258 
Peckham—The Sense of Sight in Spiders. 
then she burrowed and worked over it for a long time before 
finding the door. 
July 26. She was forced out, and in twenty minutes found 
her own way back. 
July 27. Forced her out and to the other side of the box, 
but she at once returned and entered the nest. 
July 28. We took her out and substituted red paper for the 
pink, putting the pink around an artificial nest in another cor¬ 
ner. When she was dropped into the middle of the box she at 
once ran to the red paper and on to her nest. She was pushed 
away, and then ran over the pink paper, stopping to touch the 
cotton with her front legs, but quickly left it and returned to 
the red. She stood for some time on the paper and then 
crawled into the nest. We then removed the pink paper and 
the cottton. 
From this time up to August 4, the spider was forced out of 
her nest every day and found her way back across the red 
paper. 
August 5. The spider was taken from the box and yellow 
paper substituted for the red, the red paper being put around a 
false nest in the corner diagonally opposite. When put back 
she ran to an empty corner and stood there, looking back and 
forth from the red to the yellow, and from the yellow to the red, 
for twenty minutes, lifting her head high, and really seeming to 
study the situation intelligently. At last she started for the 
red paper; then looked back, turned and went nearly to the 
edge of the yellow; then turned and walked slowly toward the 
red—backed away—approached—turned away—came back, and 
then retreated to the empty corner. After fifteen minutes she 
walked on to the red paper and approached the cotton nest with 
her front legs raised in the attitude of defense; then she backed 
off to the edge of the paper, and then again approached, as if 
fearing an enemy. She then left the red paper, went to the 
yellow, and for ten minutes seemed to be trying to get into her 
nest, after which she went back to the unoccupied corner. After 
ten minutes she walked to the edge of the yellow paper and 
then to the edge of the red, and then went back to her cor- 
