THE TEETH. 



615 



rupted, by light lines leading into the light net-work which pierces the 

 basis-substance between the canaliculi. The central fibers look very distinct 

 and dark violet in specimens stained with chloride of gold, and send slender, 

 conical, radiated offshoots through the surrounding dentinal canaliculi, 

 respectively, toward the mouth of the light interruptions in their walls. In 

 directly transverse sections, one, two, or sometimes even three, such offshoots 

 can be seen in a star-like arrangement. Each offshoot springs, with a broad 

 base, from the central dentinal fiber, while its pointed end always is directed 

 toward the perforation in the wall of the canaliculus, where, as a rule, it is 

 lost to sight. 



Toward the boundary between dentine and enamel, and dentine and 

 cementum, as is well known, the dentinal canaliculi ramify, and according to 

 their ramifications also the dentinal fibers bifurcate, becoming thinner the 

 nearer to the surface of the dentine. Both longitudinal and transverse sec- 





FIG. 262. ROOT OF MOLAE. STAINED WITH CHLORIDE OF GOLD. 



D, dentine ; C, cement, with plastids branching and uniting ; F 1 , dentinal fibers, with their 

 trail averse offshoots ; F*, ramification of dentinal fibers and their union with the offshoots of 

 cement-corpuscles. Magnified 1200 diameters. 



tions of this part of the dentine show details identical with the main mass of 

 the dentine, the only difference being that, near the periphery of the dentine, 

 the fibers are more delicate and more closely packed together. (See Fig. 

 263 A and Fig. 263 B.) 



In some teeth I have met, on the periphery of the dentine of the crown, 

 with the so-called " interglobular spaces" (Czermak), which may be consid- 

 ered as remnants of the embryonic condition of the dentine. They represent 

 lacunae of greatly varying sizes, bounded by curved lines, the convexities of 

 which are directed toward the central cavity. These spaces sometimes con- 

 tain bioplasson i. e., embryonal elements which have not been transformed 



