58 



A MANUAL OF ANATOMY 



ridges intersect there is the internal occipital protuberance. The 

 upper half of the longitudinal ridge gives attachment to a portion of 

 the falx cerebri, and is marked by a groove for the superior longi- 

 tudinal venous sinus, this groove being confined to one side of it, 

 usually the right. The lower half is sharp and wiry, and is called the 

 internal occipital crest. It gives attachment to the falx cerebelli, 



Upper or Interparietal part 

 of Tabular Portion 



External Occipital Crest 



Highest Curved Line ,^ 

 Complexus 



Rectus Capitis 

 Posticus Minor^s 



Obliquus 

 Capitis 

 Superior 



Rectus Capitis 

 Posticus Major 



Rectus Capitis 



Lateralis 



Posterior Condylar Fossa and 

 Foramen (latter inconstant) ' 

 Anterior Condylar P'oramen 

 Rectus Capitis Anticus Minor ■' 



Rectus Capitis Anticus Major 



External Occipital Protuberance 

 ' Trapezius 



• Superior Curved Line 



/\ii\ U^> Inferior Curved Line 

 ^7v\™Bi11 . /^/Occipitalis 



Stemo-cleido-mastoic 



Splenius Capiti 



Lateial AngL 



Inferior Lateral 



Border of 

 Tabular Portion 



Jugular Process 



Jugular Notch 

 Condyle 



Pharyneeal Tubercle on 

 Basilar Process 



Fig. 39. — The Occipital Bone (External View). 



and is occasionally grooved for the occipital venous sinus. Near 

 the foramen magnum it divides into two parts, which diverge as 

 they pass to that opening, and enclose between them the vermiform 

 fossa, which receives a part of the vermiform process of the cere- 

 bellum. The transverse ridge gives attachment to the tentorium 

 cerebelli, and is deeply grooved along each half for the lateral venous 

 sinus. On one side of the internal occipital protuberance, usually 



