550 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



The supraorbital ivdges^ pronounced in both sexes, are seldom very 

 heavy. They show a marked difference from those in man, consisting- 

 in their tapering toward the median line and enlarging- outward, up 

 to the malo-f rental suture; in man these ridges are generalh" most 

 pronounced in their mesial extremity and taper outward. 



The sutures of the vault show well-developed, often very fine and com- 

 plex (sagittal and Ikmbdoid), serration. The coi'onal, the most simple, 

 presents below its middle, in nearh' every case where the oliliteration is 

 not too advanced, a backward incurvation or angle, the sign of a fetal 

 fontanel and a still earlier developmental separation in this location.^' 



The general order of si/nostoK/.s in the sutures of the A'ault is lamb- 

 doid, sagittal (the two may coincide), coronal, temporo-occipitai, 

 tempo ro-parietal. 



Sutural and fontanel ossicles occur not infrequentlj', but seem to be 

 limited to th(^ posterior part of the skull. There were found several 

 small ones in each asterion in No. 14220J; one at right asterion in No. 

 142195; one in each temporo-occipitai in No. 142200; one in right 

 temporo-occipitai and one in lambdoid in 142171; three in right and 

 two in left temporo-occipitai in No. 142169; several small in right 

 temporo -parietal in No. 142186. Several of the male and three of the 

 female skulls showed advanced obliteration, which involved an}' acces- 

 sory bones which may have existed. 



In the skull with uncertain sex (No. 142184) there are two sutural 

 bones in the sagittal and one ossicle in each lambdoid articulation, and 

 several in and about each asterion. Other larger sutural l)ones existed 

 in this specimen along the sagittal, l)ut their boundaries are partly 

 obliterated; a persisting incomplete boundarj- of one near bregma 

 looks at first sight like a partial parietal suture. Apparently there 

 were in this skull disorders in ossilication. 



No form oi parietal division exists in any of the twenty-four skulls. 



As to pter ion the conditions are as follows: 



Male. Female. 



Parieto-sphenoidal artit'ulation, both slides 6 5 



Parieto-sphenoidal articulation, right side 2 



Fro n to-temporal articulation, both sides .3 



Fronto-temporal articulation, left side. 2 



Unrecognizable because obliteration 4 1 



The skull of uncertain sex (No. 142184) shows also a bilateral parieto- 

 sphenoidal articulation. The H pterion therefore, or the form which 

 is general in man, occurs also in a very large majority (80 per cent of 

 all the nonobliterated articulations) * of these orangs. 



""'For details concerning this feature and bibliography, see A. Hrdlicka, Divisions 

 of the Parietal Bone in ]Man and Otlier Mammals, Bull. Amer. Mus. Nat. Hist., XIX, 

 1903, pp. 231-383. 



^Anoutchin (Bull. Soc. d'Anthrop., 1878, p. 332) in 65 orang crania found the 

 fronto-temporal articulation on one or both sides in 29.2 per cent of the skulls. Doctor 

 Abbott's collection, reported in similar way, shows the condition in 27.3 per cent of 

 the skulls — results remarkablv alike. 



