2 PRIMATES. 
Subclass I. Unevicutatra. Bipeds, or guadrumana, with the fingers and 
toes elongate, flexible, and armed with claws or nails, 
Order I. PRIMATES. 
The front and often the hind limbs with a distinct thumb opposable 
to the fingers or toes. Teats two or four on the chest. Penis free, 
pendulous. Cutting-teeth 2, 4, or 4. The fingers and toes are 
usually long and flexible, clawed. 
Primates, Linn. 
The Aye-Aye (Daubentonia) has only two kinds of teeth, similar 
in form to the Glires; but it has the other characters of Primates. 
In some Monkeys of the Eastern and Western Hemispheres the 
thumb of the hand is small, or entirely wanting. In the Monkeys 
of the Western Hemisphere it is generally not opposable to the 
fingers; but their hands are so like the hands of other Monkeys 
that no one can mistake them for the fore feet of other Mammalia, 
and they have the rest of the characters of the Primates. 
Synopsis oF SUBORDERS AND FAMILIES. 
Suborder I. Bruana. Hand only with an opposable thumb. 
Family 1. Hommip#. Cutting-teeth 4, contiguous, opposed. 
Suborder II. QuapRuMaNA. Hands and feet with an opposable thumb 
and great toe. . 
* Teeth of three kinds. 
Family 2. Smmmapm. Cutting-teeth 4, contiguous, erect, opposed. 
ostrils in front of nose, se arated by a narrow septum. Claws 
all alike, of thumb broad. Grinders 2.3. Buttocks often callous. 
Eastern Hemisphere. 
Family 3. Cesrp%. Cutting-teeth 4, contiguous, opposed, erect or 
suberect. Nostrils on side of nose, separated Y a very broad. 
septum. Claws all alike, of thumb broad. Grinders $. £, rarely 
8.4%. Buttocks hairy. Western Hemisphere. 
Family 4. Lemuripa. Cutting-teeth 2 or 4, dissimilar, upper small, 
riage in pairs, vertical; lower larger, contiguous, shelving. 
Claw of the second toe subulate; the others flat. Eastern 
Hemisphere. 
Family 5. Tansy. Cutting-teeth 2, subsimilar, erect ; upper large, 
conical, lower small, contiguous. Claws of the second and 
third toes subulate; the others flat. Asia. 
** Teeth of only two kinds. Canines none. 
Family 6. DavBenroyimpm. Cutting-teeth 2, compressed, very 
large, with a space between them and the erinders. Claw of 
thumb flat, of fingers acute. Middle fingers elongate, slender. 
