CATALOG OF HUMAN CRANIA — HRDLICKA 171 



ORBITS 



Orbital height. — The maximum height between normal inferior and 

 superior borders, exclusive of any notches. Seldom perfectly vertical, 

 though near. 



Orbital breadth. — The greatest breadth of the drbital lumen, from 

 the lacrimal point. It is only incidentally at exact right angle with 

 the height, though always near. 



NOSE 



Nasal height. — Height from midpoint of line connecting lowest 

 parts of the borders of the two nasal notches, to nasion. 

 Nasal breadth. — The maximum breadth of the nasal cavity. 



UPPER ALVEOLAR PROCESS 



The length of the arch is its anteroposterior diameter, in the median 

 line, from the prealveolar point to the midpoint of a line connecting 

 the posterior limits of the arch. These limits are the posterior 

 tuberosity of the arch on either side, or, when this is not developed, 

 the alveolo-palatine suture. 



The breadth of the upper alveolar process is its breadth maximum, 

 obtained by applying the branches of the sliding compass, symme- 

 trically, to the greatest bulge of the process above the molar teeth. 



SKULL CAPACITY 



See pages 135-138 of "Practical Anthropometry." 



THE LOWER JAW 



Height at the symphysis. — The height from the lowest median point 

 of the jaw, at the symphysis, to the lower alveolar point; the lower 

 alveolar point being the tip of the process of the bone between the 

 median incisors. 



THE GROUPS AND TERRITORY INCLUDED 



In addition to the Eskimo proper, it would be important to include 

 in this catalog measurements of crania of Alaskan peoples who, on 

 account of linguistic affinities, were hitherto classed with the Eskimo 

 but who now, with the present available skeletal remains, are recog- 

 nized as quite different. Furthermore, satisfactory data can now be 

 provided on two extinct groups of southwestern Alaska and on addi- 

 tional Alaskan Indians, all of which will permit for the first time a 

 definite view of both the older and the more recent population of 

 Alaska, which is one of the basic desiderata of American anthropology. 

 Unfortunately the costs forbid, so that the data on the non-Eskimo 

 Alaskan people and those on the Siberians must be left over for future 



