Smithsonian Report, 1941. — Walker 



PLATE 1 1 



1. Three gaboon vipers in glass-fronted eage in rejitile house, National Zoological Park, 

 iranu'diatel.v beyond the snake clo.sest to the glass in front. 



A small i)ool is 



2. American alligators in glass-fronted room in reptile house, National Zoological Park. A skylight com- 

 prises almost the entire roof. Both iilants and alligators thrive in the temperatures of 80° to 100°, and 

 the high humidity that prevails in this enclosure. 



I 



