KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 58. N:0 2. 



31 



as well inter se as with those of melanochir which Matschie has published. The skull 

 of the reddest specimen (n:r 203) is the largest (Pl. VI, fig. 5), but in is also the oldest 

 with sutura coronalis obliterated. —All four specimens are fully adult with well developed 

 crista sagittalis and long canines. With this skull the type skull of melanochir agrees in 

 total and basal length as well as in several other respects except zygomatic breadth, in 

 which respect melanochir more resembles the smaller specimens of this collection. The 

 skull dimensions do not support any hypothese about racial difference. 



ef 

 N:o 242 



ef 

 N:o 239 



N: 



ef 

 o 202 



ef 

 N:o 203 



Greatest length of skull 1 12 



Condylo-basal length 88,3 



Basal length 77 



Zygomatic breadth 80,7 



mm. 107,5 mm. 



Breadth of brain-case 



Least interorbital vvidth 



Width of skull across mcatus attditorius 



» > planum nuchale 



Breadth across outside of m 1 .... 

 Length of upper molar series .... 

 Palate length to tip of spine .... 

 Brain capacity 



50 



11,1 



01,0 



64,6 



33 



30 



39,2 



70 



77 

 83 

 5G : 

 10 

 63 



or» 



33 

 29 ; 

 40, 

 69 



109 

 88 

 77 

 82 

 68, 

 11 

 03 

 65, 

 32, 

 30 

 40 

 80 



3 



2 » 



3 • 

 ti 



5 



115 



90 



79,3 



90,4 



60,5 



12,2 



65,2 



66,2 



35 



29,5 



44 



80 



The difference in brain capacity between t hese specimens is comparatively very 

 great. 



The anterior root of the zygoma is in all situated above the anterior half of m 2 (Pl. 

 VI, fig. 5), even in the young male. The latter is just getting its first permanent premolars, 

 which are cutting the gum. Its dp 2 are still in place, but are in the act of being pushed 

 away by p 2 , the crown of which is already visible. The small milk-canines are still in place. 

 The last molar is just below the gum in both jaws. In the lower jaw none of the milk 

 premolars has fallen out as yet. 



It is very remarkable that the capacity of the brain cavity of this young animal 

 is about 88 ccm., thus more than the maximum of the adult males. It may also be re- 

 membered that this young male is to judge from the colour of the skin most nearly re- 

 lated to the male n:o 242, which has a comparatively small brain. 



Since the above already was put in print I have had the pleasure of receiving a 

 letter from my friend Director Lorenz von Liburnau in which he kindly communi- 

 cates that since he has received still more material from Beni, Mawambi, Moera etc, 

 he is convinced that Colobus variabilis is identical with C. ellioti, and that this also is 

 the case with C. melanochir. 



This is thus fully in accordance with the opinion which I have expressed above. 



The extremely great variability of these red Colobi, as set forth in Lorenz's paper 

 as well as in this one, and the fact that Colobus ellioti was described on insufficient 



