108 



adult female, wliich differs from the adult male in being of an uniform, 

 and very pale, rufous tint on the upper parts of the body, and of a 

 pale yellow on the under parts. The throat, cheeks and shoulder- 

 mark are yellow-white. I suspect it is an accidental variety. It ap- 

 pears to have but four manimse, two of which are situated on the 

 lower part of the abdomen, and the remaining two near the insertion 

 of the fore-legs. 



The skull of Tvpaia ElUoti is smaller, considerably shorter, and 

 has a broader muzzle than that of T. ferrvginea, whilst on the other 

 hand it is longer and larger than that of T. Javanica, which is re- 

 markable for the shortness of the facial portion. These differences 

 approximate the skull under consideration to that of T. Tana ; there 

 are, however, ample differences between the skulls of T. Ellioti and 

 T. Tana. The skull of the former of these two animals is rather 

 smaller than that of T. Tana, has the muzzle relatively shorter, the 

 nasal bones shorter, and broader behind ; the zygomatic arch deeper, 

 and the perforation in the malar bone much smaller (less than half 

 the size). In the structure of the teeth, moreover, there are some 

 differences worthy of note. The incisors and premolars in T. Ellioti 

 are relatively smaller than in T. Tana ; but a more important distinc- 

 tion — and one which distinguishes the new Titpaia from the other 

 three species noticed — consists in the form of the third premolar : it 

 here resembles the last, or fourth premolar in all respects, except- 

 ing in being of smaller size ; having hke that tooth a distinct inner 

 lobe : this lobe in the other species of Tupaia is represented only by 

 a minute and indistinct tubercle. The corresponding lobe in the last 

 premolar in T. Ellioti is larger than usual, and so is the posterior 

 inner lobe of the true molars. Subjoined are the principal dimen- 

 sions of the skulls of the four* species of Tupaia. 



T.Tana. 



Total length of skull 



Length of ditto to the posterior 1 

 margin of the auditory bulla / 



Width of ditto, measuring from 

 the outer surface of the zy- 

 goma 



Width of ditto between orbits 



Length of palate 



of nasal bones 



Width of ditto in front 



of ditto behind 



Length from anterior part of 

 first premolar to hinder mar- 

 gin of last true molar 



Length of lower jaw 



Height of ditto, measured from 1 

 apex of coronoid process ...J 



T.Tana. 



T.ferru-.T.ferru- 

 ginea. giiiea. 



in. lin. 

 2 4 



2 Oi 



1 Of 



n 



1 3J 



IH 



1} 



2i 



94 



1 6| 

 6i 



in. lin. 



2 1 



7 



1 H 



11 



If 



2f 



9| 



1 7 

 6+ 



in. lin. in. lin. 

 2 0. 



1 9 



1 04 



6| 

 04 



H 

 1* 



2* 



9 



1 5i 



2 Of 

 1 10 



1 Oi 



9 

 24 



9 



T. El- 

 lioti. 



in. lin. 



t 



1 n 



104 



6f 

 11 



7 

 14 



1 3 

 6J 



T. Java- 

 nica. 



in. lin. 

 1 4| 



1 24 



64 



84 



4f 



U 



li 



6 



10 



5i 



* I do not include the " Tupai de Pegou," because it is not yet determined that 

 that animal is a distinct species from the Tupaias of the Indian Islands. 

 t The occipital portion of the cranium is wanting in the specimen. 



