THE INDIVIDUAL DIFFERENCES OBSERV- 
ABLE IN THE SAME SPECIES OF 
ANIMALS. 
An Linfortunate shipwrecked sailor cast on shore upon 
the coast of Africa, and surrounded by a crowd of negroes, 
would not be able to distinguish or see the slightest differ- 
ence (except sex) among these naked black people ; they 
would all appear to him alike, thick-lipped, woolly-headed, 
and black — Sambo, Congo, and Jumbo “ berry much alike, 
specially Jumbo.” It would not, however, be long, should 
he remain among these people, before he would be able 
to recognize the different individuals, and the marked 
similarity that at first struck him would soon disappear, 
and Sambo would appear totally distinct from Congo and 
the rest, not only in his appearance, but in disposition, 
manners, etc. Much in the same way, if we meet a flock 
of sheep of any particular breed they appear as alike as 
possible at first sight ; but upon careful examination they 
will be found to present well-marked and endless differ- 
ences, even to an ordinary observer ; but ask the shepherd 
who has had the rearing and attending to the flock, he 
knows every sheep, and can distinguish them perhaps as 
readily as the huntsman can name every hound in his 
pack. 
Now a pack of hounds to the stranger appears so much 
of the same size, colour, and form, that persons un- 
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