20 



ELEMENTS OF HISTOLOGY. [Chap. in. 



of globular or elliptical granules of the nature inter- 

 mediate between protoplasm and keratin. Their sub- 



----^- j -r*-=^_-=^_^r^g -=^ stance is called 



eleidinbyRan- 

 vier, keratohy- 

 alin by Walde- 

 yer; these cells 

 form the stra- 

 tum granulo- 

 sum of Langer- 

 hans. Deeper 

 down the cells 

 are less flat- 

 tened and more 



Fig. 14.-From a Vert^Section through the 



a, The stratum Malpighii ; 6, the stratum granulosum 

 tum lucidum J * the stratum corneum. 



polyhedral, and 



the deepest 



form ft 



of more or esa 



columnar cells, placed vertically on the surface of 

 the subjacent corium. 



The substance of the 

 hairs, nails, claws, hoofs, 

 consists of horny scales. 

 (See chapter on Skin.) 



22. The stratified 

 pavement epithe- 

 lium (Fig. 15) lining the 

 cavity of the mouth, the 

 surface of the tongue, the 

 pharynx and oesophagus 

 of man and mammals, and 

 the anterior surf ace of the 

 cornea, &c, is as regards Fig 15 _ From 



the Style and arrange- 



ment of the cells, identi- 



, -,i,i 



Cal With the Stratum 

 mr i i c ,i -i 



Malpighii of the epider- 



Vertical gection 



through the anterior layers of the 



Coiaiea - 



a, : %he stratified pavement epithelium ; 

 ft, the substantia propria^ with the 

 corneal corpuscles between its lamella 



(Handbook.) 



