62 Journal of Comparative Neurology. 



DESCRIPTION OF PLATES IV AND V. 



PLATE IV. 



Fig. I . Section of skin fixed in the chrom-acetic acid solution and stained 

 by the Weigert method, showing the terminal cells (a) in continuity with fibers 



(b) passing through the corium. 



Fig. 2. Section of the same showing terminal fibers (a) connecting with a 

 bundle (b) beneath the corium, also ental gland (c) showing partially the tunic 

 of muscle cells. 



Fig. 3. Teased preparation of skin stained intra vitam with methylene 

 blue, showing structure of the nerves passing to the terminal cells. Fiber at a. 



Fig. 4. Section through skin stained with methylene blue, showing ter- 

 minal cells (a) with fibers through corium. Other fibers appear in the middle 

 portion of the corium. 



Fig. 5. Section of same, showing course of fiber beneath the corium. The 

 fiber and its sheath are plainly distinguished throughout this extent. 



Fig. 6. Section stained by the silver method, showing nerve (a) passing 

 ectad through the corium and becoming obscured at the ental portion of the 

 Malpighian layer by a chromataphore (b). The ental part of the nerve (c) by a 

 less perfect impregnation is shown to extend beneath the corium for some 

 distance. 



Fig. J. Section fixed in Flemming's solution and stained by the Weigert 

 method, showing the periphery of a gland of the ental series with its envelope 

 of muscle cells (a); b, gland of theectal series; also terminal fibers at c. 



Fig. 8. A-E. Five consecutive sections stained by the Golgi method, 

 showing glands of the ental series (a) with enveloping fibers (b) from the plexus 



(c) at the base of the corium. Ectal glands at d. 



PLATE V. 



Fig. g. Section stained by the methylene blue method, showing tunic cell 

 at a, and nerve endings at b. 



Fig. 10. Similar section, showing nerves (a) passing to ental glands, with 

 typical endings at b\ c, blood vessel; d, nerve bundle. 



Fig. II. Section stained by the silver method, showing the structure of 

 the ganglionic plexus at the base of the corium; a, opaque central portion with 

 fibrous arrangement at the ental and ectal edges; 3, nerve bundles entering the 

 ental aspect of the plexus. 



Fig. 12. Section stained by the silver method, showing purely fibrous 

 structure of the plexus at the base of the corium; a, ganglion cell; b, nerve 

 bundle passing into the plexus and becoming obscured by a more densely stained 

 portion. 



Fig. 13. Section stained by the silver method, showing ganglion cells lo- 

 cated in the ectal portion of the corium; a, several cells matted together; b. 



