88 



THE VERTEBRATE SKELETON. 



B 



,8 



18 



FlG. 9. A. DORSAL AND B. VENTRAL VIEW OF THE CRANIUM OF A SALMON 



(Salmo solar) from which most of the membrane bones have been 

 removed (after PARKER). Cartilage is dotted. 



1. supra-occipital. 



2. epi-otic. 



3. pterotic. 



4. sphenotic. 



5. frontal. 



6. median ethmoid. 



7. parietal. 



8. lateral ethmoid. 



9. para sphenoid. 



10. vomer. 



11. exoccipital. 



12. opisthotic. 



13. alisphenoid. 



14. orbitosphenoid. 



16. foramen for passage of an 



artery. 



17. pro-otic. 



18. articular surface for hyo- 



mandibular. 



II. VII. IX. X. foramina for the 

 passage of cranial nerves. 



