THE PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 203 
movement of an object before the eyes at the distance 
of a 4 inch. 
On the 13th day the pupils respond to light. 
On the 14th day a small object is followed by the 
eyes. 
The 16th day was memorable, as on that day was 
noticed the first licking of the paw, the first act of 
scratching, and the first play. 
On the 18th day the nose, uncoloured at birth, began 
to pigment. 
The 21st day furnishes evidences of recognition by 
the kitten of its box as its home, for, after being out, it 
returns to it and climbs in. 
Attention is directed to the various stages of 
development of muscular co-ordination, as illustrated 
by the kitten’s toilet-making, play, getting in and out 
of its box, and from one object to another in the room, 
and which can be followed from the somewhat full 
records of facts bearing on this subject. The records of 
certain days are clear on this point, eg. 16th, 18th, 
21st, 23rd, 28th, 29th, 30th, 32nd, 33rd, 37th, 51st. 
The behaviour of the kitten towards the same dog at 
different times, and as compared with the second dog, 
seems to me to indicate an interesting struggle between 
instinct and other qualities, and shows how the result, 
in any one case, depends on past experience, the stage 
of development, and much more that each reader will 
put into the case, according to his own views of 
physiology and psychology.* 
* Mr T. Mann Jones’ remarks on this subject will be read with 
interest: ‘‘You deal with the notion of hereditary (psychical) 
memory and aversions more gently than I should. As early as a boy 
I had come to the conclusion, from experiments, that if I allowed 
hereditary memory of dogs to kittens, 1 must also allow they had 
hereditary memory of a chemical laboratory ; and later, my experiments 
on fowls convinced me if I admitted memory (psychic) of the hawk’s 
ery, I must also admit similar memory of the report of a gun and the 
