217 



The following viiriatiuiis ;uv icprcst'iittMl : 

 Fx-oni Bii^' TaiiilK-liin Ishiml : '>, •> ;iinl l.'» . 

 From P. Tioinan : 5 and t". ; 

 From Laiitiiii^a ; '3 : 



From Great liedau^' : 1. :{. ."), 7, H, i>, lU. \:i and l'> ; 

 From Perlientiau : 2. 4, (5, 11. 12. IS and 14. 



The sexes do not differ apprecialdy in colour (l.ut niaU-H nvrnuj'- 

 slightly larger, the canines of males avcra^'e a little longer and ntouttT, 

 and the zygomatic hreadth is relatively greater). So far as tlw i.n-n.-nt 

 sei-ies goes, sul)adult (/.*'., nearly fidl-grown) individuals do not differ 

 conspicuously in colour from fully adidts ; .piite young individualH 

 have not Iteen available for comparison. 



For measiu-enieuts see table at end ol' thi.- \>n\»'\-. 



Al'l'l.M'I'lHS. 

 The closest known relative of this form i.s wliliout doiil.t I'f.h. runuB, 

 from the North Natiuia Islands. In both of these races the admixtun- 

 of light grev (silvery grey) in the colour of the back has Invonie a 

 fixed^and^verv conspicuous character; they are the only two nu-es of 

 hifpomelanm in which the premolars and molars average larger than 

 usual ; and they are both inhabitants of islands in the South Chuia 

 Sea. Pt. h. canns differs, in fact, only in having, as a rule, the sdvery 

 grey element even more strongly developed and j.nrer in tinge, and the 

 colour of the crown normally paler. 



It must be emphasiiJed, however, that the development of grey in 

 the coloration of the back is by no means a character absolutely 

 confined to these two races, canus and h^>i>h»<. It is, on the contrary . 

 a feature that can r.e traced in all the western races ot the s,.v,es 

 (that is, in all nices inhabiting the region from Borneo westward ) onl.s 

 the admixture of grev is in no other nice so strong and so constant, 

 nor the tinge of the grev colovir so light and silvery. A gn-y ."prink. 

 ling of the dark colour of the back (sometimes even rather heavy) 

 occui-s sporadically in /'/. h. tome^l (Borm'o); is common in //./.. 

 annedeu. (S. Nafuna.) ; present, but the grey colour normally of a 

 considerablv darker tinge, in Pt. h. cnjanu. ( Lng^uio). ir""";"--'' 

 (Mergui Archii>cdago). and ro.uh.rn.!. (Siam. CamlKHlia 1 ulai 

 Condor); thin or sometimes practically absent in PL,. n,h,H.,. 

 (Sem],ilan Islands, Straits of Malacca, off west coa.s of MaL»> 

 Peninsula). It is evident, theivfore. that the .sdvery colour .or ad- 

 ,.ixture to .he colour, of the back in /V. A. .a.... and Uj„... 

 represents only the extreme pha.se of tendencies pivsent in all ^-t m 

 (Indo-Malavan) races of the s|x'cies. 



Instanc-e's ot a sUk-M spr-nkliu, ■>( .1.0 dark -olour of th. W^k .^h 

 grev arc v.rv ,-..„„nou iu .ho s.-vios of r,.y,..;„ ... .. t»ct 

 r,la.iv..|v s,.Mo,„ .l>a. .1 1...... of .1.0 l..ok of .. r(,r..j.«,. .f .. .. 



