xxii INTRODUCTION 



and tailless bodies. Arctocebus succeeds with its reflexed finger, wide 

 spreading thumb and rudimentary tail, to be followed by Perodicticus 

 whose tail is about one third the length of the body and having long 

 slender processes from the anterior dorsal vertebrae projecting through 

 the skin. The Subfamily Galagin^e follows with its genera Galago 

 with three subgenera and thirty species, having the curious power of 

 folding the ears at will ; and Hemigalago. Next comes the Subfamily 

 Lemuriisle containing the true Lemurs and their near allies. It has 

 seven genera, with, altogether, thirty-five species. The members of the 

 seven genera present many characteristic differences from each other, 

 in size, coloration, and peculiarities of crania. The members of one 

 genus, Chirogale, afford a transition between Galago and Lemur. 

 This genus and Microcebus have been considered by some Authors 

 as not divisible, and while their members bear a resemblance to each 

 other, yet they each exhibit sufficient characters to make it advisable 

 to keep them in different genera. They are small animals, some of 

 them the most minute of the Lemuroidea. The last Subfamily of this 

 Suborder is Indrisijsle containing the largest member of the Lemur- 

 oidea yet known. The adults have thirty teeth, and the toes, except the 

 hallux, are united to the end of the first phalanx by a fold of skin. 

 The Subfamily has but three genera, Indris with one species, the 

 largest of all the Lemurs, distinguished by absence of tail and excessive 

 variability in the color of pelage; Propithecus with two species and 

 five subspecies. Like Indris the species of this genus are subject to 

 much variation in color, and this has been productive of great con- 

 fusion in discriminating between the different forms. They are large 

 animals, with powerful hind limbs enabling them to leap amazing dis- 

 tances. When walking on the ground they assume an erect posture 

 and, like the Gibbons, balance themselves by holding the arms over 

 their heads. The last genus is Lichanotus with one species. It is 

 a small animal with a rather long tail, and woolly fur. It is slow in 

 its movements but when on the ground like the other members of 

 Indrisin^e it walks upright. 



The second Suborder ANTHROPOIDEA contains the remainder 

 of the Primates, including Man. As the consideration of Homo is 

 excluded in this Review, we pass to the Monkeys, Baboons, Apes, etc., 

 which compose the rest of the Suborder. The Monkeys of the New 

 World and those of the Old, save in one Family, Callitrichuxe, are 

 separated by two characters, the number of teeth, and more or less 

 prehensile tails. They are all contained in two Families, the one just 

 mentioned above, and Cebwm. The first contains the smaller, less 



