The Foot. 389 



low the external malleolus. This peroneal tuber- 

 cle has the tendon of the peroneus brevis above 

 it and the tendon of the peroneus longus below it. 

 In front of the tubercle is the base of the -fifth metatarsal 

 bone, while in front of the latter is the base of the 

 first phalanx of the little toe. As the result of the mea- 

 surement of a number of skeletons we found the following 

 to be the average distances between these prominences: 

 On the inner side. From the tip of the internal malleolus 

 to the sustentaculum tali, i.e., the ridge lying directly be- 

 low the malleolus, the average distance was one inch; 

 from the sustentaculum tali to the most prominent part of 

 the tuberosity of the scaphoid, Ij4 inches; from the tip of 

 the internal malleolus to the tuberosity of the scaphoid, 

 1/^2 inches in this triangle is a portion of the astragalus, 

 hidden, to some extent, by the internal lateral ligament. 

 From the tuberosity of the scaphoid to the base of the first 

 metatarsal bone, 1^ inches. Immediately behind the 

 tuberosity of the scaphoid is the inner end of the mid-tarsal 

 joint, while, immediately in front of it is the joint between 

 the scaphoid and the internal cuneiform bones. On the 

 outer side. From the external malleolus to the peroneal 

 tubercle, % of an inch ; from the peroneal tubercle to the 

 base of the fifth metatarsal, 1^ inches. Between these 

 prominences, i.e., the peroneal tubercle and the base of 

 the fifth metatarsal bone, is situated the outer extremity 

 of the mid-tarsal joint. This mid-tarsal joint is % of 

 an inch from the peroneal tubercle, and ^4 of an inch 

 from the base of the metatarsal bone, so that, the joint 

 lies a little nearer to the base of the fifth metatarsal than it 

 does to the tubercle. The tip of the external malleolus 

 projects \y& inches below the level of the upper border of 

 the ankle joint, while the tip of the internal malleolus is 

 s/8 of an inch below the same level ; the former, therefore, 

 being half an inch longer than the latter. 



