XVI 



LIST OF WOODCUTS. 



PIGtJBS PAGE 



288. Liver of human germ . 342 



289. Nail-tissue . . .362 



290. Intestinal epithelium . 362 



291. Jelly-like tissue . .363 



292. Cartilaginous tissue . 363 



293. Neuro-inuscular cells . 364 



294. Nerve-tissue . . . 364 



295. Muscle-tissue . . .. 364 



296. Vascular tissue . . 365 



297. Blood-cells . . .365 



298. Blood-vessels of a Worm . 371 



299. Head with blood-vessels 



of Fish. . . .375 

 300-302. Arterial arches . ,377 

 303-306. „ „ . 378 



307-310. Development of the 



heart .... 380 

 311-314. Development of the 



heart . . . .382 

 315. Transverse section 



through Haliphysema . 393 



316. Eudiments of Urogmitalia 400 



317. Primitive kidney of Bdello- 



8toma ... 406 



318. Earliest primitive kidney 



rudiments . . . 408 



319. 320. Primitive kidneys of 



Mammals . . . 409 

 321. Development of urogeni- 

 tal system . . . 414 

 322,323. „ „ 415 



324-326. „ „ 416 



327. Female sexual organs of 



Beaked Animal (Orni- 

 thorhynchus) . . .418 



328. Change of position of both 



kinds of sexual glands 



in human beings . . 420 



329. Development of the human 



external sexual organs 422 



330. Human egg-folliclea . 426 



