9. trasa = 10 - 1?
10. sabulu.

One special point to be noticed in this scale is the irregularity that
prevails between 7, 8, 9. The formation of 7 is of the most ordinary kind;
8 is 2 fours--common enough duplication; while 9 appears to be 10 - 1. All
of these modes of compounding are, in their own way, regular; but the
irregularity consists in using all three of them in connective numerals in
the same system. But, odd as this jumble seems, it is more than matched by
that found in the scale of the Karankawa Indians,[102] an extinct tribe
formerly inhabiting the coast region of Texas. The first ten numerals of
this singular array are:

1. natsa.
2. haikia.
3. kachayi.
4. hayo hakn = 2 × 2.
5. natsa behema = 1 father, _i.e._ of the fingers.
6. hayo haikia = 3 × 2?
7. haikia natsa = 2 + 5?
8. haikia behema = 2 fathers?
9. haikia doatn = 2d from 10?
10. doatn habe.

Systems like the above, where chaos instead of order seems to be the ruling
principle, are of occasional occurrence, but they are decidedly the
exception.

In some of the cases that have been adduced for illustration it is to be
noticed that the process of combination begins with 7 instead of with 6.