Jelly-fish, star-fish and sea-urchins : being a research on primitive nervous systems

Darwin and After Darwin Volume II: Post-Darwinian Questions, Heredity and Utilit

Darwin and after Darwin : an exposition of the Darwinian theory and a discussion of post-Darwinian questions

Darwin and After Darwin Volume III Post-Darwinian Questions Isolation and Physiological Selection

The More Excellent Way: A Poem (Classic Reprint)

Animal Intelligence

The Scientific Evidences of Organic Evolution

An Examination of Weismannism

Darwinism Illustrated: Wood-Engravings Explanatory of the Theory of Evolution

Jelly-Fish, Star-Fish, and Sea Urchins: Being a Research on Primitive Nervous Systems