LIST OF ILLUSTKATIONS X J X 



FIQTJRE PAGE 



298. From the lung of a child 315 



299. From the lung of a dog whose blood vessels had been injected with 



a gelatinous mass, and appear black 316 



300. From the central portion of figure 299 317 



301. From a section through the lip of an infant . . . __,_ 321 



302. Axial section of a human molar tooth . . . . . 322 

 303. Diagram of an axial ground section of tooth, showing the several 



stripes of the dentin and the enamel ..... 323 

 304. From a longitudinal section of the neck of a child's tooth and the 



adjacent alveolus 324 



305. From a section of a human tooth which had been ground to extreme 



thinness .......... 325 



306. Section of fang parallel to the dentinal tubules, human canine . 326 

 307. Dentin from a ground section of a human molar, showing the den- 

 tinal tubules cut across ....... 327 



308. Enamel prisms in transection ....... 328 



309. A group of enamel prisms cut longitudinally, from the incisor tooth 



of the rat, showing their irregularly beaded character and the cross 



striations 329 



310. From a section of a human tooth which had been ground to extreme 



thinness 330 



311. Developing tooth from a human embryo 17 mm. long . .331 



312. Dental anlages from a human fetus 40 mm. long . . . 332 

 313. Two stages in the early development of the teeth, from a 25 mm. pig 



embryo 332 



314. Developing tooth from a human fetus 30 cm. long . . . 333 



315. A developing tooth from an infant's jaw . . - . . 334 



316. A portion of Fig. 315, near the apex of the developing tooth . 335 



317. Odontoblasts and dentin of the tooth of a new-born cat . . 336 

 318. View of dorsum of tongue, showing the various papillae, the tonsils 



and the fauces 338 



319. One lateral half of a coronal section of a dog's tongue . . . 339 



320. Filiform papillae of the dog's -tongue . ... 340 

 321. A filiform and a fungiform papilla, from an injected specimen of 



tongue of cat ......... 341 



322. Circumvallate papillae of the human tongue .... 342 



323. Two foliate papillae from a rabbit's tongue, showing numerous 



taste buds along their lateral margins 343 



324. Diagram of the alimentary canal of man 345 



325. Surface view of Auerbach's intramuscular nerve plexus, from the 



esophagus of a cat 346 



326. Photomicrograph of a transverse section through upper third of cat's 



esophagus . . 349 



