A THIRD COLLECTION OF SIAMESE MAMMALS. 307 



Miller writes " From Traiig to the southern limit of the group li. in. 

 peninsidae appears to be very constant in its characters " ( loe. cit.) but 

 tins, judging from a large amount of material examined, is liardly 

 accurate. Excluding the effects of obvious " bleaching " the colour of 

 the upper parts varies from a clear black ( not common ) to a blackish 

 brown, sometimes indistinguishable from tiie brown of pUaeopepla : tlie 

 nnderparts are also variable — at any rate in Malaj' States animals — lor 

 in a series of them the nnderparts ol one-fourth are as richly coloured 

 as in many of the Siamese and Malayan island forms, including a 

 typical series from Terutau Island, which all ( except B. ni. decolorata] 

 from Koh Samui and Koh Pennan, Coast of Bandon ) differ from the 

 mainland animals, with the above exceptions, in being more richl)' and 

 deeply coloured below ( I have not seem caelanopepla Miller, from 

 Domel Island, Mergui Archipelago). 



Hxcept for size, therefore, pli.aeuiiepla does not seem to be a very 

 clearly marked form ; and young adults are no bigger than peninsulac. 



For measurements see p. 312. 



26. Ratufa aureiventer 



Hiitiijh iijliiiis auieii\'iiti r, BiniliuU', Ann. miJ Mag. Nat. Hi>t., (7), 



V, p. 495(1900). 

 Rtitiifd (inreiri'nter Kloss, antca ji. 82. 

 1 d ad. Bang Nara, Patani, Penin.^ular Siam. 2 July I'JIG. 

 Messrs. Williamson and Smith's collectors. [No. 2489]. 



This example, though in very worn pelage, seems to satisfac- 

 torily confirm my determination of a previous specimen from the 

 same locality. 



For measurements see p. 123. 



27. Ratufa pyrsonota. 



Miller. Pnie. Biol. Soc Waslnngton, IT, p. 75 (1900): Kloss, 

 antoa, ji. 15- 



1 2 aged. Bang Nara, Patani, Peninsular Siam. 2 July 191(3. 



Messrs. Williamson and Smith's collectors [No. 2487]. 



1 rf young adult. Same locality. Mr. C. J. Aagaard [No. 2488]. 



Both examples are in rather worn and faded pelage and so consi- 



t Robinson & Kloss, Ann and Mag. Nat. Hist. (8) xiii, p. 227 (1914). 



VOL II, DEC. rJ17. 



