STATISTICAL BIOLOGICAL STUDY. 65 



Various cranial dimensions, Lee and Pearson, '01. 



Other Organs. Coefficient of variability of bones of skele- 

 ton of French and Naquada (C. of limb-bones, 4.53-5.57), 

 Warren, '97; appendicular skeleton, Pearson, '96; finger- 

 bones, Lewenz and Whiteley, '02; seriation of position of 

 spinal nerves, Bardeen and Elting, '01; various organs in 

 diverse races, Brewster, '97, '99. 

 Mammalia. 



Relative variability of specific and generic characters in 

 various mammals the former being greater, Brewster, '97; 

 seriation of number of Miillerian glands in Sus scrofa, n, 2000; 

 A, 3.501 .025; a, 1.6SO.018; C, 48.0, Davenport and Bui- 

 lard, '96. 

 Aves. 



Seriations of various proportions of N. A. birds, Allen, '71; 

 characters of Lanius ("shrike") and its races, Strong, '01; 



Lot. n A a C 



Shrike, length L. wing $ 168 99.06mm. 2.74mm. 281 



' ? 112 97.98 2.64 2*69 



tail length 4 141 101.57 3.48 343 



? 95 99 55 3.63 3.65 



bill length, $ 164 12.01 0.71 589 



" " ? 112 11.71 0.63 5^35 



" depth, a 126 9.27 0.42 457 



? 85 8.95 0.41 4.61 



melanism of crown, $ 144 83.57% 3.0% 358 



? 99 83.66 3.19 3.81 



'" upper tail-coverts i 142 53.13 15.42 2902 



1 ? 104 47.98 18.99 39^58 



Curvature of cuimen 29.94 2.74 9. 15 



Eggs, proportions: Passer domesticus, Bumpus, '97, Pear- 

 son, '02 e ; various species, Latter, '02. 



Av. 



Length, Length, mm. Breadth, mm. 



Species. Bird, n A a C A a C 



