132 /.. ir. G. Bihchner: 



I have therefore worked out the ranjies (if variation for the whole 

 of the twenty-seven observations for the males, the females, and both 

 sexes combined. I have subtracted the minimum ranp-e of variation 

 from the mean, and the mean from the maximum, added all these 

 differences together, and divided the quotient by fifty-four, that is, 

 by twice the number of recorded observations, being once for the 

 minima and once for the maxima. 



The result is that in the twenty-seven craniotrigonometrical obser- 

 vations herein recorded, in fifty-two Tasmanian crania the range of 

 variation is as follows : — 



For males, 7.9. 



For females, 7.5. 



For both sexes, 9.9. 

 As, however, thirteen of my twenty-seven observations comprise angles 

 only, in which the range of variation can never be appreciably great, 

 I have again worked out the range of variation for those fourteen of 

 the twenty-seven observations which do not comprise such angles, and 

 with the following results : — 



For males, 10.2. 



For females, 9.9. 



For both sexes, 10.1. 

 In either case the range of variation is so surprisingly small that 

 it would seem to be reasonable to apply Ewart's dictum that " Ani- 

 mals reproduce themselves with great uniformity if kept apart," and 

 to conclude by stating that the Tasmanian is a pure race. This con- 

 clusion is the more warranted, because when the results obtained 

 by my colleagues, Drs. Berry and Robertson, are available, it will 

 be found that they achieve identical results by different methods. 



LTTEIRATURE. 



1. Huxley, T. H. -Man's Place in Nature, MacMillan and Co., 1897. 



2. Bolk, L. — ^" On the Slope of the Foramen Magnum in Primates :" 



Repiiiit from Prnceorlings, Dec. 24th, 1909, of Koninklijke 

 Akademie van Wetenschappen te Amsterdam. 

 :\. Sollas, W. J.—" On the Cranial and Facial Characters of the 

 Neaudertal Race," Pliil. Trans., B, vol. 199, 1907. 



4. Schwalbe, 0. — " Studien iibi r Pithecantlnopus erectus, Dubois," 



Zeit, fill- M()i|)h. und .Vnthrop.. Ikl. I., 1S!)9, |)p. 10 et see). 



5. Berry, \i. J. A., and Robertson, A. W. D. "The IMace in Nature 



of the Tasmanian Aboriginal, as Deduced from a Study of his 

 Oalvarium," Part I., Proc. Hoy. Soc. Edinburgli, vol. xxxi.. pt. 

 1, No. 3. 



