552 
MAMMALIA. 
“ Audouin,” writes Isidore Geoffroy Saint- Hilaire, “ has assured 
himself, by experiments several times repeated, that these Monkeys 
were well able to recognise in a picture, not only their own like- 
ness, but that of another animal. Thus, the drawing of a Cat, and, 
what is yet still more remarkable, that of a Wasp, caused them 
manifest dread ; while at the sight of any other insect, such as a 
Grasshopper or a May-bug, they threw themselves on the picture 
as if to seize the object represented. 
“ Audouin has also remarked that the Ouistitis were very 
curious ; that they had acute vision ; that they perfectly recognised 
the people who looked after them; and, lastly, that their cries 
varied considerably, according to the passions that animated 
them.” 
A gentleman who resided in Brazil for several years always 
possessed during his sojurn there several Marmosets ; from his 
experience, he states that they very soon became tame, and much 
attached to those who showed them attention, preferring to sleep 
in his pockets or sleeve to retiring to their nest. “ Their graceful 
tricks were always amusing, as they never were mischievous. 
With my Cats and Parrots they were on terms of the greatest 
intimacy, sharing, of their own accord, their food with the latter. 
They soon learned to drink wine, and, after a short experience, 
exhibited so marked a liking for the juice of the grape, that, if 
permitted, they would indulge till perfectly intoxicated. Nothing 
alarmed them so much as the appearance of a Snake, and several 
times, for the sake of experiment, I had one brought into my 
residence to observe the effect. On seeing their enemy, instan- 
taneously they became powerless, and the woe-begone expression 
of their countenance for the time being was the perfect personifi- 
cation of utter helplessness, and even after the object of their 
dread had been removed, it required the lapse of many hours 
before they recovered their vivacity.” 
At present, about thirty species of Ouistitis are known, and 
these are divided into two genera, founded on a specious distinc- 
tion — the Ouistitis, or Midas, and the Tamarins. We will enu- 
merate the principal species of Ouistitis, merely remarking that 
some among them, which are in almost every respect alike, are 
probably only simple varieties which ulterior observation may 
reduce to the common type. 
