742 



SUBJECT INDEX 



Lactation, 33 ; Chapter XIII., passim ; 

 period of, in walrus, 55 ; effect of, on 

 cestrous cycle, 69 ; corpus luteum dur- 

 ing, 149 ; and menstruation, 369, 598, 

 608 ; effect of pituitary gland on, 383 ; 

 influence of stage of, on milk, 596 sqq. ; 

 and ovariotomy, 598, 611, 622; ad- 

 vance of, 598 sq. ; duration of, 599 sq. ; 

 duration of, in cow, ib. ; duration of, in 

 man, 600 ; after paraplegia in man, 609; 

 foetal hormone, theory of, 611 ; in 

 relation to placenta, 612 sq. ; and 

 castration, 614 ; before parturition in 

 rabbit, 615 ; commencement of, in 

 Dasyurus, ib. ; commencement of, in 

 man, ib. ; before parturition in goat, 

 ib. ; causation of, in Monotremata, 

 ib. sq. ; as controlled by corpus luteum, 

 ib. ; explanation of, in virgin dog, 617 ; 

 corpus luteum as essential to, 621 sq. ; 

 effect of prolonged, on fertility, 637 



Lactic acid in milk, 594 



Lactiferous ducts, 588 



Lactose, in maternal organism, 537 ; in 

 urine of puerperium, 540 ; in milk, 

 594 ; formation of, in guinea-pig, 603 ; 

 formation of, in goat, 602 sq. ; in 

 colostrum, 619 



Lactosuria, 602 ; during pregnancy, 539 sq. 



Lsevulinic acid, 307 



Lsevulose, in maternal organism, 537 ; 

 in foetal rabbit, ib. ; in foetal cow, ib. ; 

 in foetal sheep, if>. 



Lamprey, polyspermy in, 183 ; partheno- 

 genesis in, 234 ; sex-determination in, 

 664 



Lancelet, see Amphioxus lanceolatus 



Land-snail, breeding season in, 13 



Lark, mating habits ,of, 25 



Larynx, effect of castration on, 321 



Lead, effect of, on germ- cells, 209 



Lecithin, 310 ; in corpus luteum, 274 sq. ; 

 in hen's egg, 277, 279 sq., 282 ; in yolk 

 of egg, 283 ; in spermatozoa, 303 ; in 

 blood of pregnancy, 542 ; in milk, 594 



Lemur, cestrous cycle in, 56 ; uterine 

 cycle in, 91 



Lemuridae, placenta of, 408, 440 



Lepidoptera, sex-determination in, 664, 

 678 



Lepidosiren, breeding season in, 16 ; 

 breeding phenomena in, 26 



Lepidosteus, breeding season in, 16 



Lepilemur, placenta of, 441 



Leptotenic stage of oogenesis, 116, 155 



Lepus, formation of corpus luteum in, 145 



Lepus cuniculus, see Rabbit 



Lepus variabilis, oestrous cycle in, 38 



Leucine, 288, 304 



Leucocytes, 96 sq., 104 sq. 



Leucocytosis, 556 ; during parturition, 572 



Life, duration of, 721 sqq. ; phases in, 

 Chapter XVI. 



Life cycle, theory of, 225 ; in Arbacia, 

 227 ; in Tautogolabrus, ib. ; in Fundulus, 



ib. ; in Asterias, ib. ; in frog, ib. sq. ; 

 in salamander, ib. ; in JUoniezia, 228 



Limnea, breeding season in, 13 



Linnet, phenomena associated with breed- 

 ing in, 27 ; in captivity, 629 



Linseed, sterility caused by excess of, 631 



Lion, oestrous cycle in, 52 ; period of 

 gestation in, 53 ; fertility of hybrid with 

 jaguar, 641 



Lipase in placenta, 465 



Lipochromes, 242 ; of corpus luteum, 273 ; 

 of Maja squinado, 294 sq. 



Lipoids, 310 ; in corpus luteum, 274 ; 

 in ovary, 274 ; in semen, 297 ; meta- 

 bolism of, in placenta, 297, 504 



Lipolytic ferments, 507 



Liquor amnii, function and composition 

 of, 414 



Liquor folliculi, 121 sq. 



Litter, factors governing size of, 623 sqq. ; 

 size of, in Ungulates, 623 ; size of, in 

 sheep, ib. ; size of, in goat, ib. ; size 

 of, in pig, ib. ; size of, in Rodentia, ib. sq.; 

 size of, in rat, 624 ; size of, in Cheirop- 

 tera, ib. ; size of, in bat, ib. sq. ; size 

 of, in relation to period of gestation, 

 ib. ; size of, in relation to number of 

 teats, ib. ; size of, in man, ib. ; size of, 

 in rabbit, 625 ; size of, in hare, ib. 



Littorina, breeding season in, 12, 14 



Liver, hypertrophy of, during pregnancy, 

 556 ; during senescence, 718 



Livetin in egg of fowl, 283. 286 



Lobelia, self-sterility of, 215 



Lochia, 580 ; rubra, ib. ; serosa, ib. ; 

 alba, ib. ; amount of, ib. sq. 



Loligo, development of, 191 



London, sex -ratio in, 687 



Longevity, in Actinia mesembryanthemum, 

 721 ; in Sagartia troglodytes, ib. ; in 

 Mollusca, ib. ; in Insecta, ib. ; in 

 Hemiptera, ib. ; in bees, ib. ; in fish, 

 ib. ; in pike, ib. ; in carp, ib. ; in 

 Reptilia, ib. ; in crocodiles, ib. ; in 

 tortoise, ib. ; in birds, ib. ; in canary, 

 ib. ; in gull, ib. ; in eagle, ib. ; in 

 heron, ib. ; in owl, ib. ; in raven, ib. ; 

 in swan, ib. ; in goose, ib. ; in parrot, 

 ib. ; in Mammalia, ib. ; in elephant, 

 ib. ; in horse, ib. ; in dog, ib. ; in cat, 

 ib. ; in rat, ib. ; in mouse, 723 ; in 

 man, ib. ; in sheep, ib. ; factors control- 

 ling, 725 sq. 



Lota vulgaris, chemistry of spermatozoa 

 of, 305 



Lottia, parthenogenesis in, 234 ; fertilisa- 

 tion in, 236 



Lumbar nerves, 270 ; action of, on genera- 

 tive organs, 267 ; of rabbit, 560 ; of 

 cat, ib. 



Luteins, 292 ; in corpus luteum, 273 ; 

 in hen's egg, 281 ; absorption spectrum 

 of, 274 ; in yolk of egg, 283 ; in Crus- 

 tacea, 295 sq. 



Lutein cysts, 368 



