CLASS MAMMALIA 



663 



in size; they are covered with 

 fur, and usually possess a long 

 tail (Fig. 528). The face is 

 elongated ; the brain case is 

 relatively small, and the hind 

 limbs are always longer than 

 the fore limbs. The fifty liv- 

 ing species are mostly confined 

 to Madagascar and neighbor- 

 ing islands ; the rest inhabit 

 Africa and the Oriental region. 

 Lemurs are mostly nocturnal. 

 They feed on fruit and various 

 other substances, and are all 

 arboreal. 



The marmosets (HAPALID^:, 

 Fig. 529), are small arboreal 

 primates ranging from Central 

 toe has a flat nail, but the other 



FIG. 529. The golden marmoset, 

 Midas chrysoleucas. (From Flower 

 and Lydekker.) 



FIG. 528. The ring-tailed lemur, 

 Lemur catla. (Frum Flower and 

 Lydekker.) 



America to Brazil. The great 

 digits bear claws; the tail and 

 ears are long; the brain case is 

 large; the thumb is not op- 

 posable, and there is a wide 

 space between the nostril open- 

 ings. They feed upon fruit 

 and insects, and produce three 

 young at a birth. 



The South American mon- 

 keys (CEBID^E) are arboreal and 

 of small or medium size ; the 

 thumb, as well as the great toe, 

 is opposable; all the digits pos- 

 sess nails ; the tail is usually 

 long and prehensile, aiding in 

 climbing ; the space between 

 the nostril openings is wide ; 



