EXPLANATION OF THE PLATES. 



PLATE XXXIX. 



STRUCTURE OF TENDONS, TEETH, AND FIBROUS TISSUE. 



Fig. 1. Longitudinal section of a tendon, showing the pre- 

 sence in it of nucleated fibres of elastic tissue ; these 

 are best seen after the application of acetic acid, 

 but may be clearly recognised without the employ- 

 ment of that re-agent. 670 diameters. 



2. Transverse section of same, from which it becomes 



evident that the fibres are branched. 



3. Vertical section of enamel, magnified 220 diameters. 



The enamel cells thus lowly magnified give the 

 section a fibrous appearance. 



4. A portion of enamel magnified 670 diameters, and 



showing the enamel cells still more clearly. 



5. Transverse section of enamel, showing the hexagonal 



form of the enamel cells. 



6. Inelastic fibrous tissue magnified 670 diameters. 



7. Mixed fibrous tissue : the threads of the elastic fibrous 



tissue may be recognised by their tortuous course 

 and more defined outline. 



r3 



