Chap. 37 



MAMMALS AND MANKIND 



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Fig. 37.5. Upper, duckbill (Ornithorhynchus). A semi-aquatic egg-laying mam- 

 mal, about the size of a large cat, that lives only in Eastern Australia. Lower, five- 

 toed echidna or spiny anteater, also an egg layer. As adults neither duckbills nor 

 echidnas have true teeth; the duckbill lives on worms and small moUusks; the 

 echidna has a long beak with which it captures ants. During the period of rearing 

 young a fold of skin forms a pouch in which the one or two eggs are incubated. 

 After hatching, the young ones enter the pouch and from certain areas of the skin 

 lick the milk secreted by the milk glands which are specialized sweat glands. (Cour- 

 tesy, Australian News and Information Service, New York.) 



