152 CALVIN P. STONE 



c. Elimination of visual, olfactory, gustatory sense organs 

 and the vibrissae prior to sexual experience produces no changes 

 in the sexual act, either in the pattern, the age at which it appears, 

 or the responsiveness to stimulation of a female in heat. Substi- 

 tute action of the visual, olfactory, or gustatory senses is, there- 

 fore, improbable. 



d. Partial elimination of auditory sensitivity in blind and 

 anosmic rats after sexual experience makes no change in the 

 ease or arousing the pairing impulse. Experiments of this evi- 

 dence that audition is an essential receptor for the initiation of 

 the copulatory act in the rat. 



e. The lack of evidence for any important function of each 

 of the other primary senses in the initiation of the copulatory 

 act points to cutaneous and receptors of deep sensibility as the 

 primary organs that mediates the exteroceptive stimuli by which 

 the act is initiated. 



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