342 Mr. G. A. Boulenger on the 



Rana obsoleta = R. signata, Gthr. 

 Rana paradoxal = R. Ku7iJii, D. & B. 

 Ixalus nubilus=-R. natatrix, Gthr. 



I also informed him that I held his new genus Helicopsoides 

 to be identical with Lepidognathus, established about the same 

 time by Van Lidth de Jeude, and that the Rhacophorus 

 referred by him to R. cruciger, Blyth, could not belong to 

 that Ceylonese species, suggesting its possible identity with 

 R. leucomgstax, of which R. maculatus and Rana longipes of 

 his list (p. 122) are synonyms. I have, however, since 

 received a new Rhacophorus from Baram, described in the last 

 number of these ' Annals ' as R. macrotis, which may be the 

 same as that noticed by him under the name of R. cruciger. 



Dr. Mocquard replied that he agreed as to the identifications 

 of Trop. maculatus, var. torquatus, Helicopsoides , as he had 

 himself independently found out, Rana decorata and R. obso- 

 leta, but reserved his opinion concerning the others. 



I will now endeavour to discuss, and, if possible, clear up 

 these questions, as well as one or two others which have 

 turned up on perusal of Dr. Mocquard's contribution. 



1. Pelturagonia cejjhalum, Mocq. 



On comparison of the description and figures given by 

 Mocquard and a female specimen received from the Paris 

 Museum with the very short description given by Peters and 

 the young male specimen described in the ' Catalogue of 

 Lizards,' I am fully convinced of the identity of this supposed 

 new Agamoid with Japalura nigrilabris of Peters. The 

 young male from Labuan shows distinctly the enlarged lateral 

 scales at the base of the tail, which are, however, very much 

 less developed than in the adult ; and the female from Kina 

 Baloo has a trace of the gular fold, the presence of which is 

 denied by Mocquard. The enlarged caudal scales in the male 

 do not, in my opinion, afford a character of sufficient import- 

 ance for separating generically J. nigrilabris from the other 

 species of Japalura. 



2. Helicopsoides, Mocq., and Lepidognathus, Jeude. 



As I have mentioned above, Dr. Mocquard admits that the 



two genera are identical, although the Bornean species must 



be held distinct from the SSumatran. Helicopsoides was 



described in the 1st July 1890 number of ' Le Naturaliste,' 



* Name preoccupied by Linnaeus, Syst. Nat. 1766. 



