Rhesxu monkey 



Order 11 Sirenia ("siren"). Aquatic mammals with flippers. Ex- 

 amples, sea-cow, manatee, dugong. 



Order 12 Cetacea ("whale"). Aquatic mammals with flippers. 



Whalebone, or baleen, whale family. Whalebone whales, right 

 whales, gray whales, humpback whales, rorquals. 



T oothed- whale family . Sperm whales, beaked whales, killer whales, 

 white whales, narwhals, dolphins, porpoises. 



Order 13 Primates ("first"). The leading order of animals, including 

 man; flat nails at ends of digits, usually five on both hands and feet; 

 thumb and great toe usually opposable. 



Suborder Lemuroids ("lemur-like"). Small furry animals; some 

 digits have nails, other claws; doglike snout. Aye-aye family, tarsier 

 family, lemur family. 



Suborder Anthropoids ("man-like"). Nails on all digits with excep- 

 tion of the marmosets, which resemble man in face only. 



Marmoset family. 



New World monkeys. Nearly all have long grasping tails and flat 

 noses; thumb not opposable except in capuchin monkey. Ex- 

 amples, howling monkeys, squirrel monkeys, spider monkeys, 

 capuchin monkeys, owl monkeys, titis monkeys, woolly 

 monkeys. 



Old World monkeys. Tail not grasping; narrow nose with nostrils 

 pointed downward; bony external ear; thumb opposable. 

 Examples, baboons, mandrills, macaques. 



Simians (apes). Large, no distinct tail, thumb opposable, narrow 

 nose, bony external ear, arms longer than legs; have an appendix. 



Gibbons. Long arms and legs; smallest of apes. 

 Orangutans. Long arms, small flat ears. 

 Chimpanzees. Large ears, short stout body, intelligent. 

 Gorillas. Small ears, largest of apes. 

 Humans. The human race (see illustrations, pp. 47, 52 and 517). 



Howler 



699 



