Sai | 237 
The average deviation, or index of variability for the right is .9369, for 
the left, .94916. 
In the following table every possible combination of scales for the two 
. Sides is given with the actual number of specimens for each combination 
in one column, and the number according to the laws of probability in a 
parallel column: 
Sahu. Sg, See 
Scales. 8 = 23 Seales. a 2 25 Scales. re 2 25 
ae a2 Sa a2 2.5 =2 
Right.| Left. | S7@| 24 “Right, Left. | S| 2% || Right.| Left. | $42) 3A 
40 40 1 0 43 40 0 0 46 40 0 0 
40 41 0 0 43 41 3 46 41 0 1 
40 42 1 0 43 Re ak el ai | 46 42 0 3 
40 43 1 1 43 43) | a5giel) 3d 46 43 AP |i Yo 
40 44 0 1 43 “| 37 | 42 46 44 9 | 12 
40 45 0 1 43 45 | 13 | 23 46 45 9 i 
40 46 0 0 43 46 Ze le 0 46 gC br 18 3 
40 47 0 0 43 47 0 2 ‘|| 46 47 0 1 
40 48 0 0 43 48 0 1 46 48 2 0 
41 40 0 0 44 40 0 0 47 40 0 0 
41 41 2 0 44 41 1 2 47 41 0 0 
41 42 2 1 44 4 | 4 | 44 47 42 0 1 
41 43 2 2 44 eal yg jae © 47 43 0 3 
41 44 1 2 44 44 | 69 | 53 47 44 2 4 
41 45 0 1 44 4 | 31 | 28 47 45 2 2 
41 46 0 1 44 46 Nae 47 46 3 2 
41 a7 0 0 44 AT 1 3 47 47 3 0 
41 48 0 0 44 48 0 1 47 48 1 0 
42 40 0 0 45 40 0 0 48 40 0 0 
42 41 2 1 45 41 0 2 48 41 0 0 
42 42 | 10 3 45 42 Slee id 48 42 0 0 
42 43,0 45 43 | 92 | 33 48 43 0 1 
42 44 Orme 45 “4 | 4 | 41 48 4 0 1 
42 45 1 6 45 45 | 33 | 22 48 45 1 0 
42 46 0 2 45 46 | 17 | 10 48 46 1 0 
42 47 0 1 45 47 4 2 48 47 0 0 
42 48 0 0 45 48 1 1 48 48 Oa} nia 
