122 NERVOUS SYSTEM OF VERTEBRATES. 



sections of a fish, frog or mammalian brain. Note its relations with 

 the dorsal tracts of the cord, and the relations of the substantia 

 gelatinosa of medulla oblongata and cord. 



4. In Weigert sections of the brain of a selachian or frog, look for 

 the sensory fibers of the trigeminus running to the tectum mesencephali 

 and to the cerebellum. 



5. Study the nerve elements in the dorsal horn, acusticum, sub- 

 stantia gelatinosa and cerebellum in Golgi sections of the fish brain. 



6. Trace the ascending lemniscus in fish, frog or mammal in trans- 

 verse or sagittal sections by the method of Weigert. 



LITERATURE. 



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



Cajal, S. R.: Textura del sistema nervioso del Hombre y de los Verte- 

 brados. Madrid. 1904. 



Coghill, G. E.: The Cranial Nerves of Amblystoma tigrinum. Jour. 

 Comp. Neur., Vol. 12. 1902. 



Cole, F. J.: On the Cranial Nerves of Chimaera monstrosa Linn., etc. 

 Trans. Roy. Soc. Edinb., Vol. 38. 1896. 



Cole, F. J.: Observations on the Structure and Morphology of the 

 Cranial Nerves and Lateral Sense Organs of Fishes, with especial reference 

 to the Genus Gadus. Trans. Linn. Soc. London, Ser. 2, Zool. 7. 1898. 



Herrick, C. Judson: The Cranial and First Spinal Nerves of Menidia. 

 Jour. Comp. Neur., Vol. 9. 1899. 



Herrick, C. Tudson: A Contribution upon the Cranial Nerves of the 

 Codfish. Jour. Comp. Neur., Vol. 10. 1900. 



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

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



Johnston, J. B.: The Brain of Acipenser. Zool. Jahrb., Abth. f. Anat. u- 

 Ontog., Bd. 15. 1901. 



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 Cranial and Spinal Ganglia and the Viscero-motor 

 Roots in Amphioxus. Biol. Bull., Vol. 9. 1905. 



Kappers, C. U. A.: The Structure of the Teleostean and Selachian 

 Brain. Jour. Comp. Neur. and Psych., Vol. 16. 1906. 



Kingsbury, B. F.: The Structure and Morphology of the Oblongata in 

 Fishes. Jour. Comp. Neur., Vol. 7. 1897. 



Locy, W. A. : On a newly recognized Nerve connected with the Fore- 

 brain of Selachians. Anat. Anz., Bd. 26. 1905. 



