170 PROCEEDINGS OF THE NATIONAL MUSEUM vol.91 



assembled in the present publication, and no pains have been spared 

 to make them thoroughly reliable. All the measurements were made 

 by the author, using the same tested instrimients and identical methods 

 throughout. Several parts of the series have been sexed two or even 

 three times ; some, for the sake of accuracy, were completely remeasured 

 and some determinations have been added to those of the first Catalog.^ 

 It has been necessary to make only inconsequential changes in the 

 earlier figures, so far as they went. 



The methods used are given in the author's "Practical Anthro- 

 pometry," ^ but for the sake of completeness they are repeated 

 herewith: 



THE VAULT 



Maximum length of the skull, or greatest antero])osterior diameter. — 

 From the center of the glabella to the most distant normal point of 

 the occiput. 



Maximum breadth oj the vault, or the greatest transverse diameter. — 

 Above the supramastoid crests (posterior roots of the zygomae). 



Height oj the vault: The basibregmatic height. — The linear distance 

 from the midpoint on the anterior edge of the foramen magnum 

 (basion) to bregma. 



FACE 



Menton-nasion height. — Total morphological facial height on the 

 skull. The distance from menton to nasion, with the lower jaw in 

 place and the teeth in normal apposition. 



Alveolar point — nasion height. — The upper facial height on the 

 skull. The distance from the upper alveolar point to nasion. 



Maximum bizygomatic diameter. — The greatest bizygomatic breadth. 



BASE 



Endobasion-nasion diameter. — Distance between the endobasion and 

 nasion. 



Endobasion- subnasal point diameter. — Distance between endobasion 

 and the left subnasal point. 



Endobasion-prealveolar point rfmmei!gr.— Distance between endo- 

 basion and the prealveolar point. 



Angles oj facial and alveolar prognathism. — The most satisfactory 

 way of obtaining these angles is to chart, with the aid of the sliding 

 compass, the three measurements together mth the nasal and naso- 

 alveolar heights, and measure the angles directly by a transparent 

 (celluloid) goniometer. For the naso-alveolar height for this purpose 

 it suffices to take the difference between the nasal and nasion-alveolar 

 point measurements. 



' Catalogue of human crania in the United States National Museum collections: The Eskimo, Alaska and 

 related Indians, northeastern Asiatics. Proc. U. S. Nat. Mus., vol. 63, art. 12, 51 pp., 1924. 

 » Wistar Institute, Philadelphia, 1939. 



