68 



ELIZABETH LOCKWOOD THOMPSON 



No. of 

 days 

 tested 



35 



Totals . 



36 



Totals . 



37 



Totals . 



38 



TABLE Xl— {Continued) 



Snail No. 9— {Continued) 



No. of No. of 



trial trial No. of 



for for correct 



series day choices 



193 

 194 

 195 

 196 

 197 

 198 



199 

 200 

 201 

 202 

 203 



204 

 205 

 206 

 207 

 208 

 209 

 210 



Totals . 



211 

 212 

 213 

 214 

 215 



1 



la 



lb 



2 



2a 



2b 



6 



1 



la 



lb 



Ic 



Id 



5 



1 



la 



lb 



Ic 



Id 



le 



2 



7 



1 



2 



2a 



2b 



2c 



5 



(33%) 





 

 

 



1 



1 (20%) 



(14%) 



(40%) 



No. of 



incorrect 



choices 



(66%: 



(80%) 



(85%) 



(60%) 



No. of 



\ days 



tested 



Summary — Snail No. 9 



1 



2 



3 



4 



*5 



*6 



7 



8 



9 



10 



11 



12 



13 



No. of 

 trials 



Correct 

 choices 



1 

 

 3 

 1 

 1 

 1 

 3 

 3 

 4 

 2 

 

 3 

 3 



Incorrect 

 choices 



2 

 1 

 

 4 

 4 

 3 

 4 

 3 

 3 

 

 5 

 5 

 



* Indicates that an egg mass had been deposited by the snail during the 24 hours 

 immediately preceding the tests on the day marked. 



