402. There are two genders, _Masculine_ and _Feminine_. Masculine and
feminine nouns are called _Gender nouns_. Nouns without gender are
called _Neuter_.
403. Gender is, properly speaking, the distinction of sex. In Latin,
a great many things without life have gender in grammar, and are
masculine or feminine.
404. Some classes of substantives may be brought under general heads of
signification, as below, like the names of rivers and winds (405), which
are usually of the masculine gender, or of plants (407), which are
usually of the feminine. When the gender cannot be determined thus, it
must be learned from the special rules for the several stems and their
nominatives.