1907-8.] The Inca Bone : Its Homology and Nomenclature. 591 
South Australian Museum is one from Torres Strait, presented by the Chief 
Justice, the Right Honourable Sir Samuel Way. The skull had been pre- 
pared after the native fashion, and is evidently the skull of a native. It 
has a specimen of an inca bone, closely resembling the one in the aboriginal 
skull I have just described. It possesses an added interest in having 
several Wormian bones in the true lambdoid suture ( i.e ., the suture between 
the parietals and the inca bone), and in having a small bone, or two small 
bones, at the termination of the sagittal suture corresponding to what often 
passes for the interparietal or inca bone. 
From the fact that the membranous portion of the occipital bone is 
Fig. 3. 
developed from two centres, one would naturally expect that the inca bone 
might be found presenting the appearance of being bilaterally double, as in 
Bedard’s case quoted by Ward. In a skull that I received recently from 
New Caledonia from Dr Carter through Mr Maning, the Acting British 
Consul, the double character of the true inca bone is very apparent, although 
the various sutures of the skull are either very firmly knit or obliterated 
(fig. 3). The median suture of the inca bone in this kanaka skull is well 
marked ; the whole lambdoid suture (by lambdoid I mean the suture im- 
mediately posterior to the parietals) is fairly well outlined ; while the inner 
part of the suture between the right half of this bone and the occipital is 
almost obliterated. 
