1 6 ILLUSTRATIONS. 



FIG. PAGE 



323. Section of alveoli from sebaceous gland of human scalp (Huber) 399 



324. Model of small portion of a secreting mammary gland 400 



325. Section of mammary gland of nullipara (Nagel) 401 



326. Transverse section through human skin 404 



327. Cross-sections of human spinal cord 407 



328. Schematic diagram of spinal cord in cross-section (von Lenhossek) 409 



329. Schematic cross-section of spinal cord (Ziehen) .. 410 



330. Section through human cerebellar cortex vertical to the surface of the convolution 413 



331. Schematic diagram of cerebellar cortex 414 



332. Cell of Furkinje from human cerebellar cortex 415 



333. Granular cell from the granular layer of the human cerebellar cortex .... 415 



334. Vertical section of human cerebral cortex 418 



335. Large pyramidal cell from human cerebral cortex 419 



336. Schematic diagram of cerebral cortex 420 



337. Olfactory bulb 422 



338. Longitudinal section of spinal ganglion of cat (Huber) 424 



339. Ganglion cell from the Gasserian ganglion of a rabbit (Huber) 425 



340. Diagram showing the relations of the neurones of a spinal ganglion (Dogiel) 426 



341. Neurone from inferior cervical sympathetic ganglion of a rabbit (Huber) . . 427 



342. From section of semilunar ganglion of cat (Huber) 428 



343. From section of stellate ganglion of dog (Huber) 429 



344. From section of sympathetic ganglion of turtle (Huber) 430 



345. From section of sympathetic ganglion of frog (Huber) 430 



346. Schematic diagram of a sensorimotor reflex arc according to the modern neu- 



rone theory 431 



347. Schematic diagram of a sensorimotor reflex cycle 432 



348. Schematic diagram of the reflex tracts between a peripheral organ and the 



brain cortex . 433 



349. Neurogliar cells ( Huber) 434 



350. Neurogliar cells from cross-section of the white matter of the human spinal 



cord (Huber)- ... 436 



351. Section through injected cerebral cortex of rabbit 438 



352. Schematic diagram of the eye (Leber and Flemming) 447 



353. Section through the anterior portion of human cornea 449 



354. Corneal spaces of dog > 450 



355. Section through the human choroid 452 



356. Meridional section of the human ciliary body 454 



357. Injected blood-vessels of the human choroid and iris 456 



358. Section of the human retina 458 



359. Section through point of entrance of human optic nerve 460 



360. Section through human macula lutea and fovea centralis 461 



361. Schematic diagram of the retina (Ramon y Cajal) , 463 



362. Injected blood vessels of the human retina 465 



363. Injected blood-vessels of human macula lutea 466 



364. Vertical section of upper eyelid of man . . 471 



365. Meibomian or tarsal gland, reconstructed after Bern's wax-plate method . . . 472 



366. Schematic representation of the complete auditory apparatus (Schwalbe) . . 477 



367. Cross-section of the Eustachian tube 479 



368. Right bony labyrinth (Quain, after Sommering) 480 



369. Membranous labyrinth from five-month human embryo (Schwalbe, after 



Retzius) 481 



370. Transverse section through an osseous and membranous semicircular canal of 



an adult human being 482 



371. Vertical section through the anterior ampulla . . 484 



372. Longitudinal section of the cochlea of a cat 486 



373. Section through a turn of the osseous and membranous cochlear duct of the 



cochlea of guinea-pig 4^7 



374. Organ of Corti (Retzius) 490 



375. Surface of organ of Corti, with surrounding structures (Retzius) 493 



376. Scheme of distribution of blood-vessels in labyrinth (Eichler) ...... 495 



377. Portion of transverse section of the olfactory region of man 499 



