INDEX. 



(Names of animals are to be looked for under their class name.) 



Amphibia, variability 66 



Amphipoda, see Crustacea 67 



Ancestral heredity 7g 



Annelida, correlation 75 



, variability ... 67 



Aphidae, see Hexapoda 66 



Area, measurement of 5 



Arithmetical work, precautions in g 



Arithometer 7 



Assortative mating 75 



Average 13, 17 



deviation. m 16 



Aves, correlation ' 77 



, variability 65 



of eggs 65 



Bimodal frequency polygons 73 



Birds, see Aves. 



Brachiqpoda, variability 67 



Brunsviga calculator. 8 



Bryophyta, variability 71 



Bryozoa, correlation 77 



, heredity 80 



, variability 67 



Calculating machines 7 



tables 7 



Caprifoliaceae, variability 70 



Caryophyllacese, variability 67 



Character denned 1 



Chauvenet 's criterion 12 



Class, denned 



range 



Closeness of fit 2 



Coefficient of correlation. . .. 4 



regression 47 



variability 16, 63 



Crelenterata, see Hydromedusa. 



Color, measurement of _' 



Compositae, correlation 'i 



, variability 69, 70 



Comptometer ~ 



Coordinate paper. J* 



Cornaceae, variability JJ 



Correlated variability *j 



Counting, methods of ; 



Crabs f 



Criminals, skull index 



Critical function z \ 



Cruciferse, variability 



223 



