1S81.] AND FROGS FROM SINGAPORE. 225 



the limbs inconspicuous. Tiie length of the manus from the wrist 

 to the tip of the longest finger is nearly equal to the width of the 

 head. Vomerine teeth in two straight ridges, nearly in the same 

 right line ; the distance of the two series apart is scarcely more than 

 half the length of each series ; the ridges commence from the anterior 

 inner margins of the inner nostrils. 



inches. 



Length of head and body 4 -.5 



,, hind limb from anus to end of longest toe 6*75 



foot 2 



„ hand 1*45 



This species much resembles the East-Himalayan and Assamese R. 

 maximus, which it equals or excels in size ; but the tympanum is 

 proportionally twice as large, and the webs of the feet are less 

 developed (they are shorter in the fore feet of R. maximus than in 

 those of R. reinwardti or R. malabaricus) . From R. reinwardti 

 the new form is distinguished by size, coloration, and by the 

 fingers being imperfectly webbed. 



The single specimen sent, Dr. Dennys informs me, was of a beau- 

 tiful emerald-green colour when alive, and belonged to a well-known 

 Chinese merchant named Whampoa, who refused an offer of five 

 hundred dollars for it. When the animal died, it was presented to 

 the Raffles Museum. It is said to have originally come from China ; 

 but the precise locality is not known. 



fn the smaller forms of Rhacophorus, the development of the folds 

 of skin along the sides of the limbs and above the anus is very re- 

 markable. Mr. Wood-Mason called my attention to this in the 

 case of R. maculatus (and I find the same in R. reinwardti), and 

 noticed that this form shows a passage towards the curious Flying 

 Frog of Borneo figured by Wallace in the ' Malay Archipelago,' vol. i. 

 p. 60. 



Rana macrodon. (Plate XXI. fig. 4.) 



I am indebted to M. Boulenger for the identification of this 

 species. The specimens differ considerably from the descriptions 

 given by Dumeril and Bibron*, and by Giinther*, both of whom 

 describe the tympanum as small. This character, however, is, I learn 

 from M . Boulenger, more variable than has hitherto been supposed ; 

 and as there is, in the British Museum, a specimen from Java, the 

 original locality of the species, that agrees with those from Singa- 

 pore, I accept M. Boulenger's opinion. The following is a descrip- 

 tion of the Singapore specimens. 



Head very broad and flat — the breadth across the gape being 

 greater than the distance from gape to muzzle, and equal to the 

 length of the hind foot in females, exceeding it by one eighth to 

 one tenth in males. Snout depressed, rounded at the end ; no trace 

 of canthus rostralis ; the nostrils near the end of the snout and dis- 

 tant from the eye, their distance apart being about half of the in- 



' Erp. G6n. viii. p. 382. ^ Brit.-Mu8. Cat. Batr. Sal. p. 8. 



Proc. Zool. Soc— 1881, No. XV. 15 



