6. batissa = 2d 1.
7. batiwwi = 2d 2.
8. batti-biata = 2d 3.
9. batti-biama = 2d 4.
10. bauwé = 2d 5.

That this method of progression is not confined to the least developed
languages, however, is shown by a most cursory examination of the numerals
of our American Indian tribes, where numeral formation like that exhibited
above is exceedingly common. In the Kootenay dialect,[93] of British
Columbia, _qaetsa_, 4, and _wo-qaetsa,_ 8, are obviously related, the
latter word probably meaning a second 4. Most of the native languages of
British Columbia form their words for 7 and 8 from those which signify 2
and 3; as, for example, the Heiltsuk,[94] which shows in the following
words a most obvious correspondence:

2. matl. 7. matlaaus.
3. yutq. 8. yutquaus.

In the Choctaw language[95] the relation between 2 and 7, and 3 and 8, is
no less clear. Here the words are:

2. tuklo. 7. untuklo.
3. tuchina. 8. untuchina.

The Nez Percés[96] repeat the first three words of their scale in their 6,
7, and 8 respectively, as a comparison of these numerals will show.

1. naks. 6. oilaks.
2. lapit. 7. oinapt.