1. MANTELLA. 141 



1. MANTELLA. 



Pupil horizontal. Tongue elongate, free and distinctly nicked 

 behind. Tympanum distinct. Fingers and toes free, the tips 

 dilated into regular disks. Outer metatarsals united. Omosternum 

 and sternum with a bony style. Terminal phalanges T-shaped. 



Madagascar. 



1. Mantella betsileo. 



Dendrobates betsileo, Granclid. Ann. Sc. Nat. (5) xv. art. 20, p. 11. 



Snout subacuminate, as long as the diameter of the eye, with 

 angular canthus rostralis ; lorcal region vertical ; interorbital space 

 broader than the upper eyelid ; tympanum more or less distinct, 

 about half the width of the eye. Fingers rather slender, first not 

 extending as far as second ; toes moderate, tips of fingers and toes 

 dilated into small disks ; subarticular tubercles distinct ; two small 

 metatarsal tubercles. The hind limb being carried forwards along 

 the body, the tarso-metatarsal articulation marks the eye or the tip 

 of the snout. 8kin of back minutely granulate ; a more or less 

 distinct fold from the eye to the shoulder. Upper surface of head 

 and back uniform light olive, sides and lower surfaces black, the two 

 coloiu's sharjily defined ; limbs dark olive, indistinctly barred with 

 darker ; a light line on the upper lip, extending to the base of the 

 arm ; lower surfaces spotted with light olive. 



Madagascar. 



a-d. 5 & hgr. Mohambo. 



2. Mantella ebenaui. = /Tz^. ^^e^^-^S^^^ . 



Dendrobates ebenaui, Boettg. Zuol. Anz. 1880, p. 281. 



Head short, subtriangular ; tympanum half the size of the eye. 

 First and second fingers equal ; tips of fingers and toes dilated into 

 very small disks ; subarticular tubercles well developed ; two meta- 

 tarsal tul)ercles. Skin of back minutely granulate. Above with a 

 broad light zone — silvery in the male, greenish golden in the 

 female, — well defined from the black colour of the sides ; limbs dark 

 grey, ^^•ith rtithcr indistinct black spots and stiipes ; a silvery- white 

 line round the upper lip, extending to the base of the arm ; beneath 

 black, white-spotted. 



Kossi Be. 



3. Mantella madagascariensis. 



Dendrobates madagascariensis, Grandid. J. c. p. 10. 



Skin finely shagreened. Male uniform bluish black : belly with 

 light blue spots ; thighs and inner side of legs beautiful red. 

 Female deep black, with a light- green spot at the base and in front 



