Smithsonian Report. 1954. — Matthews 



Plate 1 





M^W^" 



Upper, a long-eared bat marked with a numbered aluniiiunn ring. ])i-\(iii "i ,:i\ i.nirn" lia\-e 

 ringed over 1,800 bats belonging to seven species. (Photograph by J. 11. D. Hooper.) 

 Center and lower, photographs of lemmings, taken by Frances Pitt in Norwa\'. The 

 lower animal is an adult; the one in the center is somewhat more than 'half grown. 



