PLATS VI. 



FORMED MATERIAL OF EPITHELIUM AND CARTILAGE, SHOWING THE 



MODE OF ITS FORMATION, AND ITS RELATION TO THE 



BIOPLASM OF THE TWO TISSUES. 



Fig. 2. 

 Fig. 1. 



^fxttrs 8 !? ' 

 w|^^ 



fe l?rtn! 



Superficial or older cells of the conjunctiva 

 of a girl, showing formed material belong- 

 ing to each mass of bioplasm, giv.: 

 to the apcenrance of separate cells 





Youngest epithelium from the deep layer of the 

 conUiucuva(the membrane covering the front of 

 i he eye) beneath the layer represented in fig. 1. 

 showing the formed material continuous and not 

 vet separated into portions corresponding to each 

 mass ot bioolitam. Here there, are HO " separate 

 cells." x 600. 



*'ig. 3. 



verv tliin section of cartilage (sternum) of a young newt, showing masses of bioplasm, some of 



hict i are dividing as at a, b, c; with formed material, which is continuous tnroughout as in young 



epithelium, fig. '2. X tOO. 



_ x 5CO. 



fTo face page 222. 



