889 



5763. The hinder moiety of a vertically and transversely bisected cranium of a 

 Tasmanian. 



It shows the angle at which the sloping sides of the calvarium meet at the sagittal 

 prominence. 



Prepared in 1852. 



5764. The hinder moiety of a vertically and transversely bisected cranium of a 

 Greenlander. 



It shows the vertical ascent of the lateral walls of the cranium from above the base of the 

 zygoma for a certain height, and then their gradual converging curve, to where they meet at 

 the elevated median line, resembling a Gothic arch. 



In the Australian, the cranial parietes at the same part incline outwards to the parietal 

 protuberances before they converge to the elevated median line, the cranium being narrower, 

 its parietes thicker, and the overlapping part of the squamosal less extensive than in the 

 Greenlander. But the increase of thickness in the part of the parietal which is so overlapped 

 is well marked in the Greenlander. This cranium is also characterized by the great breadth 

 and depth of the basioccipital. As individual peculiarities may be noticed, the strong supra- 

 mastoid ridges and the great depth of the lower part of the meatus auditorius. The par- 

 occipital protuberances are also developed. 



Prepared in 1852. 



5765. The hinder part of a vertically and transversely bisected skull of an Englishman. 



This differs from the preceding by the outward inclination of the cranial walls where they 

 rise above the root of the zygoma, and by the more sudden inclination of the upper part of 

 the arch to its vertex or key-stone. Here also may be noticed the increased thickness of the 

 parietal where it is overlapped by the squamosal. The basioccipital has more diploe and less 

 dense walls than in the Australian, and is more concave superiorly. 



Prepared in 1852. 



The following specimens, to No. 5813 inclusive, exhibit the texture of different parts of 

 the Human skeleton. 



5766. A vertical transverse section of the Human cranium. 



It includes the coronal suture, with the contiguous parts of the frontal and parietals, and 

 with part of the basioccipital, sphenoid and squamosals. The minutely cellular structure in- 

 cluded between the outer and inner compact layers of bone is termed the ' diploe' : it is most 

 abundant in the basioccipital and at the bases of the alisphenoids, and is traceable throughout 

 the frontals and parietals, but is absent in the greater part of the squamosal. The cells in 

 the body of the sphenoid are much larger, and have received air. The mechanical application 

 of the squamosals as buttresses, applied against the alisphenoids and parietals, is well shown 

 in this section. 



Hunterian. 



5x 



