Taxonomy: The science of classification.

Tertiary Period: A geological time-division corresponding to the rock-system that comprises the greater part of the Cenozoic group. It is made up of four series, namely, the Eocene, Oligocene, Miocene, and Pliocene. Its close marks the beginning of the Glacial or Pleistocene epoch.

Tissue: A layer of uniform cells specialized for the same function.

Tissue Cell: One of the somatic cells of which a tissue is composed.

Troglodytic: Resembling the chimpanzee and the gorilla.

Woods Hole: The seat of the Marine Biological Laboratory. It is a watering-place on the New England coast opposite Martha’s Vineyard.

Zygote: The synthetic cell formed by the union of two gametes and giving rise by division either to a new multicellular organism, or to a rejuvenated cycle of unicellular forms.

INDEX TO AUTHORS

INDEX OF SUBJECTS