[MILLS] PSYCHIC DEVELOPMENT OF YOUNG ANIMALS 287 
They licked at the salt once but did not repeat this, but went again 
and again to the sugar or remained by it. They did not remain near the 
other substances. They were not kept long in this box. 
A leaf of lettuce was just after placed before them. They seemed to 
like to be near it and very soon began to nibble at it. 
They wipe the face with the paws much like a mature cavy. 
Of the three constituting the litter one was from the first much larger. 
The larger one was observed to get from its nest to the box. a dis- 
tance of two inches, when not more than three and a half hours old. 
2nd day.—At 1.30 p.m, one of the cavies was put into the box occupied 
by a rabbit. It did not approach or attempt to suck it. I am satisfied 
it recognized the creature as “strange.” 
It eats sugar from my finger and follows the finger by sight I 
think. 
The eye must be almost touched before the winking inflex is produced. 
3rd day.—Nibbling at green food. 
4th day.— Eating green food. 
7th day.—Eating food, oats and stale bread, and they seem, in most 
respects, to act like old cavies. 
Sth day.—One is taken to my laboratory for the purpose of brain 
study. On the way it squeaks a good deal. 
They eat well, but follow up the mother at times to suck. 
10th day.—They now eat as fast and well as mature animals, and in 
nearly all essential respects resemble them. | 
There seemed to be little more to record though they were kept to 
maturity. Other litters were also studied with the same result, 
REMARKS ON THE DIARY OF THE RABBIT. 
By a comparison of the records for the common and the pure-bred 
rabbits, it might appear that the latter were in some respects in advance 
of the former; but this is apparent rather than real I think, as in the 
common rabbit, observations were probably not made quite early enough 
in some instances 
The marked development of tactile sensibility at so early an age in 
the rabbit is very noteworthy. The creature also responds unusually well 
as compared with other animals, as the dog and cat, to pain-produciny 
stimuli. 
While there is the same uncertainty as to taste and smell at birth and 
for a day or two, upon the whole the evidence is in favour of the rabbit 
being in advance somewhat of the dog and the cat in these respects, 
The total absence of voice in the young is in harmony with the 
sparing production of sounds by the adult. 
The movements of the ears, while more marked, are more akin to 
those of the dog than of the cat. 
