OLFACTORY REACTIONS IN AMPHIBIANS 



637 



The latter were more responsive to the optic stimulations. The 

 toads with the olfactory tract cut preferred to lie quietly in the 

 sand. The feeding reactions were not inhibited by either 

 operation. 



Some toads collected in the late summer of 1912, tested simi- 

 larly, gave evidence coinciding with the data of the previous 

 tests. 



The results of these experiments show that odors stimulate 

 the olfactory receptors, whereby certain motor activities of 

 unquestionable value to the animals are called forth. 



