Heterobranchus, [146].

Hewitt, Mr., [124], [181].

Hexanchus, [172].

Hipparion, [97], [134].

Homogeny, [158].

Homology, bilateral or lateral, [156], [164].

Homology, meaning of term, [7], [156].

Homology, serial, [159].

Homology, vertical, [165].

Homoplasy, [159].