STATISTICAL BIOLOGICAL STUDY. 73 



Index of Littorina, Casco Bay (Bumpus '98) + . 13 



Index of Littorina Newport (Bumpus. '98). + .25 



Humber " " + .048 



So. Kincardineshire (Bumpus '98) + .068 



21-rayed Chrysanthemum (de Vries, '99) . 13 



13- " " " " " .+ .12 



Selected 12- (and 13-) rayed Chrysanthemum (de Vries, '99) +1.9 



Rays of Pectenirradians, fossil, Va oldest (Davenport, 'Ol b ) .22 



" '* youngest . 16 



" " " " recent, N C -.09 



44 4t " " recent, L.I + .023 



Length of wings of long-winged chinch-bug (Davenport, '01*>). . . .43 

 44 " " " short-winged chinch-bug " ...+ .44 



Length horns rhinoceros-beetle, long-horned (Davenport, 'Ol b ). . .03 

 44 " " '* short-horned 4 * .. + .48 



Complex Distributions. 



Bimodal Polygons. Discontinuity in hairiness of Biscu- 

 tella, Saunders, '97; of Lychnis, Bateson and Saunders, '02, 

 Weldon, '02 C . 



Length of cephalic horns of rhinoceros-beetle, and forceps 

 length of male earwigs, Bateson, '94; explanation of di- 

 morphism, Giard, '94. 



Multimodal Polygons. Modes fall in Fibonacci series, Lud- 

 wig, '96, '96 b , '96 C , '97, '97 b , '97 C 



Modes of Chrysanthemum segetum at 13, 21, de Vries, '95. 



Opposed to Fibonacci series, complex polygon due to lack 

 of homogeneity, Lucas, '98, Shull, '02, Pearson, '02**, Lee, '02, 

 Reinohl, '03, Vogler, '03. 



CORRELATION. 



General and Method. Galton, '88, '89, Pearson, 

 '96, Yule, '97, '97 b ; spurious correlation, Pearson,'97; non- 

 quantitative characters, Pearson, '00 C , Pearson and Lee, '00, 

 Yule, '00, '00 b , '02; index not constant in related races, 

 Weldon, '92, Pearson, '96, '98 b p. 175, '02 n p. 2, Daven- 

 port, '03 b . 

 Man. 



General. Galton, '88; British criminals, various dimen- 

 sions, r=.13 to .84, Macdonell, '02. 



Skull. Correlated with cranial capacity in living persons, 

 Lee and Pearson, '01 ; breadth and length, Naquada, Bavari- 

 ans, French, Pearson, '96, p. 2SO; N. A. Indians, Boas, '99; 



