A CLINICAL STUDY OF THE SKULL. 65 



the bone itself, and may even lead to the separation of the bone in 

 two parts. This is apparently the case in the instance of a double 

 parietal bone as figured by Professor Turner in the skull of an Ad- 

 miralty Islander.^ The line of origin on the inner sui-face of the 

 malar bone answers to the position of the suture in two instances of 

 double malar bone which I have studied.^ In four crania'^ traces of 

 a suture were seen on the maxillary portion of the hard palate ex- 

 tending obliquely forward and outward at or near the maxillo-pal- 

 atal junction. They may unite w'ith the junction last named at the 

 median line or lie a little to the ectal side. 



The squamosal suture (pafieto-temporal) ends posteriorly at the 

 mastoid process somewhat abruptly. A process of the suture is apt 

 to be directed upward and backward from the hinder part of this 

 suture on the level of the temporal vein-groove. Although small, 

 the pi'ocess practically limits the squamosal region in this direction, 

 since the curves which are continuous with the tuber of the parietal 

 bone here begin. The slope from the side of the skull to the occi- 

 put is also announced.* 



THE SUTURE BETWEEN THE INFRA-ORBITAL FORAMEN 

 AND THE INTERIOR MARGIN OP THE ORBIT, INCLUD- 

 ING VARIATIONS OF THE LATTER. 



An interesting region for variation is seen in the inferior border 

 of the orbit. The border may be said to lie below a curved line 

 which is continued across the orbit along the upper limit of the 

 zygoma. The bones which enter into the composition of the border 

 are the malar and the superior maxilla. 



The malar comprises the outer half, nearly, of the border. As a 

 rule, the anterior limit reaches a point about 4°^ from the infra- 

 orbital canal, but in place of this it may end over the canal, or may 

 reach the ascending process of the maxilla. 



1 The Challenger Rep. X, 57. « 1255, Ostrogoth; and 130, Chinese. 



3Nos. 20, 60, 80, 136, 139, College of Physicians. 

 *See 1482 (A. N. S.), Peruvian, right side 



5 T 



