BY N. DE MIKLOUHO-MACLAY. 403 



Some additional measures of the cranium. 

 Sagittal length of the frontal bone, from the transverse suture of 



the union with the nasal bone to the coronal suture... 135 mm. 

 Sagittal length of the parietal bone, or more correctly, length of 



the obliterated sagittal suture 146 mm. 



Sagittal length of the occipital bone from the lambdoid suture to 



the posterior margin of the foramen magnum about (because 



this margin is defective) ... ~ 122 mm. 



Total horizontal circumference 538 mm. 



Minimum frontal diameter 88 mm. 



Maximum frontal diameter above the Pterion 102 mm. 



Maximum parietal breadth 119 mm. 



Diameter between the ridges of the mastoid process 122 mm. 



Explanation of Plate 19. 



Pig. 1. — Side view of a skull of an Australian aboriginal from 

 Queensland (B. 1 ., of the Craniological Collection of the Australian 

 Museum in Sydney), represented one-half of nat. size. 



The nasal bone, the lower part of the sup. maxillary bone, the 

 Zygoma and the inferior Maxilla are wanting. The bones of the 

 face of the other side are completely broken off. 



o. p. — Ophryon or supraorbital point. g. — Glabella. 



p. t. — Pterion. 



b. g. — Bregma (point of junction of the sagittal and lambdoid 

 sutures.) 



b. s. — Basion (middle of the anterior margin of the foramen- 

 magnum. 



p. m. — Mastoid process. 



o. — Occipital point (the point of the occiput in the mesial plane 

 most removed from the Ophryon.) 



t. — Tnion (external occipital protuberance) 



z. — Zygoma broken off above the glenoid fossa. 



c. 1. — Sup. curved line. 



Fig. 2. — View of the same skull from above. One-half nat. 

 size. The sagittal suture is completely obliterated. 



Fig. 3. — View of the same skull from behind (one-half nat. size.), 

 to show the well pronounced roof shaped form of the cranium. 



