92 Darwin, and after Darwin. 
is exactly the same in man as it is in all the anthropoid 
apes. Again, with regard to hair, Darwin notices that 
occasionally there appears in man a few hairs in the 
eyebrows much longer than the others; and that they 
seem to be representative of similarly long and scattered 
hairs which occur in the chimpanzee, macacus, and 
baboons. 
Lastly, it may be here more conveniently observed 
than in the next chapter on Embryology, that at 
about the sixth month the human feetus is often 
thickly coated with somewhat long dark hair over 
the entire body, except the soles of the feet and 
palms of the hands, which are likewise bare in all 
quadrumanousanimals. This covering, which is called 
the lanugo, and sometimes extends even to the whole 
forehead, ears, and face, is shed before birth. So that 
it appears to be useless for any purpose other than 
that of emphatically declaring man a child of the 
monkey. 
(9) Zeeth.— Darwin writes :— 
It appears as if the posterior molar or wisdom-teeth were 
tending to become rudimentary in the more civilized races of 
man. These teeth are rather smaller than the other molars, as 
is likewise the case with the corresponding teeth in the chim- 
panzee and orang; and they have only two separate fangs.... 
They are also much more liable to vary, both in structure and in 
the period of their development, than the other teeth. In the 
Melanian races, on the other hand, the wisdom-teeth are usually 
furnished with three separate fangs, and are usually sound [i.e. 
not specially liable to decay]; they also differ from the other 
molars in size, less than in the Caucasian races. 
Now, in addition to these there are other respects 
in which the dwindling condition of wisdom-teeth is 
manifested—particularly with regard to the pattern of 
