446 E. C. MacDowell. 
a tendon to join that of the profundus for the index. Michaélis 
describes three separate divisions of the profundus in his baboon. 
A tendon for the thumb was given off from the head that supplied 
the fourth digit. Champney’s description of his baboon corre- 
sponds co mine. Testut claims that, with the exception of 
Kia. 3. Dissection of the wrist and muscles of the thumb of the baboon, to 
show the relations of the tendon of the flexor pollicis longus to the profundus. 
The superficial muscles have been removed. A, Tendon of Abductor pollicis 
longus; B, Abductor pollicis brevis; D, Abductor pollicis; 7, Provator quadratus; 
P, Common tendon of flexor digitorum profundus; 7, Tendon to pollex, corre- 
sponding to that of the flexor pollicis longus, in Man. 
