EVIDENCES OF A DIFFERENTIAL DEATH RATE, ETC. 163 
MENZIES, W. J. M. (1916.) Salmon of the east coast of Sutherland. Fish. 
Bd. Scotl., Salmon Fisheries 1915, No. II. (pp. 27.) 
(1921.) Notes on the salmon of Thurso Bay, May-September, 
1920. Ibid., 1920, II, pp. 13-23. 
NEWSHOLME, A. (1899) The Elements of Vital Statistics. III. Ed. 
London. 
PEARSON, K. (1897.) The Chances of Death. Vol. I. London and New 
York. 
PETERSEN, C. G. JOH., W. GARSTANG, & H. M. KYLE (1907.) Summary-Re- 
port on the present state of our knowledge with regard to the 
plaice and plaice fisheries. Cons. perm. Internat. pour |’Ex- 
ploration de la Mer, Rapp. et Proc. verb. des Reun. 7:54-150. 
PUNNETT, R. C. (1904.) Merism and sex in “Spinax niger.” Biometrika 
3:313-362. 
Pe SE (1904a.) Note on the proportions of the sexes in “Carcinus 
menas.” Proc. Cambridge Phil. Soc., 12: 293-296. 
RAU, PHIL & NELLIE (1914.) Longevity in Saturniid moths and its rela- 
tion to the function of reproduction. Trans. Acad. Sci. Saint 
Louis, 23 :1-78. 
WALLACE, W. (1907.) Report on the age and growth-rate of the plaice 
in the south North Sea, as determined by the investigation of 
otoliths. Rept. North Sea Fish. Inv., 1904-5, Part I, pp. 1-47. 
feck is CS (1914.) Report on the age, growth, and sexual maturity of the 
plaice in certain parts of the North Sea. Board Agr. & Fish., 
(Engl.) Fishery Investigations, Ser. II, Sea Fisheries. Vol. IH, 
No. 2. (pp. 79:) 
WEBB, A. D. (1911.) The New Dictionary of Statistics. London. 
WHIPPLE, G. C. (1919.) Vital Statistics. New York. 
YULE, G. UDNY (1911.) An Introduction to the Study of Statistics. 
London. 
