CONTENTS 



{AU Rights reaerved) 



I. On thc Systciuatic Fitting of Curves to Observatioiis and Measurements. 



Part IL (With 8 Figures.) By Karl Pearson, F.R.S. . . . 1 



II. Quantitative Study of the Effect of Eiivironraeut upou the Fomis of 



Nassa obsoleta and Nussa trivittata from Cold Spring Harbor, Long 

 Island. (With 5 Figures.) By Abigail Camp Dimon ... 24 



III. On the Ambiguity of Mendels Categories. By W. F. R. Weldon, 



F.R.S 44 



IV. Cooperative Investigations on Plauts : I. On Inheritance in the Shü-ley 



Poppy 56 



Miscellanea. (i) Note on the Results of Cros-sing Japanese Waltzing 



Mice with European Albino Races. (With 4 Figures.) 



By A. D. Dakbishire 101 



(ii) Interpolation by Finite Differcnees. (Two Independent 



Variables.) By W. Palin Elderton .... 105 

 (iii) Variation in. the Möscatel {Adoxa Moschatellina, L.) 



(With .3 Figures.) By Henry Whitehead . 108 



(iv) Seasonal Change in the Characters of Aster prenantlundes 



(Muhl). Note ou a paper by G. H. SriULL . . 113 



V. On the Number and Aa-rangemeut of the Bony Plates of the Young 



John Dory. By L. W. Byrne. (With one Figure and Plate I.) . 115 



The Editors wish to acknowledge the receipt of contributions from W. R. 

 Macdonell, Norman Blanchard, Alice Lee, Frank Lutz, L. Doxcaster and 

 E. H. J. Schuster, and E. IJ. J. Schuster. 



Biometrika will appear about four times a year, A volutne containing 

 about 400 pages, with plates and tables, will be issued annually. 



Papers for publication should be sent to Professor W. F. R. Weldon, 

 Merton Lea, Oxford, to Professor Karl Pearson, 7, Well Road, Hampstead, 

 London, or to Professor C. B. Dav^nport, University of Chicago, Illinois, U.S. 

 It is very desirablc that a copy of all measurements made, not uecessarily 

 for publication, should accompany each paper. In all cases the papers themselves 

 should contain not only the calculated constants, but the distributions from 

 which they have been deduced. 



Papers will be accepted in German, French or Italian. In the firat 

 case the manuscript should be in Roman not German characters. 



Contributors receive 25 copies of their papers free. Fifty additional copiea 

 may be had at cost price, about 6/- per sheet of eight pages: tl^se should 

 be ordered when the final proof is returned. 



All Communications, other than those relating to contributions, should 

 be addressed to the University Press, Cambridge. 



The subscription price, payable in advance, is 30s. net per volume (post free); 

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