LIST OF ILLUSTRATIONS x j x 



FIGURE PAGE 



298. From the lung of a child . . .315 



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



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 ....... 



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



320. Filiform papilla? of the dog's tongue . . 340 

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



tongue of cat ..... . 341 



322. Circumvallate papillse of the human tongue . 342 

 323. Two foliate papillse 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 



