Stars, planets, constellations, and the like, except _sun_, _moon_, _stars_, _earth_.
_Mars_, _the Milky Way_, _the Pleiades_.
20.

Ordinal numbers used to designate numbered political divisions, sessions of Congress, names of regiments, Egyptian dynasties, and the like.
_Second Congressional District_, _First Ward_, _Ninth Precinct_, _Forty-third Congress_, _Sixth Massachusetts Regiment_, _Fifth Dynasty_.
21.

Names of genera but not of species: except that in botanical and zooelogical copy the species may be capitalized if derived from a proper name.
_Agaricus campestris_ _Parkinsonia Torreyana_ _Pterygomatopus schmidti_, (Medical).
The English derivatives from these scientific words are not capitalized.
We write of the _agarics_, the _felids_, the _carnivores_, etc.
22.

_Father_, _mother_, and other words denoting relationship when used with a proper name or without a personal pronoun.
_I saw Aunt Lucy and Cousin Charles._ _I saw my aunt Lucy and my cousin Charles._ _I have received a letter from my mother._ _I have received a letter from Mother._ 23.

Names of political parties and of philosophical, literary, and artistic schools, and their adherents.
_Republican_, _National Liberal_, _Social Democrats_, _Stoics_ (but _neo-Platonism_, _pseudo-Christianity_, etc.) _the Lake school_, _the Romantic movement_, _the Symbolic school of painters_.
24.