ELEMENTARY ZOOLOGY
Pp. xv+492, 172 figs., 12mo, 1901, $1.20
FIRST LESSONS IN ZOOLOGY
Pp. x+363, 257 figs., 12mo, 1903, $1.15
AMERICAN INSECTS
Pp. vii+671, 812 figs., 11 colored
plates, 8vo, 1905 (_American Nature
Series, Group I_), $5.00. Students'
edition, $4.00
DARWINISM TO-DAY
Pp. xii+403, 8vo, 1907, $2.00
HENRY HOLT AND COMPANY
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