INTRODUCTION TO PART I 



1 



"^HOSE mammalian forms occupying the upper extremity of the 

 vertebrate phylum have, since the time of Linnaeus, been known as 



Primates, or chief of mammals. It was Linnaeus who, recognizmg 

 the anthropomorphous characteristics of this large group, created the term 

 to designate their order. He further subdivided them into Humans, Simians 

 and Prosimians. 



The Suborders in the Order of Primates 



At present the order of primates is arranged in three suborders: (i) 

 Lemuroidea, (2) Tarsioidea and (3) Anthropoidea. The first of these includes 

 all of the prosimian forms of the lemur kind, while the third comprises all 

 families of actual simians and man. According to this arrangement the 

 tarsiers occupy an intermediate position between the other two suborders. 



The following are the accepted families of these three suborders: 



Suborder Lemuroidea: Suborder Anthropoidea: 



Daubentonidae Hapalidae 



Nycticebidae Cebidae 



c T J -r • -J Lasiopvgidae 



buborder larsioidea: ''° 



T. ••I Hylobatidae 



1 arsiidae -^ 



Simiidae 

 Hominidae 



In this discussion a slight rearrangement has been made to serve the 

 purposes of presentation and at the same time to observe the dictates imposed 

 by certain morphological similarities in the brain. Accordingly, the primates 

 are here considered in four distinct divisions: First, the lower priinates which 

 comprise the lemurs, tarsiers and all of the new-world monkeys (including 



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