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Titles
- A contribution to the history of the germ-layers in clepsine1
- A marine biological observatory1
- Changes preliminary to cleavage in the egg of clepsine1
- Description of Clepsine plana1
- Do flying fish fly?1
- Some new facts about the hirudinea1
- Specialization and organization: companion principles of all progress : the most important need of American biology1
- Spermataphores as a means of hypodermic impregnation1
- The external morphology of the leech1
- The inadequacy of the cell-theory of development1
- The kinetic phenomena of the egg during maturation and fecundation (oökinesis)1
- The naturalist's occupation1
- The seat of formative and regenerative energy1
- The segmental sense-organs of the leech1