454 E. C. MacDowell. 
tomoses with the popliteus, distally it leaves the bone 4 em. from 
its end. The tendon is flat. It does not become entirely free 
from muscle fibers until after it divides. One tendon is sent to 
Fia. 4. Dissection of the plantar surface of the right foot of the Chimpanzee. 
To show the arrangement of the flexor tendons for the digits. .A, Adductor halluci 
Bb, Flexor digitorum brevis; D, tendons of flexor digitorum longus; F, Flexor 
hallucis brevis; H, tendons of Flexor hallucis longus; M, Abductor digiti quinti; 
Y, cut ends of Abductor hallucis brevis. 
the second digit, the other to the fifth. In the baboon (fig. 5, 
D) the origins and insertions of this muscle are similar. 
Champneys found the tendon of this muscle in his chimpanzee 
fused with the flexor hallucis longus, otherwise it would have 
