Illegitimate symbolic conceptions, [251].

Illustration by clock-thinking, [249].

Imaginal disks, [46], [170].

Implacental mammals, [67], [68].

Independent origins, [152].

Indian butterfly, [30].

Indian region's butterflies, [83].

Indians and cholera, [192].

Individual, meaning of word, [2].

Infirm, care of, [192].