Note 5 — THE SEX-PASSION

These are (1) the curious, not yet explained, facts of “Telegony”—i. e., the tendency (often noticed in animals) of the children of a dam by a second sire to resemble the first sire; (2) the probable survival, in a modified form, of the primitive close relation (as seen in the protozoa) between copulation and nutrition; (3) the great activity of the spermatozoa themselves.