[miLLs] PSYCHIC DEVELOPMENT OF YOUNG AMIMALS 233 
It uses the paws fairly well to get rid of anything, e.g., a feather put 
against the mouth, 
It is easy enough now to make out the colour of the various mem- 
bers of the litter. 
The ears are held back and down only as yet, still there is an approach 
to the position of the ears at times of old rabbits. 
When irritating substances are put before the nose the ears are 
moved, probably reflexly. 
They are still both blind and deaf. 
9th day.— Twitching, as in the case of puppies and kittens, is noticed 
during sleep. 
10th day.—The eyes of some of the litter are now open. 
When I produce a short, sharp sound by a dog whistle, taking care 
that they do not feel the blast of air, they move, turn the head to one 
side and also move the ears. The effect is less pronounced after two or 
three trials (exhaustion) though very marked at first. 
Can get no clear evidence of vision nor any eye reflexes, such as 
winking. 
There is such a tendency to jump about that one almost leaped from 
my hands, though the source of the stimulus was not obvious. 
11th day.—The eyes of some are not yet open. 
13th day.— A great advance in growth is to be observed within a 
very few days. 
When one touches the nose or other parts of the head they almost 
jump out of the nest, reminding me of an animal reacting to a stimulus 
when under the influence of strychnine. 
Very decided advance made in the position of the ears—they are 
more upright and are moved more readily. 
Can get no evidence of vision, 
Can get no reflex from the eyes till the cornea is touched, and not 
very good then. 
About the hearing there can be no doubt whatever. 
14th day. —The ear carriage is still better. Lye reflexes feebly present. 
They are found out of the nest and go to the mother to suck when 
distant from her two or three inches. 
15th day.—Since they strike against the side of the nest (board) Iam 
satisfied there is no distinct vision. 
They are able to reach the mother when three or four inches distant. 
They seem to smell fresh, green food placed in the larger box with 
which their nest communicates. 
They do not seem to start quite so much when touched as they did. 
The rapidity of general growth, and especially of the hair, is impressive. 
There is an obvious advance in smell and taste. 
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