EXPLANATION OF THE PLATES. 



PLATE LXIII. 



Fig. 1. Epidermis of palm of hand, magnified 40 diameters, 

 showing its disposition in ridges, and the apertures 

 of the sudoriferous glands. 



Fig. 2. Epidermis of the back of the hand, magnified to the 

 same extent, showing its furrows, hairs, and aper- 

 tures of sudoriferous ducts. 



Fig. 3. Papillae of palm of hand. Magnified 54 diameters. 



Fig. 4. Ditto of back of hand. Magnified to the same extent. 



Fig. 5. Epidermis of palm of hand, seen upon its under sur- 

 face, showing pits or depressions for the reception 

 of the papillae, and the ducts of the sudoriferous 

 glands. Magnified 54 diameters. 



Fig. 6. Epidermis of the back of hand, viewed upon its under 

 surface as a transparent object, and showing de- 

 pressions for the papilla3 and the ducts of the sudo- 

 riferous glands. Magnified 54 diameters. 



Fig. 7. Blood-vessels of the papillae of the palm of the hand, 

 a single loop corresponds to each papilla. Mag- 

 nified 54 diameters. 



Fig. 8. Ditto of the back of the hand. Magnified 54 diame- 

 ters. 



.*: 3 



