xiiv TABLE OF ILLUSTRATIONS. 



FIGS. 



407. Ovarium of the Eabbit 



408. Constituent parts of mammalian ovum, entire 



409. Constituent parts of mammalian ovum, ruptured 



410. Formation of the corpus luteum . . • • 



411. Generative organs of the Mare, isolated 



412. Generative organs of the Mare, in situ 



413. Termination of milk-duct in cluster of follicles 



414. Ultimate follicles of mammary gland, with secreting cells . 



415. Microscopic nppearance of milk 



416. Human uterus, with its appendages 



417. First stages in segmentation of mammalian ovum 



418. Later stages in segmentation . . . • 



419. Section tlirough embryo of the Chick, first day of incubation 



420. Plan of early uterine ovum .... 



421. Diagram of ovum at formation of the amnion . 



422. Exterior of the chorial sac. Mare .... 



423. Fecundated egg, showing formation of amnion and allantois 



424. Fecundated egg, with amnion nearly completed . 



425. Foetus of the Mare, with its envelopes. 



426. Portion of ultimate ramifications of umbilical vessels 



427. Portion of one of the foetal villi 



428. Equine foetus, opened on left side to show umbilical vessels 



429. Blood-vessels in liver of an equine foetus at mid-terra . 



430. Liver of a Lamb at birth ..... 



431. Diagram of an early human ovum 



482. Diagram of a human ovum in second month 



433. Early stages in the development of a Fowl 



434. Transverse section of embryo of Chick on third day 



435. Plan of development of eye .... 



436. Origin of encephalic centres in human embryo of sixth week 



437. Plan of chorda dorsalis at period of formation of embryo . 



438. Plan of vertebra at an early period of development 



439. Head of a foetal Lamb, showing Meckel's cartilage 



440. Plan of first system of vessels, embryo . 



441. Embryonic heart at an early period, anterior view 



442. Ditto, seen from behind .... 



443. Heart of an equine foetus ..... 



444. Plan of the aorta and its arches at an early period 



445. Plan of the circulation in the human embryo, side view 



446. First appearance of the lungs .... 



447. Embryo of Dug at twenty-five days 



448. Origin of liver from intestinal wall of embryo Chick . 



449. Urinary and genital apparatus in embryo Chick . 



450. Section of Fowl's egg ..... 



