84 STATISTICAL METHODS. 



Number of fin-rays of Pleuronectes flesus from Western 

 Baltic, Af'=39, southern North Sea 41, Plymouth 44, 

 Duncker, '99. 



Fish in similar and adjacent lakes belonging to different 

 drainage-basins have marked difference in scales on nape, 

 number of fin-rays and of dorsal spines, Moenkhaus, '96. 



Invertebrata. Mean and variability of deep- and shallow- 

 water Eupagurus differ, Schuster, '03; proportions, variability, 

 and correlation coefficients of Pecten opercularis differ at 

 Eddy stone, Irish Sea, and Firth of Forth, Davenport, '03 b . 

 Plants. Lesser celandine, Pearson and others, '03. 



USEFUL TABLES. 



Probability Integral. Area and ordinate of normal curve 

 in terms of abscissa, Sheppard, '98, '03; abscissa of normal 

 curve in terms of ordinate, Sheppard, '93; abscissa and ordi- 

 nate in terms of difference of area, Sheppard, '03; abscissa 

 of normal curve in terms of class index, Sheppard, '98. 



Probability of fitted curve being the true one: 



Elderton, '02. 



Values of log ] ^i/ e~^ 2 [ for various values of f. 



Elderton, '02. 



Table of log . - ^ -. - . Elderton, '02. 



& n(n 2)(n 4) . . . 



/2 7*00 i o 



Table of A/ I e ~ * x d%, for different values of 7, Elder- 



ton, '02. 



Table of Iog 10 (l+x) x log, e for various values of x, for 

 use with curves of Type III. 



Tables for calculating probable error, Sheppard, 7 98. 



Table of values of 1 r 2 and \/l r 2 for all values of r 

 from to 1 proceeding by hundredths, Yule, '97. 

 Probable errors of r for all values of n, Yule, '97. 



