64 THE TONER LECTURES. 



does not so attain, the malar eaters iuto the composition of the fis- 

 sure. (See p. 11.) 



The connection which exists between nutritive processes and 

 grooves caused by the positions of blood vessels is considered on 

 page 70. It becomes difficult at times to decide which is the most 

 effective in inducing the position of sutures. For example : While 

 the masseteric ridge answers in position to the intermalar suture, it 

 also corresponds to the position of a vessel groove. The groove is 

 commonly seen in the immature skull. It is, however, conspicuous 

 in the skull of an adult idiot.^ 



In ilhistration of the fad that nutrition of bone is apt to be in- 

 fluenced by the position of sutures the following may be mentioned : 

 Nodules of a size of a millimetre, sessile in form and of hard con- 

 sistence, are occasionally seen on the frontal bone near the median 

 line. They are to be attributed to localized hyperostoses in the 

 neighborhood of the interfrontal suture.^ 



The frontal bone directly in advance of the coronal suture is 

 often the seat of a convexity only secondary in height to the frontal 

 eminence. It is especially well developed in Peruvian crania. A 

 second eminence, more generally distributed, is seen on the same 

 bone in the temporal fossa, directly below the temporal ridge.^ 



The coronal suture is deflected forward slightly as it is crossed 

 by the temporal ridge. In 31 out of the 6-1 skulls of negroes ex- 

 amined the suture extended parallel to the ridge for about two 

 centimetres before it crossed it. In no other skull, save in a Semi- 

 nole Indian* and a Carib,^ was a similar peculiarity noticed. It 

 thus becomes a character which should be sought for in describing 

 the cranium of the negro. (See Vertex, p. 53.) 



The borders of muscular impressions, such as the temporal ridge 

 is to the impression for the temporal muscle, may be said to modify 



iNo. 1190, German, A. N. S. 



2 No. 10.35, Apache; 742, Mandan ; 647, and three Peruvians. 



=• This is well seen in 316, a young Malay ; 1029, Fiji ; and 44, Menominee. 



* No. 708, Academy of Natural Sciences. ^&92, ibid. 



