Morphology. or 
the disposition of hair on the arms and fore-arms then 
has the effect of thatch in turning the rain. Again, 
I find that in all species of apes, monkeys, and 
baboons which I have examined (and they have been 
numerous), the hair on the backs of the hands and 
feet is continued as far as the first row of phalanges ; 
but becomes scanty, or disappears altogether, on the 
second row; while it is invariably absent on the 
terminal row. I also find that the same peculiarity 
occurs in man. We all have rudimentary hair on the 
first row of phalanges, both of hands and feet: when 
present at all, it is more scanty on the second row; 
and in no case have I been able to find any on 
the terminal row. In all cases these peculiarities are 
congenital, and Ahe total absence or partial presence 
of hair on the second phalanges is constant in different 
species of Quadrumana. For instance, it is entirely 
absent in all the chimpanzees, which I have examined, 
while scantily present in all the orangs. As in man, 
it occurs in a patch midway between the joints. 
Besides showing these two features with regard to 
the disposition of hair on the human arm and hand, 
the above woodcut illustrates a third. By looking 
closely at the arm of the very hairy man from whom 
the drawing was taken, it could be scen that there was 
a strong tendency towards a whorled arrangement 
of the hairs on the backs of the wrists. This is 
likewise, as a general rule, a marked feature in the 
arrangement of hair on the same places in the gorilla, 
orang, and chimpanzee. In the specimen of the 
latter, however, from which the drawing was taken, 
this characteristic was not well marked. The down- 
ward direction of the hair on the backs of the hands 
