86 
DISTRIBUTION OF ANIMALS. 
[Fart 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 Encyclopaedia 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. 
II. Lemuroidea. 
Sub-order — Antiirofoidea, 
Fain. 
Hominidm Man. 
( 1. Simiida; Anthropoid Apes. 
2. Semnopitlieeidse ... Old-world Monkeys. 
f 3. Cynopithccidse ... Baboons and Macaques. 
\ 4. Cebidae American Monkeys. 
I 5. Hapalidae Marmosets. 
Sub-order— Lemuroidea. 
Fam 
6. Lemur id se Lemurs. 
7. Tarsiidm Tarsiers. 
8. Cliiromyidse Aye-ayes. 
Omitting man (for reasons stated in the preface) the three 
first families are considered by Professor Mivart to be sub- 
families of Simiidse ; but as the geographical distribution of 
the Old World apes is especially interesting, it is thought 
Simii 
Cebii 
