124 



W. T. Blanford — On the species of Marmot 



[No. 3, 



The following are the dimensions of skulls of all the above species in 

 parts of a metre, those of A. robustus having been taken from the figures. 

 I also add the measurements of the skull of a specimen of A. bobac belonging 

 to the Berlin Museum. 





1 i=l 



1 'r3 



*fc o 



Q 



3 





| 



o 





^ 



^& 



^ 



i 



1 



^ 



-1 



Length from occipital plane to an- 



















•105 



•101 



•104 



•093 



•105 



•094 



•0885 



Breadth across widest part of zy- 



















•0655 



•0675 



•065 



•061 



•066 



•057 



•059 



Do. "behind postorbital processes, 



•019 



•019 



•019 



•020 



•016 



■017 



•0165 





•045 

 •010 



•040 

 •013 



•011 



•038 



•011 



•042 

 ■017 



■038 

 •0105 



•038 



Breadth do. behind, 



•0105 



Do. do. in front, 



•018 



•018 



■015 



•016 



•020 



•0165 



•0155 



Length of row of upper molars, . . 



•025 



— 



•025 



•024 



•0235 



-020 



•0215 



Do. lower jaw from angle 



















•069 

 •0425 



•070 

 •039 



■069 

 •037 



•064 

 •036 



•074 

 •041 



•066 

 •035 



•0625 



Height of do. at coronoid process, 



•036 



P. S. — Oct. 2St/i. Some months have elapsed since the above paper 

 was written, and in the meantime, through the kindness of several friends, 

 I have been enabled to add materially to the evidence as to the distinctions 

 of the different species of marmots. 



In the first place, I am indebted to Professor Peters of Berlin, who, 

 with great kindness and liberality, has sent a skin and skull of Arctomys 

 bobac belonging to the Berlin Museum for examination. In its external 

 characters this animal differs widely from A. Himalayamis. It is a sandy- 

 grey animal with a brown wash, without a single black hair on its body, 

 the hairs on the back being dusky at the base, then dirty white, and the 

 tips of the longer hairs on the back and sides being brown. The lower 

 parts throughout shew a ferruginous tinge. The terminal portion of the 

 tail is brown. This skin measures from nose to rump 21 inches, tail 5f ; 

 but it is very much smaller than A. Himalayanus. 



Of course this specimen may have faded and the tips of the hairs may 

 have been black originally, as in Pallas's description, but there is nothing in 

 the character of the skin to render this supposition probable, and if the 

 tips of the hair had become paler, I should hardly have anticipated that 

 they would have done so to precisely the same extent throughout the body. 

 Moreover, the skin before me coincides closely with the figure in Sehreber's 

 Saugetkiere, PI. CCVIII, and witk Messrs. Milne-Edwards' description. 



