SEXUAL BEHAVIOR OF ALBINO RAT 137 



clasping and with no palpation. Probably not sexually ex- 

 cited. Tested at age of seventy-six days. No copulation in 

 first period of eight minutes or second of six minutes, but copu- 

 lation appeared in two seconds after female's entrance in the 

 third period. Record for one half hour was thirty copulations. 

 Autopsy showed complete destruction of bulbs. 



Rat 25. Operated at age of thirty days. Operation did not 

 destroy sense of smell. A few days after the operation smelling 

 was renewed. Second operation at age of sixty days. Before 

 the wound had entirely healed a slight scalp infection was noticed 

 which infected the meninges at the point of operation and prob- 

 ably a part of the frontal pole. This caused arrest of growth 

 for approximately two and one-half weeks. Recovery was very 

 slow. 



Tested for copulation at age of seventy-six days for peri- 

 ods of eight minutes, six minutes. No mounting or signs of 

 excitement. 



Tested at age of eighty- two days for periods of six minutes, 

 five minutes, six minutes, six minutes. Placed fore feet on 

 female's back and bit at her head short tune, but was idle after 

 three minutes. No mounting or signs of excitement during 

 first two periods. During third period he jumped on female and 

 clasped her firmly in true copulatory style, but did not palpate 

 or pistonate. Tested at age of eighty-eight days for periods of 

 six minutes, eight minutes, eight minutes. No excitement 

 shown at any of the periods. Idle after first two minutes. 



Tested at age of ninety-four days; periods eight minutes, 

 eight minutes, eight minutes. (At this tune the testes were 

 small and flacid. The scrotum was pale.) No movements of a 

 sexual nature during the first period. During the second and 

 third repeated mounting and definite clasping without palpation 

 were seen. 



Tested at age of ninety-six days; periods eight minutes, eight 

 minutes. During the first period male mounted and clasped 

 several times but did not palpate. Female kicked him with her 

 hind foot and made him wary of her for a short tune. During 

 the second period he mounted and palpated and once made the 



