INDEX. 



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



PAGE 



Amphibia, variability 66 



Amphipoda, see Crustacea 67 



Ancestral heredity 78 



Annelida, correlation 76 



, variability 67 



Aphidac, see Hexapoda 66 



Area, measurement of 5 



Arithmetical work, precautions in 8 



Arithometer 7 



Assortative. mating 75 



Average 13, 17 



deviation. 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 



i variability 67 



Calculating machines 7 



tables 7 



Caprifoliacese, variability 70 



Caryophyllaceae, variability 67 



Character defined 1 



Chauvenet 's criterion 12 



Class, denned 



range 



Closeness of fit 24 



Coefficient of correlation 44 



regression 47 



variability 16, 63 



Coelenterata, see Hydromedusa. 



Color, measurement of 6 



Compositae, correlation 78 



, variability 69, 70 



Comptometer 



Coordinate paper. 11 



Cornaceae, variability 70 



Correlated variability 42 



Counting, methods of 3 



Crabs 63 



Criminals, skull index 64 



Critical function 21 



Cruciferse, variability 70 



221 



j 



