulate. Greyish olive above, with a whitish vertel)val 

 band or narrow streak, the dorso-lateral folds also whitish ; 

 back with dark spots or a dark band on each side of the light 

 vertebral ; a dark brown band from the end of the snout to 

 the eye, continued behind the latter as a large temporal spot; 

 tympanum reddish brown ; a white streak along the upper 

 lip; limbs with dark cross-bands; a white line along the 

 inner side of the tibia ; hinder side of thighs brown, with or 

 without two interrupted white streaks; throat and belly 

 white, lower surface of limbs flesh-colour. Male with a 

 blackish ( xternal vocal sac on each side of the throat, close to 

 the mandible, as in R. mascarenienxis. 



The male measures 27 mm. from snout to vent, the 

 female 31. 



Two specimens, the female with the body distended with 

 eggs, were obtained by M. F. Lataste at Medine, Senegal, in 

 September 1885. They were identified by me at the time as 

 R. mascareniensis. 



The smallest African frog of the genus Rana. Inter- 

 mediate between R. mascareniensis, D. & B., and R. trinodi^, 

 lioettg. 



Microhyla lataslii. 



Habit rather slender. Head as long as broad ; snout 

 obtusely pointed, as long as the orbit, projecting ; interorbital 

 space much broader than the upper eyelid, a little broader 

 than the space between the nostrils. Fingers and toes mode- 



