﻿18 



PLEISTOCENE MAMMALIA. 



Text-fig. 4. 



Text-fig. 3. — a. Left humerus of a common fox (Canis vulpes) seen from the inner side. b. Left humerus 

 of an Arctic fox (Canis lagopus) seen from behind. Both from Ightham (Corner Coll.). # natural 

 size. 1, head ; 2, greater tuberosity ; 3, lesser tuberosity ; 4, supra-trochlear foramen ; 5, internal 

 condyle ; 6, trochlea ; 7, deltoid ridge. 



Text-fig. 4. — a. Eight radius of a common fox (Canis vulpes) seen from front. b. Left radius of an 

 Arctic fox (Cams lagopus) seen from behind. Both from Ightham (Brit. Mus., No. M.7232, and 

 Corner Coll.). f natural size. 1, surface for articulation with ulna ; 2, surface for articulation with 

 carpus. 



(3) Table of Comparative Measurements of Bones of Anterior Limb. 



Humerus. 



1 . Maximum length 



2. Diameter of proximal end passing across centre of 



articulating surface and greater tuberosity 



3. Antero-posterior diameter of shaft at middle of deltoid 



ridge 



4. Transverse diameter at same point 



5. Maximum transverse diameter at distal end 



C. lupus (left), 



Pleistocene. 



Banwell. 



No. 44640 



(Brit. Mus.). 



1975 



2-5 



1-75 



44 



C. vulpes 



(left). 



Pleistocene. 



Ightham, near 



Maidstone. 

 (Corner Coll.) 



12-3* 



2-6 



115 



0-8 

 2-1 



0. lagopus 



(left). 



Pleistocene. 



Ightham, near 



Maidstone. 

 (Corner Coll.) 



9-4* 



1-9 



10 

 07 

 1-7 



* Figured. 



J 



