The Myology of Chimpanzee and Baboon. 459 
In the chimpanzee, the flexor pollicis brevis is-very closely joined 
with the oblique head of the adductor pollicis. The opponens is 
but feebly developed. In both forms the transverse head of the 
adductor pollicis is well developed and extends well over into the 
palm. 
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Accepted by the Wistar Institute of Anatomy and Biology January 12, 1910. Printed June 21, 1910. 
