ADDENDA. 471 



Page 120. Add a species : — 

 1 a. Rappia betsileo. 

 Eucnemis betsileo, Grandid. Ann. Sc. Xat. (o) xv. 1872, art. 20, p. 10. 



Head very small ; snout rounded, as long as the orbital diameter ; 

 tj'mpanum biddLii. fingers half webbed ; toes three-fourths webbed. 

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

 tarsal articulation reaches the eye or a little beyond. Skin smooth, 

 granulate on the belly and under the thighs ; no strong fold across 

 the chest. Greenish or blacki&li above ; a bright yellow, beneath 

 black-edged, band from the tip of the snout through the eye along 

 each side of the body ; thighs, hands, and feet bright yellow. 



Closely allied to R. JiorstocJcii, but differing in the smaller head. 

 Specimen e of the latter species should be referred to B. betsileo. 



Madagascar. 



a. $. S.E. Betsileo. 



b-d, e~f. 2 ■ East Betsileo. Rev. Deans Cowan [C.]. 



Page 129. Megalixalus madagascariensis. 

 Add:— 

 8-t. 5 . East Betsileo. Rev. Deans Cowan [C.]. 



Sides of head and body, fore limbs, thighs above and beneath, and 

 feet bright yellow. Doubtless the Eucnemis antanosi of Grandidier. 



Page 137. Hylambates microtympanum 

 is to be referred to the genus Rhacophorus. 



Page 142. Add a new species : — 



4. Mantella cowanii. 



Snout subtriangiilar, a little longer than the diameter of the eye j 

 canthus rostralis distinct> loreal region vertical ; interorbital space 

 broader than the upper eyelid ; tympanum distinct, two iifths the 

 diameter of the eye. Pingers and toes moderate, the tips dilated 

 into very small disks ; subarticular tubercles distinct : a small inner 

 metatarsal tubercle. The hind limb being carried forwards along 

 the body, the tarso-metatarsal articulation reaches tlie eye, oc a 

 little beyond. Skin smooth, except on the flanks and the lower 

 surface of the thighs, which are granulate ; a slight fold from the 

 eye to the shoulder. Black; a large spot at the base of the limbs, 

 extending on the humerus and femur, and round spots on the throat, 

 belly, and lower surface of femora yellow ; a broad band encircling 



