The occipital bone in Primates. 



81 



Simia Satyrus (young). Antero- posterior shortest distance 8.0 cms. Transverse 

 (angle to angle) 7.7 cms. Basilar ant. -post. 1.8 cms. Foramen antero- 

 posterior 3.0 cms. Transverse diameter of foramen 2.0 cms. Foramen to 

 summit 5.2 cms. 



Simia Satyrus (adult). Antero -posterior shortest, apparently 8.5 cms (?). Trans- 

 verse almost the same. Bone is defective. 



Anthropithecus Gorilla (engena). Antero-posterior shortest 10.3 cms. Transverse 

 9.5 cm. Basilar 3.0 cm (?). Foramen 2.7. Transverse foramen 2.5 cm. 

 Foramen to summit 5.9 cm. 



Tabular part flat in middle line for 

 4.5 cms, hollowed e?:ternal to this. 

 Distance between the condyles in 

 front 1.1 cms, and behind 6.6 cms. 

 Length of condyle 2.3 cms, breadth 

 1.3 cms. 



Fig. 13. 



Fig. 14. 



Anthropopithecus Gorilla. Antero-posterior 15 cms nearest. Transverse 15 cms. 

 Basilar 3.2 cms. Foramen 3.1. Basilar 3.2. Foramen 3.1. Trans, foramen 

 2.5 cms. Distance between condyles in front 1.4 cms and behind 4 cms. 

 Suture between Parietal and occipital obliterated near crest. The occipital 

 bone is less convex at the middle near the foramen, than in the orang-outan 

 one may take a Papuan for Comparison. 



Homo (Papuan). Antero-posterior shortest 12.5 cms. Transverse 10,1 cms. Basi- 

 lar 2.5, Foramen magnum 3.7 cms. Transverse foramen 2.5 cms. Foramen 

 margin to the occipital protuberance 6. Protuberance 6 cms. Protuberance 

 to the anterior angle 5.3 cms. Distance between Condyles in front 0.9 cms. 

 Behind 3 cms. Length of Condyle 2.6 cms, broadest part 1.3 cms. The 

 two Condyles are somewhat constricted at the middle. 



A tliird (3^<^) Condyle is present on the basilar process of 

 this Papuan. It is situated close to the foramen magnum. The 

 articular surface is round or circular and is 0.7 cms in diameter. 

 This Condyle is smaller than that figured by Kollmann on the Skull 

 mentioned in his paper in the Anatomischer Anzeiger (1907). The 



Internationale Monatsschriit f. Anat. u. Phys. XXVII. 6 



