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204 V

Le Pacifique de 5000 a 2000 avant le present / The Pacific from 5000 to 2M )BP

tions shows that while Polynesians have a high frequency of rocker jaw, the highest fre- quency (excludingextremely small samples) actually occurs in the Gulf of Papua New Guinea (Purari Delta) where the rocker jaw is present in 59/61 individuals, and in no populations, including those from China and Japan, do the incidences fall below 50% (see figure 1). In fact, the data could more reasonably be interpreted as indicating that rocker jaw is primarily an Australoid feature. Of 14 samples with the highest frequen- cies of rocker jaw, only two are Polynesian and the rest are either from Australiaor New Guinea.1t is not valid therefore to claim Polynesian affinities for Lapita material on the basis of skeletal characteristics which are no more particular to Polynesians, than they are to any other Pacific population. The Lapita people in general, far from looking like

1 Figure 1 Graph of frequency of the rocker jaw mprphology across the Pacific (data taken from Pietrusewsky 1984).

Kou Suamp Tones-Ssmm V e n t r M * ~ , Mvme-nlht Rlran dell. Solanan Islands Rrosdhcach Arnhm land SoclcIv lrlands Taarun~e W m e m Au*ral~a DmeoCclchn Scplk n v n Coastal NSW Ilhvall N e w Zealand LUwn D n a Island NDllhrm T r m l u y Muquerr Soulhem @unsland New Ireland Sulu Archlpsl~#o , ~

ROCKER JAW CRAP14

Smla C n v l.""

M an.w.Tv~;; j -

A h i n l l v Island

Ncw llnuln Ncu, Calcdon~a

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