12 Field Columbian Museum — Anthropology, Vol. II. 



Norma Posterior. — Well marked pentagonal form, broad through 

 the parietal tubera, sides longer than the base, with well marked 

 vertical angle. There is only a difference of 19 mm. between the 

 asterionic diameter and the maximum cranial diameter. 



Norma Lateralis. — The curve is gradual from ophryon to within 

 about 25 mm. of obelion ; the curve is more rapid then till just below 

 lambda, which is the most posterior point of the skull ; the portion 

 from inion to opisthion is almost horizontal. Deep depression at 

 nasion with a considerable amount of alveolar as well as facial prog- 

 nathism. The temporal fossa is broad and long, the superior line 

 extending within 45 mm. of the sagittal suture just behind bregma, 

 within 50 mm. of lambda, and within 45 mm. of inion. The direction 

 of the left temporo-parietal suture is almost straight, except for a 

 slight curve just above its junction with the supra-mastoid crest, the 

 right suture is even more nearly a straight line. Left pterion is 

 formed by a frontal process of the temporal bone, which joins the 

 frontal to an extent of 7 mm. Right pterion approaches a K. 



Norma Inferior. — Foramen magnum almost circular, measures 

 36x33 mm. The condyles are placed far forward and almost meet in 

 the median line. The plane of the foramen magnum is directed con- 

 siderably forward, so much so that the occipital angle of Brocais 22°. 

 The basilar process is narrow and measures 21 mm. in length; the 

 pharingeal tubercle is well marked, with deep navicular fossa. On 

 the left side the foramen ovale is almost circular in outline, and the 

 foramen spinosum is situated almost at the tip of the spinous process, 

 which on this side projects backward beyond the glasserian fissure. 

 The more normal condition prevails on the right side ; but the external 

 pterygoid plate is connected with the spinous process by a bony 

 spiculum which passes over the foramen ovale and just to the inside 

 of the foramen lacerum. The glenoid fossae are not deep, but long 

 and narrow from side to side. The palate has a decided U-shape, 

 and is comparatively shallow. 



Sutures. — Coronal extremely simple; sagittal and lambdoidal 

 rather complex. The coronal suture is synostosed and obliterated 

 below stephanion ; the sagittal is obliterated in its anterior two-fifths, 

 and throughout its inner portion is firmly synostosed, the lambdoidal 

 is partially synostosed. The upper half of the nasal suture is anky- 

 losed. 



Processes. — Mastoids of medium size, small internal pterygoids, 

 but external pterygoids broad, with deep pterygoid fossae. The 

 external angular process of the frontal bone is unusually long but not 

 so massive as in some other skulls of this collection. 



