GENERAL DIFFEKEXCES. 327 



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2 inches ; nose to auditory opening, 1^ inch ; 

 height of ear from behind, 1 inch. 



The skull differs in being generally smaller; 

 the cranial portion of the skull in its superior 

 outline is much narrower and smoother. The 

 nasal bones are shorter and broader, and rounded 

 at their posterior articulation, instead of being 

 deeply notched, as in L. princeps. Distance from 

 anterior molar to incisors much less; auditory 

 bulke much smaller. Incisors shorter and 

 straighter, and very deeply grooved on the 

 anterior surface. Molars smaller, but otherwise 

 similar in form. Length of skull, 1^ inch. 



General differences from Lagomys princeps : 

 First, in being smaller, 1J>- inch shorter in total 

 length ; the ear, measured from behind, ^ inch 

 shorter; the colour generally darker, especially 

 the lower third of the back. Secondly, in the 

 structural differences of the skull ; for although 

 these differences are not prominent or well-defined, 

 yet they are unquestionable specific variations. 

 Thirdly, in the habit of constructing a nest of 

 hay for the whiter sleep, and in living at a much 

 o-reater altitude. 



o 



There is a strange indescribable delight in 

 discovery, and in finding animals for the first time 

 in their native haunts, animals that before one had 



