212 Experimental Zoology 
The Average Contribution of Each Several Ancestor to the Total 
Heritage of the Offspring. Proc. Roy. Soc. London, LXI. 1897. 
Pearson, K. Contributions to the Mathematical Theory of Evolution. 
[I. On the Dissection of Frequency Curves.] Phil. Trans. Roy. Soc. 
London, CLXXXV._ 1894. 
Contributions to the Mathematical Theory of Evolution, II. Skew 
Variation in Homogeneous Material. Phil. Trans. Roy. Soc. Lon- 
don, CLXXXVI. 1895. ; 
Mathematical Contributions to the Theory of Evolution, ITI. Regres- 
sion, Heredity, and Panmixia. Phil. Trans. Roy. Soc. London, 
CLXXXVII._ 1896. 
Mathematical Contributions to the Theory of Evolution. Ona Form 
of Spurious Correlation, which may arise when Indices are used 
in the Measurement of Organs. Proc. Roy. Soc. London, LX. 
1897. 
Wathenatical Contributions to the Theory of Evolution. On the Law 
of Ancestral Heredity. Proc. Roy. Soc. London, LXII. 1898. 
The Chances of Death, and Other Studies in Evolution. 2 vols. 
London. 1897. 
The Grammar of Science, 2d ed. 1900. 
Pearson, K, and Fiton, L. Mathematical Contributions to the Theory of 
Evolution, IV. On the Probable Errors of Frequency Constants 
and on the Influence of Random Selection on Variation and Corre- 
lation. Phil. Trans. Roy. Soc. London, CXCI. 1808. 
SHULL, G.H. Galtonian Regression in the ‘‘Pure Line.” Torreya, Vol. 5, 
No. 2. 1905. 
Tuompson, H. On Correlations of Certain External Parts of Palemon 
Serratus. Proc. Roy. Soc. London, LV. 1894. 
Varicny, H. pe. Experimental Evolution. 1892. 
DE Vries. Ueber halbe Galton-Kurven als Zeichnen diskontinuirlichen 
Variation. Ber. deutsch. Bot. Ges. XII. 1894. 
Eine zweigipfelige Variations-Kurve. Arch. f. Entw.-Mech. II. 
1895. 
Warren, E. Variation in Portunusdepurator. Proc. Roy. Soc. London, 
LX. 1896. 
An Investigation on the Variability of the Human Skeleton with Espe- 
cial Reference to the Naquada Race. Phil. Trans. Roy. Soc. Lon- 
don, CLXXXIX. 1897. 
WELLDON, W. The Variations occurring in Certain Decapod Crustacea, I. 
Crangon vulgaris. Proc. Roy. Soc. London, XLVII. 18g. 
Certain Correlated Variations in Crangon vulgaris. Proc. Roy. Soc. 
London, LI. 1892. 
On Certain Correlated Variations in Carcinus manas. Proc. Roy. 
Soc. London, LIV. 1893. 
Report of the Committee for Conducting Statistical Inquiries into the 
Measurable Characteristics of Plants and Animals. Part I: An 
Attempt to Measure the Death-rate due to Selective Destruction of 
Carcinus mznas with Respect to a Particular Dimension. Proc. 
Roy. Soc. London, LVII. 1895. 
