3 i8 ECONOMIC ZOOLOGY AND ENTOMOLOGY 



five years. Thus under present regulations no seals may be, 

 killed except the few that are allowed the natives for food. 



The California sea-lion, Zalophus calif ornianus, and S teller's 

 sea-lion, Eumetopias stelleri, are both found along the rocky 

 shores of the north Pacific. Their hair is coarse* and of little 

 value for fur, but the skins are used for many purposes. 



The Pacific walrus, Odobenus obesus, is the most important 

 species of the walrus family, Odobenidce. These animals attain 

 a length of ten to twelve feet and a weight of 1500 to 2000 

 pounds. The canine teeth are developed into two huge valu- 

 able ivory tusks sometimes as much as two feet long. They 

 feed principally on shell fish and crustaceans which they dig up 

 from the bottom of the shallow bays. These huge clumsy 

 animals, now comparatively few in numbers, were formerly 

 abundant, and furnished the natives of the northern shores 

 food, fuel, oils and excellent skins which were used in build- 

 ing houses, boats, dog harness, etc. 



The order Primates is the highest order of animals, and in- 

 cludes the lemurs, monkeys, baboons, apes and man. The 

 lemurs, family Lemuroidea, are the lowest members of the 

 group. These are strange, squirrel-like or fox-like little ani- 

 mals living in the trees and bushes in Madagascar and other 

 near-by regions. The marmosets, family Callithricida, are 

 curious small long-haired, long-tailed animals, but little higher 

 in the scale than lemurs. They are found in tropical America. 

 The New World monkeys, family Cebida, are mostly smaller 

 and weaker than the Old World forms. Nearly all have long 

 prehensile tails which greatly aid them in their travels in the 

 tree tops. They all have a wide nose in which the nostrils are 

 separated by a broad septum and the openings directed 

 laterally. On this account they are known as platyrrhine 

 monkeys, while the Old World monkeys, which have the nose 

 septum narrow and the openings of the nostrils directed for- 

 ward, are called catarrhine monkeys. 



The family Cercopithecida includes monkeys of Japan, 

 Asia, Africa and the Malay Archipelago. None of these has 

 a prehensile tail and some have only a very short tail. The 

 red-faced monkey of Japan is one of the best known of these. 



