418 JO URNAL, B 0MB A Y NA TURAL HIST. SO CIHTY, Vol. XXVI. 



a\ 



Supraorbital edges quite with- 

 out any thickening ; incisors 

 generally bent backwards (opis- 

 tliodont). 

 a^. Size larger ; brain-case round- 

 ed, its breadth more than 

 10mm ; palatal foramina 

 penetrating less between 

 morals. 

 a''. Palatal foramina very 

 short, not reaching at 

 all between molars 

 (Sikkim) ... •••(4) pahari. 



/>^ Palatal foramina longer, 

 reaching just between 

 the front part of m^ ... 

 «\ Colour very dark 

 coppery ; under- 

 side scarcely 

 lighter, washed 

 with ochraceous. 

 (South India) ...(5) famuhis. 

 &^ Colour normal, 

 brown ; underside 

 lighter, greyish 

 white. (Burma). .(6) cookii. 

 If. Size smaller, often very small, 

 braincase narrow (less than 

 10mm broad), not specially 

 rounded. Palatal foramina 

 penetrating far between 

 molars ... ... •••C'^) hooduga grouplF. 



/>\ Supraorbital edges thickened in old 

 age ; incisors about upright 

 (orthodont). (S. Burma) •••(8) nitiduhis. 



But further, since the above synopsis was prepared without any 

 thought of a generic split among the mice, and its primary 

 division comes exactly between the House-mice and the Field-mice, 

 the question again arises as to the possibility of re-estabiishing the 



^ Includes booduga (1837), lepidus (1839), ccrvicolor aod strophiatiLs (1845) 

 ierricoZor (I85I), darjilingensis {\^b\'), fulvidiventris Ti,n.A albidiventris (1852) 

 cunicularis (1855), beavani (1866), and dunni (1912). The position of cfervicolor 

 has long: been in doubt, but the study both of the type and of authentic 

 specimens sent by Hodf,''son, inspirit, shows that it is a larjye and rather 

 long'-eared species of the present gfroup. And M. darjilingensis is also the 

 same species and not a member of the musciclus-dubius firroup, as has been 

 supposed. 



