THOMAS] ZAPOTEC NUMERALS 885 
true for the count from 60,80, etc. This is mentioned because it will 
be found in some systems that 41 is not formed by adding 1 to 40, but 
is formed by counting the one on the next score—that is to say, one on 
the third score. This difference, slight as it seems to be, is neverthe- 
less an important characteristic in comparing the numeral systems. 
The Maya method of writing numbers to 19, as shown above, is pre- 
cisely in accord with the Mexican count. 
The second example of the quinary-vigesimal system I present is 
that in use among the Zapotecs, as given by Cordova in his Arte del 
Idioma Zapoteco. This is so burdened with alternates that it will be 
best understood by presenting the regular series first and the alter- 
nates, so far as is necessary, in a separate list. The equivalent figures 
placed to the right show my interpretation of the terms. However, 
the correctness of the interpretation can be easily tested by considering 
the numbers up to 10 heretofore given in connection with those above 
10 here presented. 
Zapotec 
10 chii. 
11 chii-bi-tobi=10+1. 
12. chii-bi-topa, or chii-bi-cato=10+2. 
13 chii-No, or chii-bi-chona=10+3. 
14 chii-taa=10+-4. 
15 chino, or ce-caayo-quizaha-cal le=15, or 20—5. 
16 chino-bi-tobi=15+1. 
17 chino-bi-topa, or chino-bi-cato=15+ 2. 
18 chino-bi-chona=15-+-3. 
19 chino-bi-tapa=15--4. 
20. cal le. \ 
21 eal le-bi-tobi=20-+1. 
22 cal le-bi-topa, or cal le-bi-cato=20+-2. 
23 cal le-bi-chona, or cal le-bi-cayo=20+3. 
24 cal le-bi-tapa, or ete=20+-4. 
25 cal le-bi-caayo=20-+-5. 
26 cal le-bi-xopa=20+6. 
27 cal le-bi-caache=20-+7. 
28 cal le-bi-xono=20+8. 
29 cal le-bi-gaa=20-+9. 
30 cal le-bi-chii=20+10. 
31 cal le-bi-chii-bi-tobi=20+10+1. 
32 cal le-bi-chii-bi-topa=20+10-+ 2. 
33 cal le-bi-chii-bi-chona, or cal le-bi-chiifio=20+10+3. 
34 cal le-bi-chii-bi-tapa, or cal le-bi-chii-taa = 20+-10+4. 
35 cal le-bi-chino=20-+15. 
36 cal le-bi-chii-bi-xopa=20+10+-6. 
37 cal le-bi-chii-bi-cache=20-+ 10+-7. 
38 cal le-bi-chii-bi-xono=20+10-+8. 
39 cal le-bi-chii-bi-caa=20+10-+9. 
40 toua. 
41 toua-bi-tobi=40+1. 
50 toua-bi-chii=40-+ 10. 
51 toua bi-chil-bi-tobi=40+ 10+1. 
So to 54. 
