66/94 The Akra words for 7 and 8, _paggu_ and _paniu_, appear to mean 6-1 and 7-1, respectively; and the same is true of the corresponding Tambi words _pagu_ and _panjo_.[210] The Watji tribe[211] call 6 _andee_, and 7 _anderee_, which probably means 6-1. These words are to be regarded as accidental variations on the ordinary laws of formation, and are no more significant of a desire to count by sixes than is the Wallachian term _deu-maw_, which expresses 18 as 2-9, indicates the existence of a scale of which 9 is the base. One remarkably interesting number system is that exhibited by the Mosquito tribe[212] of Central America, who possess an extensive quinary-vigesimal scale containing one binary and three senary compounds. The first ten words of this singular scale, which has already been quoted, are: 1. |