244 ANURA CHAP. 



upper eyelid of some species, e.g. of C. nnicolor of New Guinea, 

 has a small tubercle, hence the generic name. The skin of the 

 back is glandular and granular, forming slight folds on the back 

 and on the sides of the head in some species. The male has 

 one or two internal vocal sacs. 



C. corrugatus is one of the most widely distributed species, 

 inhabiting the Philippines, New Guinea, and Duke of York 

 Island. The granular skin forms longitudinal folds on the back, 

 one of which reaches from the eye to the shoulder. Brownish 

 above with darker markings, below yellowish, with or without 

 brown spots on the throat. — Three species inhabit the Fiji 

 Islands. 



Of C. solomonis of the Solomon Islands little is known about 

 the propagation, although the large size of the egg, which 

 measures 5 mm. in diameter, suggests that the young undergo 

 most or the whole of their metamorphosis within the egg. 



Chiromantis is distinguished by the peculiar arrangement of 

 the fingers, the first and second being opposed to the others ; 

 their terminal phalanges are obtuse and support small knol)S or 

 discs. The general shape is that of a frog with long and slender 

 hind-limbs. The tympanum is distinct. 



Ch. xerampelina, the type -species, was discovered by Peters 

 at Mozambique ; it is a middle-sized frog, about 2 inches in 

 length, brown above with reddish spots on the sides ; the male is 

 devoid of vocal sacs. 



Ch. 2^etersi, a native of East Africa, differs from the preceding by 

 the possession of an internal vocal sac. Ch. rufescens — guineensis 

 shows very Httle of the typical grasping arrangement of the 

 fingers ; the two inner ones are separated from the two outer 

 fingers by a wide gap, but they all lie in the same plane, are 

 much webbed and possess large discs, so that by the latter two 

 characters a link is formed with Rhaco2')horns, to which the 

 present genus is closely allied. Total length about 2|- inches. 



Buchholz ^ has observed the peculiar breeding habits of this 

 rather large, brown, and slender tree-frog in the Cameroons. In 

 the month of June he found on the leaves of a low tree, standing 

 in the water, a white foamy mass, like the froth of a lu'oken 

 egg, containing a number of newly hatched larvae and quite 

 transparent eggs. Within three or four days this mass became 



1 Monatsber. Bcrl. Ac. 1875, p. 204 ; 1876, p. 714. 



