86 DISTRIBUTION OF ANIMALS. [PART I. 
The above series of orders is arranged according to Professor 
Flower’s Osteology of Mammalia, and they will follow in this 
succession throughout my work. Professor Huxley arranges 
the same orders in a different series. 
In determining the manner in which the several orders shall 
be subdivided into families, I have been guided in my choice of 
classifications mainly by the degree of attention the author ap- 
pears to have paid to the group, and his known ability as a 
systematic zoologist ; and in a less degree by considerations of 
convenience as regards the special purposes of geographical dis- 
tribution. In many cases it is a matter of great doubt whether 
a certain group should form several distinct families or be united 
into one or two; but one method may bring out the peculiarities 
of distribution much better than the other, and this is, in our 
case, a sufficient reason for adopting it. 
For the Primates I follow, with some modifications, the 
classification of Mr. St. George Mivart given in his article 
“ Apes” in the new edition of the Zncyclopedia Britannica, and 
in his paper in the Proceedings of the Zoological Society of London, 
1865, p. 547. It is as follows: 
Order—PRIMATES, divided into two Sub-orders : 
I. Anthropoidea. 
If. Lemuroidea. 
Sub-order—ANTHROPOIDEA. 
Fan. 
Hominide ... ... Man. 
1. Simiide ..._... .... Anthropoid Apes. 
Sens 4.02 2. Semnopithecide ... Old-world Monkeys. 
3. Cynopithecide ... Baboons and Macaques. 
Cebii § 4. Cebide ... ... ... American Monkeys. 
aeeritaseia oT (5. Hapalide ... ... Marmosets. 
Sub-order-- LemurorpDEA. 
Fam. 
Gememuridte 2. sea le cee ec, emus 
eg TRUIGIS cone dass ys tee ee ener, 
8. Chiromyide iow’ duel eel ewe ge ek B-unaiee 
Omitting man (for reasons stated in the preface) the three 
first families are considered by Professor Mivart to be sub- 
families of Simiide; but as the geographical distribution of 
the Old World apes is especially interesting, it is thought 
