SEED-DISPERSAL AND GEOLOGICAL TIME
The shifting of the source of Polynesian plants from the New to the Old
World.—The floral history of Polynesia stated in terms of geological
time.—The suspension of the agencies of dispersal in later
periods.—Parallel differentiation in the course of ages of climate,
bird, and plant.—New Zealand.—Insects and bats as agents in
plant-dispersal.—The effective agency of sea-birds in other
regions.—The observations of Ekstam.—The Spitzbergen controversy.—The
efficacy of ducks as distributors of aquatic plants.—Summary
_Pages_ 502-514