BEHAVIOR OF VERTEBRATES 445 



satisfactory fliers. The first birds, only eleven in all, arrived 

 at 2. 20 p. M. The rest returned the following morning (the 

 trip requires about five hours). Several other societies in the 

 region reported similar irregularities in return. On 22 July, 

 1906, several young pigeons had been released 65 km, from 

 their cote. These were well trained birds. They w^ould normally 

 require slightly less than one hour to make the trip. On 

 this date the birds first appearing required three hours, and 

 many did not return at all. 



Examination of the meteorological conditions of the two 

 days showed a violent magnetic storm on each, and great heat. 

 Thauzies maintains that the heat does not affect the birds. 

 He attributes their abnormal behavior to a disturbance of 

 their magnetic sensibility. 



IMITATION. 



Mammals. Witmer '" cites the act of a monkey (M. cyno- 

 molgus) in opening a door of a greenhouse as one involving 

 intelligent imitation. According to the author, the monkey 

 did not have to learn the act by trial and error, since she opened 

 it at the first attempt. This monkey learned also to open 

 the door of a cage, as well as the door leading into another 

 room, the knob of which she could reach through the bars of 

 the cage. " This door was partly of glass, and through it she 

 could look into the adjoining room. On one occasion I saw 

 her observe intently some people in this room who were about 

 to come into the room containing her cage. She reached through 

 the bars of the cage, turned the knob of the door, pushed the 

 door wide open, and sat waiting on her haunches with expectant 

 gaze. There could be no doubt that she had conceived in her 

 mind the entrance into the room of the persons whom she saw 

 in the adjoining room, and it looked as though she had opened 

 the door for the purpose of allowing them to enter." Witmer 

 cites other observations of the same type. 



This paper, as well as the one by the same author on " Peter," i^« 

 is a return to the worst type of anecdotalism. It is sincerely 

 hoped by the reviewer that the work appearing on animal 

 psychology from this laboratory, which apparently yields such 

 prodigious and interesting results with such a slight expenditure 

 of energy, will not be considered seriously until there is shown 



