82 Darwin, and after Darwin. 
and no cry uttered, until the grasp begins to give 
way.” 
(5) Zatl.—The absence of a tail in man is popularly 
supposed to constitute a difficulty against the doctrine 
of his quadrumanous descent. As a matter of fact, 
however, the absence of an external tail in man is 
o 
fr 
a. “tae 
( © Nh 3 
GORILLA 
Fic. 15.—Sacrum of Gorilla compared with that of Man, showing the 
rudimentary tail-bones of each, Drawn from nature (2. Coll. Surg. 
Mus.). 
precisely what this doctrine would expect, seeing that 
the nearest allics of man in the quadrumanous series 
are likewise destitute of an external tail. Far, then, 
from this deficiency in man constituting any difficulty 
to be accounted for, if the case were not so—i.e. if man 
did possess an external tail,—the difficulty would be 
