27. These end in -os, -ōs, Masculine or Feminine; and -on, Neuter. They are
mainly proper names, and are declined as follows:--

Barbitos, m. Androgeōs, m., Īlion, n.,
and f., _Androgeos._ _Troy._
_lyre._
_Nom._ barbitos Androgeōs Īlion
_Gen._ barbitī Androgeō, -ī Īliī
_Dat._ barbitō Androgeō Īliō
_Acc._ barbiton Androgeō, -ōn Īlion
_Voc._ barbite Androgeōs Īlion
_Abl._ barbitō Androgeō Īliō

1. Nouns in -os sometimes form the Accusative Singular in -um instead of
-on; as, Dēlum, _Delos_.

2. The Plural of Greek nouns, when it occurs, is usually regular.

3. For other rare forms of Greek nouns the lexicon may be consulted.

* * * * *

THIRD DECLENSION.

28. Nouns of the Third Declension end in -a, -e, -ī, -ō, -y, -c, -l, -n,
-r, -s, -t, -x. The Third Declension includes several distinct classes of
Stems,--

I. Pure Consonant-Stems.
II. Ä­-Stems.