EXPLANATION OF THE PLATES. 



PLATE XXIII. 



The figures in this plate are human, and are magnified 1 30 diameters. 



Fig. 1. Upper surface of epidermis, raised by means of a 

 blister from over the region of the heart of a 

 woman : it exhibits the cellular constitution of the 

 epidermis, the papillae and apertures of the sebaceous 

 and sudoriferous glands. 



Fig. 2. The under surface of the same, exhibiting the infun- 

 dibuliform processes of the epidermis sent down to 

 the sebaceous and sudoriferous glands. 



Y 2 



