CoGHiLL, Skin of the Frog. 63 



fibers passing from the cell into the plexus; d, a typical ganglion cell; e, group 

 of fibers entering the plexus; /, ental gland; ^, ectal gland. 



Fig. 14. Section stained by the silver method, showing a typical chrom- 

 atophore in the ganglionic stratum at the base of the corium; a, chromatophore; 

 b, single ganglionic cell; c, a number of ganglion cells matted together. 



Fig. 75. "Section of the skin of the head of a toad (Bufo) after intra 

 vitam injection with methylene blue and fixation with Bethe's solution of molyb- 

 date of ammonia. Examined in glycerine. The section is somewhat oblique 

 so that the duct and part of the body of the gland is removed. The delicate 

 non-medullated fibers are seen "generausly distributed over the uncut surface of 

 the gland. Coarser fibers are also seen in th^ lower and upper plexuses, also a 

 bundle of sensory rods at the left." 



Fig. 16. "Intra vitam methylene blue preparation of skin of axolotl, show- 

 ing cell of the ganglionic meshwork beneath the corium with the epidermis, o, 

 fiber passing to cells of the intracellular reticulum ; b, non-medullated fibers 

 from a nerve piercing the corium ; c, ci, C2 and C3, ganglion cells of the plexus 

 beneath the corium." 



Note: Figures 15 and 16 were drawn by Prof. C. L. Herrick, and are re- 

 produced with their descriptions from Vol. VIII, Plate IX, of this Journal. 



