BIBLIOGRAPHY OF THE TEETH. 493 



the maxillary mucous membrane. To judge from his de- 

 scription and illustrations, Herissant '(3) must have already 

 seen the papillae, which he considered to be glands for the 

 secretion of enamel. Their importance in the formation of 

 enamel has not been sufficiently estimated. Most of the 

 contested points await their elucidation from an accurate 

 knowledge of the histogenesis of the dentine and of the 

 enamel. Kolliker (58),with whom Hertz (52) is in accordance, 

 so far as regards the dentine, and Kollmann (67a), in regard 

 to the enamel, still considers both substances as a hardened 

 excretion of the odontoblasts or enamel cells ; whilst Tomes, 

 Hertz, and Wenzel (66) (in the continuously growing incisors 

 of Rodents), in regard to the enamel, and Boll recently in regard 

 to the dentine, agree with the view given in the text. Kollmann 

 admits also a membranous investment to the free ends of the 

 enamel cells ; this continuous layer forms the membrana praefor- 

 mativa, and at a later period, when calcified, the cuticula dentis. 

 In the following account of the literature of the subject, 

 besides the most recent works, only those are mentioned which 

 have given either extended and complete descriptions, or have 

 furnished some new facts. References to the older literature 

 are well given in He'rissant, Henle (26) and Robin, and Magitot. 



LITERATURE. 



1. MALPIGHI, Anatome plantarum. Lugd. Batav., 1687. 



2. LEEUWENHOEK, Philos. Transact., 1678. Opera omnia. Lugd. 



Batav., 1722, T. i. 



3. HERISSANT, Nouvelles recherches sur la formation de 1'email des 



dents et sur celle des gencives. Mem de 1'Acad. de Paris, 1754. 



4. J. HUNTER, The natural history of the teeth. London, 1778. 



Deutsch, Leipzig, 1780. 



5. BLAKE, De dentium formatione et structura. Edinburgh, 1798. 



6. TENON, Mem. de 1'institut national, An vi. 



7. SCHREGER, ISENFLAMM'S und ROSENMULLER'S Beitrage, 1800. 



8. SERRES, Essai sur 1'anatomie et la physiologic des dents. Paris, 



1817. 



9. HEUSINGER, Histologie, 1822. (Hornzahne.) 



10. F. CUVIER, Des dents des Mammiferes considerees comme cha- 

 racteres zoologiques. Paris, 1825. 



M M 2 



