The above series of tests was given under the same external conditions in a dark-room to six pairs of dancers. In all cases, two individuals, a male and a female, which had been kept in the same cage, were experimented with at the same time, _i.e._ one was permitted to rest in the nest-box while the other was being put through a test. This was done in order that the comparison of the results for males and females should be perfectly fair. The detailed results of this long series of tests may be presented for only two individuals, Nos. 210 and 215, Table 33. In this table lines separate the results of the seven different kinds of tests. TABLE 33 THE ROLE OF SIGHT, TOUCH, AND SMELL IN LABYRINTH EXPERIMENTS No. 210 No. 215 TEST CONDITION ERRORS CONDITION ERRORS I. 1 No shock 9 I. No shock 2 II. 2 Shock 5 II. Shock 3 3 Shock 4 Shock 1 4 Shock 2 Shock 0 5 Shock 3 Shock 0 6 Shock 0 Shock 0 7 Shock 0 Shock 0 8 Shock 0 Shock 0 9 Shock 0 III. Labyrinth 0 moved 10 Shock 0 IV. Paper on floor 4 III. 11 Labyrinth 0 No paper (shock) 0 moved IV. 12 Paper on 0 0 floor 13 No paper 0 No paper 0 (shock) 14 Paper 1 Paper 1 15 No paper 0 No paper 0 16 Paper 7 Paper 4 17 No paper 0 No paper 0 18 Paper 0 Paper 0 19 No paper 0 No paper 0 20 Paper 4 Paper 0 21 No paper 0 No paper 0 22 Paper 2 V. Darkness 0 23 No paper 2 VI. Labyrinth 2 24 Paper 1 washed 0 25 No paper 0 VII. Darkness 2 26 Paper 0 27 No paper 0 28 Paper 0 29 No paper 0 V. 30 Darkness 0 VI. 31 Labyrinth 2 washed 32 0 VII. 33 Darkness 0