paroccipital [3], parotic [4], and supra-occipital [5] rami. 

 The body is a short stout triangular bar of bone from which 

 condylar and paroccipital rami spring inferiorly, the former 

 extending backwards, the latter laterally, from the upper 

 end the supraoecipital ramus extends medially, the paretic 

 laterally and downwards. The three surfaces of the body 

 are cerebral [fig. 49] acustico-jugular [GJ and external [7]. 

 The hypoglossal canals [8] perforate the body, from cerebral 

 to external surfaces. Inferiorly the surface for articulation 

 with the basioccipital extends over the whole of this aspect 

 of condylar and paroccipital rami [9]. Laterally this last 

 ramus articulates with the pterygoid [10]. The parotic 

 ramus articulates with the opisthotic, this opisthotic sur- 

 face [11] is on the anterior aspect of the ramus, and is not 

 defined from the supraoecipital surface [12] on the antero- 

 superior margin of the supraoecipital ramus. Below the 

 external apertures of the hypoglossal canals the curved 



forms the upper half of the paroccipital fossa in the articu- 

 lated skull. The condylar facet [14], extends round some- 

 what on to the side of the condylar ramus. 



The Supraoccipital (Os occipitalc superius) [Figs. 26 

 and 27] is an arch-like bone, with a remarkably large 

 laterally compressed plate of bone [1] standing up and back 

 from the centre of the arch. The surface [2] for articula- 

 tion with the parietals occupies the whole of tin- dorsal 

 e<\gc of the crest, and extends down the lateral a<|M-et of 

 the bone along the anterior border. The plates forming 

 the arch are thickened below in the region where the 

 epiotic bones have become incorporated with them (jmrs 

 epiotica) [3]. The free margin of the epiotic portion 

 articulates, by synchondrosis, with the prootic in front [4] 

 and the opisthotic behind [5]. From the inner side of this 

 margin in the middle of its length a small plate of bone 



