THE VISCERAL AFFERENT DIVISION. 175 



DEMONSTRATION OR LABORATORY WORK. 



1. Review the dissections called for in Chapter V, Nos. i and 2 

 with reference to the visceral nerves and the visceral lobe in the brain. 



2. Study the taste buds in sections of young fry of bony fishes, in 

 frog tadpoles, and in the mammalian tongue. 



3. In haematoxylin or Weigert sections of the brain of a bony fish, 

 selachian or frog, study the sensory roots of the X, IX and VII nerves 

 and the formation and course of the fasciculus communis. 



4. Study the endings of visceral sensory fibers and the types of 

 cells in the vagal and facial lobes in sections of the fish brain prepared 

 by the method of Golgi. 



5. The secondary and tertiary gustatory tracts and the secondary 

 nuclei are best studied in Golgi and Weigert sections in the brains of 

 teleosts, ganoids or selachians. 



LITERATURE. 



Cajal, S. R. : Beitrage zum Studium der Medulla oblongata. Leipzig. 1896. 



Gushing: The Taste Buds and their Independence of the N. trigeminus. 

 Johns Hopkins Hospital Bulletin, Vol. 14. 1903. 



Dohrn, Anton: Studien zur Urgeschichte des Wirbelthierkorpers. No. 

 XIII. Mitth. Zool. Sta. zu Neapel. 1888. 



Gaskell, W. H.: On the Structure, Distribution and Functions of the 

 Nerves which innervate the Viscera and Vascular Systems. Jour, of Physiol., 

 Vol. 7. 1886. 



Herrick, C. Judson: The Cranial Nerves and Cutaneous Sense Organs 

 of North American Siluroid Fishes. Jour. Comp. Neur., Vol. n. 1901. 



Herrick, C. Judson: The Organ and Sense of Taste in Fishes. Bull. 

 U. S. F. C. 1902. 



Herrick, C. Judson: On the Phylogeny and Morphological Position of 

 the Terminal Buds of Fishes. Jour. Comp. Neur., Vol. 13. 1903. 



Herrick, C. Judson: The Central Gustatory Paths in the Brains of Bony 

 Fishes. Jour. Comp. Neur. and Psych., Vol. 15. 1905. 



Johnston, J B.: The Brain of Petromyzon. Jour. Comp. Neur., Vol. 12. 

 1902. 



Johnston, J. B.: The Cranial Nerve Components of Petromyzon. Morph. 

 Jahrb., Bd. 34. 1905. 



Johnston, J. B.: The Radix mesencephalica trigemini. Ganglion isthmi. 

 Anat. Anz., Bd. 26. 1905. 



Onuf and Collins: Experimental Researches on the Central Localization 

 of the Sympathetic with a Critical Review of its Anatomy and Physiology. 

 Arch. Neur. and Psychopath., Vol. 3. 1900. 



Schaffer, Jos.: Ueber das Epithel des Kiemendarms von Ammocoetes nebst 

 Bemerkungen iiber intraepitheliale Driisen. Arch. f. mik. Anat. Bd. 45. 1895. 



