194 apes and monkeys. 
upper Amazon, at San Paulo, near Ega. They are described as measuring only 
7 inches in length, exclusive of the tail. The tiny little face is furnished with long 
brown whiskers, brushed back over the ears; the general colour of the body being 
brownish-tawny, but the tail elegantly ringed with black. Mr. Bates adds, that 
this marmoset ranges as far north as Mexico, and is the only Amazonian primate 
that wanders far from the great river plain. The silky marmoset has, however, 
also been recorded from Mexico. 
THE PINCHE (jt uat. size). 
The Long-Tusked Marmosets, or Tamarins. 
Genus Midas. 
The marmosets of this group are at once distinguished from those of the 
preceding genus by the circumstance that the tusks, or canine teeth, of the lower 
jaw are considerably longer than the front, or incisor teeth; so that the whole 
series of lower teeth does not present the even and regular height characteristic of 
the short-tusked marmosets. Why Buffon applied the name tamarin to one 
member of this group, we are unaware; but it has been subsequently very 
generally adopted for two of the species, and is a short and convenient name by 
which to designate the entire genus. None of the tamarins have pencilled ears; 
neither, as we have already mentioned, have they ringed tails, although some of 
the species have the back marked with dark and light cross-bands. 
The Negro Tamarin (Midas ursulus). 
One of the best known of all the species is the common or negro tamarin, which 
is found in Guiana and the lower part of the Amazon valley. It belongs to a 
group in which both the forehead and face are hairy, and the hair of the head 
