JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE VL, 

 Illustrating Mr. Tomes's paper on Dental Tissues. 



Fig. 



1, — A section from a temporary tooth, in which the dentine (a) and the 

 enamel (b) have been removed by absorption, leaving the festooned 

 outline (c). 



2. — A section from the fang of a tooth, in which the dentine («) has 

 been removed, together with the cementum (c), and again made 

 good by the deposition of cementum. The appearance presented at 

 the junction of the dentine and cementum, where absorption has 

 not encroached upon the tissues at that point, is shown at (h). 

 The curved irregular lines in the cementum indicate the extent of 

 absorption at various periods, and the boundaries of the tissue 

 which has replaced the lost parts. 



3. — A section from a temporary tooth, the fangs of which have been 

 absorbed, and the crown hollowed out ; the enamel having been 

 partly removed, and both tissues coated over with new cementum. 

 (a), the dentine ; (b), the enamel ; (c), the cementum ; (d), the 

 junction of the absorbed surface of the enamel and new cementum. 



4. — A section of enamel, in which the centre («) has been ground 

 through ; (b), the enamel fibres, with their granular cells shown 

 faintly ; (c c), the sheaths of the enamel fibres. 



5. — A more highly magnified view from the same specimen, showing the 

 sheaths of the enamel fibres and their contents. 



6. — A transverse section of enamel, showing the sheaths of the fibres 

 with the contents removed. 



