WHOLE VOL. SKELETAL REMAINS OF EARLY MAN — IIRDLICKA I25 



until at the bregma it forms a low elevation 35 mm. in diameter. 

 It raises the bregma region to quite a marked elevation, which ex- 

 tends, dwindling gradually, to over 20 mm. beyond the coronal suture. 

 This formation recalls strongly the similar feature on the skull of 

 the Pithecanthropus. 



The frontal bone of the Rhodesian man is also relatively ver}- 

 narrow, and that even posteriorly (diam. frontal min., 9.9; diam. 

 frontal max., 12.3 cm.; index, 80.5). Antero-iX)steriorly the frontal 

 bone was relatively small, though appearing larger through the supra- 

 orbital protrusion. In its great slope, in its marked metopic ridge, 

 narrowness, and also in its anterior flare and relative smallness as 

 a whole the Rhodesian frontal approaches closely the frontal of 

 the Pithecanthropus ; though the ridges in the Rhodesian skull are 

 much the heavier. 



Viewed from the top the skull presents a long ovoid with a 

 narrower end anteriorly, much as in Spy No. I and especially in the 

 La Quina adult. The parietal eminences, however, are diffuse and 

 located more about the center of the bone, hence less posteriorly and 

 inferiorly than in the typical Neanderthalers. From side to side the 

 parietal region is fairly oval (approaching circular), with but a trace 

 of an elevation along the sagittal suture. Antero-posteriorly the 

 outline of the skull shows the very sloping forehead, appearing some- 

 what higher than it is through the metopic ridge, followed by the ele- 

 vation of the bregma due to the same metopic ridge. A slight post- 

 bregmatic depression is followed by an elevation at about the middle 

 of the sagittal region, then another mild depression to the lambda, 

 a slight bulge, and a medium convexity of the upper part of the 

 occipital squama ; below which is a pronounced transverse occipital 

 torus, and this is followed by a practically simian flat planum occipi- 

 tale. The skullcap as a whole is quite large and impresses one as 

 massive. 



The sutures of the skull, for the most part are. curiously, well 

 knitted, especially the sagittal and coronal, coming nearer in this 

 respect to modern man than those of the various Neanderthal skulls. 

 The serration of the lambdoid is submedium, as compared to modern 

 human standards. 



Laterally the frontal and the parietals show uncommonly strong, 

 though not excessively high, impressions of the temporal muscles. 

 The nearest approach of the upper temporal line to the sagittal suture 

 is approximately 4.8 on the right, and 4.1 cm. on the left side. 

 Where the ridges pass the coronal suture, the bones of the skull show 

 a fairly marked bulge, from which the temporal lines are deflected 

 considerably upward. The temporal region is about as full as in 



