LIST OF ILLUSTRATIONS. XXVU 



FIG. PAGE 



186. Ovary with Graafian follicle ruptured . . . . .568 



187. Graafian follicle, ruptured and filled with blood . . . 577 



188. Corpus luteum, three weeks after menstruation . . . 578 



189. Corpus luteum, four weeks after menstruation . . . 579 



190. Corpus luteum, nine weeks after menstruation . . . 579 



191. Corpus luteum of pregnancy, at end of second month . . . 582 



192. Corpus luteum of pregnancy, at end of fourth mouth . . . 582 



193. Corpus luteum of pregnancy, at term ..... 583 



194. Segmentation of the vitellus . . . . . .587 



195. Impregnated egg, showing embryonic spot .... 590 



196. Impregnated egg, showing two layers of blastodermic membrane . 591 



197. Impregnated egg, farther advanced ..... 591 



198. Frog's egg, at an early period . . . 592 



199. Egg of frog, in process of development ..... 592 



200. Egg of frog, farther advanced ...... 592 



201. Tadpole, fully developed . . . . . .593 



202. Tadpole, changing into frog ...... 594 



203. Perfect frog ........ 594 



204. Egg of fish ........ 596 



205. Young fish, with umbilical vesicle ..... 597 



206. Human embryo, with umbilical vesicle .... 597 



207. Fecundated egg, showing formation of amniou .... 600 



208. Fecundated egg, showing commencement of allantois . . . 601 



209. Fecundated egg, with allantois nearly complete . . . 601 



210. Fecundated egg, with allantois fully formed .... 602 



211. Egg of fowl, showing area vasculosa ..... 603 



212. Egg of fowl, showing allantois, amnion, &c. . 604 



213. Human ovum, showing formation of chorion .... 608 



214. Compound villosity of human chorion .... 610 



215. Extremity of villosity of choriou ..... 611 



216. Human ovum, at end of third month ..... 612 



217. Uterine mucous membrane ...... 615 



218. Uterine tubules ........ 615 



219. Impregnated uterus, showing formation of decidua . . . 617 



220. Impregnated uterus, showing formation of decidua reflexa . . 617 



221. Impregnated uterus, with decidua reflexa complete . . . 617 



222. Impregnated uterus, showing union of chorion and decidua . . 619 



223. Pregnant uterus, showing formation of placenta . . . 620 



224. Foetal pig, with membranes ...... 622 



225. Cotyledon of cow's uterus . . . . . .622 



226. Extremity of foetal tuft, human placenta .... 624 



227. Foetal tuft of human placenta injected .... 625 



228. Vertical section of placenta . . . . . .626 



229. Human ovum, at end of first month ..... 630 



230. Human ovum, at end of third month ..... 631 



231. Gravid human uterus and contents ..... 632 



232. Muscular fibres of unimpregnated uterus .... 635 



233. Muscular fibres of human uterus, ten days after parturition . . 635 



234. Muscular fibres of human uterus, three weeks after parturition . 636 



235. Formation of cerebro-spinal axis ..... 637 



