16 PLEISTOCENE MAMMALIA. 
Texr-ric. 1.—a. Right scapula of a common fox (Canis vulpes) seen from the outer side. 3B. Left scapula 
of an Arctic fox (Canis lagopus) seen from the outer side. Both from Ightham (Lewis Abbott Coll.). 
natural size. 1, glenoid cavity; 2, spine; 38, acromion; 4, coracoid process. 
Text-ric. 2.—A. Pelvic girdle of an Arctic fox (Canis lagopus) seen from the left side. 8. Pelvic girdle 
of a common fox (Canis vulpes) seen from the left side. c. Pelvic girdle of a common fox (Canis 
vulpes) seen from below. pv. Pelvic girdle of an Arctic fox (Canis lagopus) seen from below. The 
Arctic fox is from the Pleistocene of Ightham near Maidstone (Lewis Abbott Coll.), the common fox 
from the Prehistoric alluvium of the Thames Valley, Walthamstow (Brit. Mus.). 4% natural size. 
1, acetabulum; 2, obturator foramen; 3, ischium; 4, sacral surface of ilium; 5, gluteal surface of 
ilium ; 6, ischial tuberosity ; 7, pubis. 
