facts, see pertinent 



fatness (frequently expressed in 

 Russian literature as ratio be- 

 tween the weight of liver to the 

 total weight of body) 



fecal masses 



feces 



feciuidity 



feeding ground 



feeding ground area 

 feeding habits 



feeding waters 



feigning death (by whales) 



fertility 



fertilization 



fertilizer 



field estimate 



field work, see also under 



rapid 

 filtering apparatus (in animals) 

 finback whale, Balaenoptera 



physalu s 

 Fish and Wildlife Service 



(U. S. A.) 



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21 



