3S Bull f tin of Laboratories of Denison University [Vol. xil 



nerve fibers than similar organs in a state of structural and 

 functional degradation. 



LITERATURE CITED. 



1902. Dunn, Elizabeth H. On the Number and on the Relation between 



Diameter and Distribution of the Nerve Fibers Innervating the Leg of 



the Frog, Rana virescens brachycephala, Cope. Journ. Comp. Neurol., 



XII, 4, 1902. 

 1899. Edgeworth, F. H. On the medullated fibers of some of the Cranial 



Nerves, and the development of certain Muscles of the Head. Journ. 



Anal, and Physiol., XXXIV, pp. U3-150. 

 1886. Gaskell, W. H. On the Structure, Distribution and Function of the 



Nerves which Innervate the Visceral and Vascular Systems. Journ. of 



Physiol., VII. 

 1889. Gaskell, W. H. On the Relation between the Structure, Function, 



Distribution and Origin of the Cranial Nerves, together with a Theory 



of the Origin of the Nervous System of Vertebrata. Journ. of 



Physiol., X. 

 1899. Herrick, C. Judson. The Cranial and First Spinal Nerves of Menidia; 



A Contribution upon the Nerve Components of the Bony Fishes. 



Journ. Comp. Neurol., IX, 3-4. 

 1901. Herrick, C. Jijdson. The Cranial Nerves and Cutaneous Sense Organs 



of the North American Siluroid Fishes, fourn. Comp. NeutoL, XI, 3. 

 1882. ScHWALBE, G. Ueber die Kaliberverhaltnisse der Nervenfasern. 



Leipzig. 



1888. Shore, Thos. W. The Morphology of the Vagus Nerve. Journ. Anal. 



and Physiol., XIII. 



1889. Shore, Thos. W. On the Minute Anatomy of the Vagus Nerve in 



Selachians, with Remarks on the Segmental Value of the Cranial 

 Nerves. Journ. Anal, and Physiol., XXHI. 



