XXII LIST OF ILLUSTRATIONS. 



PAGE 



291. Tracheae of Dytiscus, . . . . . . 571 



292. Spiracle of Fly, . . . . V . . .572 



293. Spiracle of Larva of Cockchafer, . * - . . .572 



294. Foot of Fly, after Hepworth, . . . . . .577 



295. Foot of Dytiscus, . . \ *,-* . . 577 



296. Eggs of Insects, after Burmeister, ' .- - . . . .580 



297. Foot, with combs, of Spider, ,/>< 



298. Ordinary and glutinous threads of Spider, .... 583 



299. Minute Structure of Bone, after Wilson, .... 585 



300. Lacunae of Ditto, highly magnified, after Mandl, . . .586 



301. Section of Bony scale of Lepidosteus, .... 587 



302. Vertical Section of Tooth of Lamna, after Owen, . . .588 



303. Transverse Ditto of Pristis, ditto, ... 588 



304. Ditto Ditto of Myliobates, . . . .589 



305. Vertical Section of Human Tooth, after Mandl, ... 590 



306. Portion of Skin of Sole, . . .,< -. . . . .592 



307. Scale of Sole, . . . -.. - - *- ... 592 



308. Hair of Musk-Deer, . ruft.j . . . . .595 



309. Hair of Sable, . . .<-. .^-, ... 595 



310. Hairs of Squirrel and Indian Bat, . . . . .595 



311. Transverse section of Hair of Pecari, .... 595 



312. Structure of Human Hair, after Wilson, .... 596 



313. Transverse section of Horn of Rhinoceros, . ". < . . 598 



314. Blood-corpuscles of Frog, after Donne, . Y : ' . . . 599 



315. Ditto of Man, Ditto, . . . 599 



316. Fibrous Membrane of Egg-shell, . fc>i , . . . 603 



317. White Fibrous Tissue, ...... 603 



318. Yellow Fibrous Tissue, . . *rt* . v - . . 603 



319. Pigment-cells of Choroid, after Henle, 605 



320. Pigment-cells of Tadpole, after Schwann, . . . .606 



321. Ciliated Epithelium, after Mandl, . : . . ys . . 607 



322. Areolar and Adipose Tissue, after Mandl, . . .608 



323. Cartilage of Ear of Mouse, . *. * ... 609 



324. Cartilage of Tadpole, after Schwann, -i : -, . . . .609 



325. Striated Muscular Fibre, >. - V . . . 612 



326. Ultimate fibrilla3 of Ditto, . . . i v ' . . 612 



327. Capillary Circulation in Web of Frog's foot, after Wagner, . 618 



328. Intestinal villi of Monkey, . . . . . .622 



329. Various forms of Capillary network, after Berres, . . . 623 



330. Portion of Gill of Eel, . . ! ,,./. . . . . 624 



331. Interior of Lung of frog, ,. ... . . 624 



332. Section of Lung of Fowl, . . : ;- . . 625 



333. Section of Human Lung, ...... 626 



334. Microscopic organisms in Levant Mud, after Williamson, . . 630 



335. Ditto in Chalk from Gravesend, after Ehrenberg, 631 



336. Ditto Ditto from Meudon, Ditto . . 632 



337. Vertical section of Nummulite, . . v > v~> . 635 



338. Portion of Ditto, more highly magnified, -*- . . 636 



339. Horizontal section of Ditto, . . . -. ; w : - . 637 



340. Section of Orbitoides Prattii parallel to its surface, . . . 637 



341. Portions of Ditto, more highly magnified, . . ,' . 638 



342. Vertical section of Ditto, . . . . . .638 



343. Eye of Trilobtte, after Buckland, . . . -..-$ . 640 



344. Section of Tooth of Labyrinthodon, after Owen, . . . 641 



345. Crystallized Silver, ....... 645 



346. Oily Matter in Fibres of Brain (Todd and Bowman), . . .653 



347. Corpora Amylacea of Pineal Gland (Sieveking and Jones) , . 654 



348. Fatty Degeneration of Nerve-Fibre, ..... 654 



349. Striated Muscular Fibre, ...... 654 



350. Elongated Muscle-Cells (Non-Striated), . . . .656 



351. Sarcolemma, . . . . . ' . . 656 



