208 L. W. (r. Hih-luH'r: 



In Tal)le 1 the oenenilised results esriinated ln(jiiietrically are 

 set fiirtli. Tlie nature of the observations, the ti-ue means, with 

 tlieir ]ii(ibal)le errors, the standard deviations with their probable 

 eridrs. tnj^^etlier with the mininiuiii and maximum figures for each 

 oliservation, are displayed in theii- lespective orders. 



T.AHLK I. 



T.VSMANIAN Ch.ANI.S. 

 Nature of Oliservation 



1 - Lengtli of Fur. ore. magnum 



2 - Breadth of For. ore. magniun 



3 - Foramiiial Index 



4 - Broca's Anj^le 



5 - Foraiiiinal Angle (Biichnei') 

 () - Nasion-Inion Length 

 7 - Basal Index { Biichnei-) - 

 S - Basal Angle (Biichner) - 



A stu'dy of Table 1 reveals some interesting facts. It will be 

 noted that, as judged from the standard deviations, the observa- 

 tions numbers 7 and 8. which are based on the nasion-inion plane, 

 are less variable tlian 5 or 6, which are estimated bv Broca's metliod. 

 or the Frankfort plane methdd. The standaid deviation for bdth 

 the Basal Index, numlier 7, and the Basal Angle, number 8, are 

 shown to be very small. 



This, thei-efore, would apjjcar tn suppdtt the contenticm referred 

 to in an earlier part of this work, that the nasion-iniim plane is 

 leally the best from which td estimate the slope and approximate 

 jidsiridii of the foramen occipitale »ia(//ni/n. 



In order td ccmipai-e the figures df Tal»le 1 witli those of other 

 I'aces. I have utilised sevei-al plates df Bei'i-y and Kdbertson's 

 Atlas (if Australian Crania, in (irdei- to dlitain the necessary data. 

 As this worklo is in the hands df the jirinter. T have to express my 

 thanks to Pi-ofessdr Bei ly and Dr. Kdbeitsdu fdr allowing me to 

 use their original drawings. The dbservations wliieh I have 

 recorded aie taken frdm the first 52 tracings of Ndrmae A. 



The o])servatidiis wliich I have recorded are as follows : — 

 5. Basal Index, 

 fi. Basal Angle. 



7. Foraminal Angle (Krankf.irt Plane). 



8. Bi-dca's Occipital angle. 



The dther source df cdinpaialive data I have absti-acted from 

 Bulk's Wdrks. Thi' generalised results for both the Australian 

 and [{dlk's figures ai'c set fdrth in Tallies ii. and iii. I'espectively. 



