340 NORMAL HISTOLOGY AND ORGANOGRAPHY. 



changes to that of the particular race to which the 

 child belongs. 



The strata lucidum and granulosum are two thin 

 layers that lie between the cortieum and the Mal- 

 pighian layers and are best developed in the sole of 

 the foot and the palm of the hand. Each consists 

 of two or three rows of epithelial cells. The stratum 

 lucidum overlies the stratum granulosum and is a 

 refractive layer consisting of cells with disintegrating 



J-^ ^j=i_ - 1__^~. t!~r=r = '-^2^,' Corncum or horny layer. 



Stratum lucidum. 

 Stratum granulosum. 



Malpi^hian or germinal 

 layer. 



Fig. 242. Section of epidermis of skin from palm surface of finger. 



nuclei, and possessing a homogeneous substance 

 called eleidin. The latter is colored with eosin but 

 does not take nuclear dyes. The cells that compose 

 the stratum granulosum possess many granules 

 called keratohyalin granules, which are regarded as 

 products of cell disintegration. These granules in- 

 crease in size and coalesce to form the semifluid sub- 

 stance called eleidin of the stratum lucidum. The 

 granules take nuclear dyes; the eleidin does not. 



