28 MOSTLY MAMMALS 
A survey of a museum or a menagerie will likewise 
_. Show that spots and stripes are by no means equally 
prevalent in all groups of mammals. In the apes, monkeys, 
marmosets, and lemurs, for instance, they never occur; and 
when these animals are diversely coloured, the coloration 
takes the form of patches symmetrically disposed on the 
two sides of the body, but otherwise not following any 
very clearly defined mode of arrangement. Then, again, 
in the hoofed mammals, or ungulates, many species are 
more or less uniformly coloured, although the zebras are 
notable instances of transversely striped animals, while the 
giraffe is an equally notable instance of the blotched type 
of coloration. Among the even-toed (Artiodactyle) sub- 
division of this order it may be also noticed that while in 
the more specialised forms, such as wild cattle and sheep, 
the coloration is more or less uniform, many of the 
antelopes show white transverse stripes on a dark ground. 
Dark transverse stripes are, however, known only in the 
. case of the little zebra-antelope (Cephalophus doriae) of 
' Western Africa, and the gnus; while, although a lateral 
' dark flank-stripe is present in some antelopes, and in the 
gazelles, none of these animals have the whole body marked 
by longitudinal dark stripes. In the case of the deer it 
has been mentioned in the preceding article that certain 
species, like the fallow-deer and the Indian spotted deer, 
are marked with longitudinal rows of white spots at all 
ages; while in the case of other species it will be found 
that the young are similarly marked, whereas the adults 
are uniformly coloured. A similar state of things occurs 
among wild pigs, and also in the tapirs, from which we 
are naturally led to infer that in this group of mammals, 
at least, a spotted or striped type of coloration is the 
' original or generalised condition, while a uniformly coloured 
