Yes they definitely talk about the girls who are fit to marry and about those who are not fit.
See the following verses:
A householder should marry a wife who comes from the same class as
he, who has not been married before, and who is younger than he. A
marriage can be contracted only between persons not belonging to a
family with the same ancestral seer and not related within six
degrees on the side of the legal or the biological father , or within
four degrees on the mother’s side.
Gautama Smriti 3.24
Householder––after bringing his anger and excitement final bath with
the permission of his teacher, he should select for his wife a woman
who does not belong to a lineage with the same ancestral seer who has
not experienced sex before, who is younger than he and belongs to the
same class as he, and who is not related within four degrees on the
mother’s side or six degrees on the father’s side. He should kindle
the nuptial fire.
Vashishta Dharma Sutras 7.3
As regards, the practice followed in South India, Baudhayana says the following:
There are five areas in which the practices of the south and the north
differ from each other . We will explain the ones peculiar to the
They are: eating in the company of an uninitiated person, eating in
the company of one’s wife, eating stale food, and marrying the
daughter of the mother’s brother or the father’s sister.
The ones peculiar to the north are: selling wool, drinking rum,
trafficking in animals with teeth in both jaws, making a living as a
soldier, and travelling by sea. If a man follows the practices of the
former in the latter, and those of the latter in the former, he
becomes defiled. Each practice is based solely on the authority of the
customs of that region.
That is untrue, say Gautama. A man should
pay heed to neither set of practices, because they are shown to be
opposed to the tradition of cultured people.
Baudhayana Dharma Sutras 1.2.3