ADDENDA. 463 



disks ; subarticular tubercles moderately prominent ; a single meta- 

 tarsal tubercle. Hind limb short. Back with more or less distinct, 

 irregular, longitudinal warts ; a fold from the eye to the shoulder ; 

 lower surfaces smooth, except the hinder part of the belly and the 

 thighs, which are granulate ; a circular flat gland below each thigh 

 on its inner side ; this gland perforated in the male. Dark grey 

 above, with or without darker markings, the most constant being a 

 cross band between the eyes and cross bauds across the hind limbs ; 

 sometimes a light vertebral line ; lower siirfaces dirty white, closely 

 marbled and dotted with black ; lower lip tessellated with black and 

 white. 



Nossi Be, Madagascar, 



96 h. Rana femoralis. 



Vomerine teeth in two small, rather widely separate groups 

 behind the level of the choana?. Head moderate ; snout subtri- 

 angular, truncate ; canthus rostralis angular ; loreal region nearly 

 vertical, distinctly concave ; interorbital space as broad as the upper 

 eyelid ; tympanum distinct, two thirds or three fourths the dia- 

 meter of the eye. Fingers moderate, first not extending as far as 

 second ; toes moderate, three-fourths webbed ; tips of fingers and 

 toes dilated into small, regular disks ; subarticular tubercles small ; 

 a small inner metatarsal tubercle. If the hind limb is carried for- 

 wards along the body, the tibio-tarsal articulation reaches to between 

 the eye and the tip of the snout. Back with more or less distinct, 

 flat smooth warts ; a fold above the tympanum ; lower surfaces 

 smooth, except the hinder part of the belly and the thighs which 

 are granulate ; a circular flat gland with a more or less distinct 

 median depression below each thigh on its inner side. Dark^brown 

 or blackish above ; a black temporal spot ; loins marbled with black 

 and bright yellow ; axillae sometimes yellow ; hind limbs with 

 rather indistinct darker cross bars ; hinder side of thighs black, 

 generally dotted or marbled with yellow ; lower surfaces brown, 

 dotted and marbled with blackish. Male with two internal vocal 

 sacs. From snout to vent 50 millim. 



Madagascar. 



a-d. (5 & hgr. East Betsileo. Eev. Deans Cowan [C], 



90 c. Rana cowanii. 



Yomerine teeth in two small oblique groups behind the level of 

 the choanae. Head moderate ; snout subtriangular, rather promi- 

 nent ; canthus rostralis distinct ; loreal region nearly vertical ; inter- 

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

 half the diameter of the eye. Fingers moderate, first shorter than 

 second ; toes rather short, entirely webbed ; tips of fingers dilated 

 into large disks, the diameter of which equals one third that of the 

 eye; tips of toes dilated into smallei', but well- developed disks; 



