PLATE III. 



Figs. 8 and 9. Transverse sections throngh the cranium of Amia calva in the region 

 of the nasal pits. Fig. 8 the anterior section, and they follow in sequence 

 through Fig. 12. The sections are diagrammatic; with the cartilaginous 

 parts stippled. (After Sagemehl.) Copied by Mr. H. L. Todd. 



Figs. 10, 11, and 12. Similar sections through tpe region of the optic foramen, tlie 

 facial foramen, and the labyrinth region just anterior to the foramen for the 

 glossopharyngeal, respectively. (After Sagemehl.) Copied by Mr. Todd. 



Fig. 13. Posterior view of the cranium of the same specimen of Amia calva. Life size. 

 (After Sagemehl.) Copied by Mr. Todd. 



Fig. 14. Three vertebrae of Amia calva, magnified about three times, showing the 

 method of articulation of the neural spines and the facets for the ribs. 

 (After Franque.) Copied by Mr. Todd. 



Fig. 15. Left lateral view of mandible of a Teleostean fish (Microjpterus salmoides). 

 Life size. Drawn by the author from his own dissections. The various 

 bones pulled ^.part to show their entire shape. 



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