is2 READINGS IN EVOLUTION, GENETICS, AND EUGENICS 
to the feet and great toes. Again, as Dr. Robinson observes, the 
attitude, and the disproportionately large development of the arms 
as compared with the legs give all the photographs a striking resem- 
blance to a picture of the chimpanzee “Sally” at the Zodlogical 
Gardens. For “invariably the thighs are bent nearly at right angles 
to the body, and in no case did the lower limbs hang down and take 
the attitude of the erect position.” He adds, “In many cases no 
sign of distress is. evinced, and no cry uttered, until the grasp 
begins to give way.” 
GORILLA 
Fic. 24.—Sacrum of gorilla compared with that of man, showing rudimentary 
tail bones of each. Drawn from nature. (From Romanes.) 
5. Tail.—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 precisely what this doctrine would expect, seeing that 
the nearest allies 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 
to understand how he had managed to retain an organ which had been 
renounced by his most recent ancestors. Nevertheless, as the anthro- 
