142 L. ^V. G. Biiehiier 



... V • Glabellii Hrosthioii 



Oii-iii:.! Strial Basi iiiisal ''■'hjI","^' tinaUiir ^^!^}!^°!" luostliioii -labella 

 i,uiiil)er. number. lon-th ?, , in'le\. ,'' lu ''••**'0" ''*'*'°" 



BOTH SEXES. 



For both sexes ooml)ined there are 32 crania, which yield a gnathic 

 index of 102, that is, the Tasmania is shown to be niesognathic. Of 

 the seixes considered separately, there are 21 males, with a gnathic 

 index of 102.3, and 11 females, witli an index of 101.6, that is, the 

 sexes, individually or collectively, are shown to be nicsognatliic in 

 type. 



Prior to the present work, the lai'gest number of Tasmanian crania 

 examined, with respect to the degree of prognathism, as determined 

 by Flower's index, was 34, a total made up of a combination of indi- 

 vidual examinations, and thus collectively referred to by Turner (29). 

 The minimum index was 96.9, the maximum 113.2, and the m€>an 

 for the series was 103.6, which thus brings the series into the prog- 

 nathic group. 



It will he noted that the two sei'ies of figures produce different 

 results, my series of 32 giving a niesognathic result, and the previous 

 collective group of 34 producing a prognathic figure. The actual 

 numerical difference is, however, but slight, as it only amounts to 1.6, 

 and is almost certainly due to the use of insufficiency of numbers. 

 To overcome this objection in so far as is possible to us, I now 

 propose to combine my own entirely new series, of 32 crania, with 

 those of other observers. 



I have, therefore, availed myself of the necessary figures recoided in 

 (a) Flower's Catalogue of osteological specimens in the Museum of 

 the Royal College of Surgeons, in London (9), (b) Turner's Memoir, 

 in which are given the observations of the crania in the Brussels 

 Museum, the University of Oxford, and tlu' I'niversity of Edinburgh, 

 (c) Klaatsch's Memoir (32) on the Australian skull, (d) one from the 



