Pru(jn((thitiiii at T(1'<iiuih (>i n Aljorlytunl. 



147 



Notwithstandinjr that there are at the two ends of the scale known 

 ]>ure and impure races, it is sutKciently clear that it would be very- 

 injudicious to endeavour to draw any conclusions whatsoever as to 

 the purity or impurity of race from the ranr!;e of variation of a 

 secondary racial character like pro<rnatliism. What, however, does 

 emerjje very clearly from the present research is that the Tasmanian 

 is, as estimated from Flower's ofnathic index, on the meso-prognathic 

 border line, and slightly more orthognathic than the Australian. 



In conclusion, there are appended five frequency polygons of the 

 gnathic indices in the selected races, and Table VI., which establishes 

 comparisons of tlie prognathic index, and measurements between 

 anthropoid apes, prehistoric and recent man. (See Fig. Til.). 



The anthro})oid tit^ures are derived from Oppenheim (34), and from 

 them I have calculated the jrnathic index. 



Fig. rV. — Tasmanian 



Australian 



Neandertal (Klaatsch) 



Glorilla — • — • — •• — ■ — ■ — • — -• 

 (Superpo.sed on basi-na.sal axis.) 



The remaining measurements are mostly from Flower's Catalogue, 

 supplemented in the case of the mesognathic 90 Australians by 

 figures derived from other sources. Concerning the Tasmanians, the 

 32 there included are the original contribution of this work to the 

 subject. 



Tlie entire results are classified according to their degree of pro- 

 nieso-, or orthognathism, but it is important to bear in mind that the 

 results set forth for the !)0 Australians. 32 Tasmanians, 19 Andamanese 



