MAMMALIA 



349 



a 



Fig. 182. — Group of Monotremata. A, Proechidna hrwijnii; B, Proechidna 

 nigroaculeata; C, Echidna aculeata; ventral aspect to show brood pouch; D, 

 Echdwia acnleata; E, Omithorynchus anatinus; F, Omithorhynchus standing up 

 like a penguin; G, Omithorhynchus female allowing young to obtain milky 

 secretion from the diffuse abdominal mammary glands. (All redrawn, A, B, F, 

 G, after Brehm; C, after Haacke; D and E, after Vogt and Specht.) 



