736 



SUBJECT INDEX 



Echinus, movements of spermatozoa of, 

 172 sq. ; fertilisation in, 182 ; chromo- 

 somes in, 206 ; fertility in crosses of, 

 211 ; sterility in crosses of, ib. 



Echinus acutus, breeding season in, 14 ; 

 hybridisation in, 211 sq. 



Echinus esculentus, breeding season in, 

 14; hybridisation of, 211 sq. 



Echinus microtuberculatus, 315 ; breeding 

 season in, 14 ; oxidation in ovum of, 

 192 



Echinus miliaris, oxidation in ovum of, 

 197 ; hybridisation of, 211 sqq. 



Eclampsia, 533 sqq., 544 



Ectoderm, 402, 406 



Ectopic pregnancy, 136 sq., 368 



Ectoplacental cone of mouse, 467 



Ectoplacenta of rabbit, 453 sq. 



Edentata, placenta of, 409 sq., 442 



Eel, breeding season of, 17 ; sexual 

 activity in, 21 



Egg, respiratory quotient during develop- 

 ment of, 284 ; caloric value of, 285. 

 See also Ovum 



Egg formation, see Oogenesis 



Egg-membrane, in Raja, 289 ; in- Scyl- 

 lium, ib. ; in Tropidonatus, ib. ; in 

 Calotes jubatus, ib. ; in Crocodilus 

 biforcatus, ib. ; in Mustelus ICKVIS, ib. ; 

 in frog, 290 ; in perch, ib. ; mucin in, 

 ib. 



Egg-shell, composition of, 276 sqq. 



" Eikammer," of mouse, 467, 470 ; of 

 man, 499 



Ejaculation mechanism, 262 sqq., 270 



Eland, O3strous cycle in, 45 



Elastin, 289 



Elasmobranchs, breeding season in, 15 



Elephant, periodicity of breeding in, 29 ; 

 O3strous cycle in, 47 ; period of gesta- 

 tion in, ib. ; temporal gland of, 253 ; 

 yolk-sac in, 421 ; position of mammary 

 gland in, 586 ; sterility in Indian, 628 ; 

 under captivity, 630 ; longevity in, 722 



Eliomys quercinus, cestrous cycle in, 37 



Elk, fertility in, 626 



Emberiza passerina in captivity, 629 



Embryo, mucin in, 287, 463 ; of opossum, 

 417 ; of man, 426, 500 ; of shrew, 483 ; 

 provision of nutriment for, 521 sq. 



Embryonic knot, 412 n. 



Embryonic shield of Ungulata, 420 



" Embryotrophe," 436, 444 



End-bulbs of penis, 254 



Endo-enzymes, 289 



Endometrium, 72 



Endomixis, in Paramoecium, 223 



End-organs of penis, 254 



" Energy of development," 285, 293 



Energy metabolism during pregnancy, 

 552 sqq. 



Energy requirement, during sexual rest, 

 519 ; during first pregnancy, ib. ; 

 during second pregnancy, ib. ; of foetus, 

 525 



England and Wales, birth-rate in, 659 



" Entwicklungsarbeit," 363 



Environment, effect of changed, 222 sq. 



Enzymes, 289 



Eosinophil cell, 96 sq. 



Epididymis, 160, 268 



Epididymitis as cause of sterility, 645 



Epizootic abortion, 654 sq. 



Epoophoron, 71 



Erectile tissue of penis, 256 sq. 



Erection, mechanism of, 262 sqq. ; nerve 



centre for, 264 sq. ; by nervi srigentes, 



265 ; by sacral nerves, 266 

 Erector clitoridis, 267 

 Erepsin in placenta, 465 

 Erinaceus, foetal membranes of, 425 

 Erinaceus europeus, see Hedgehog 

 Ersatz-zellen, 402 

 Erythrocytes, 458 

 Erythrotoxin, 549 



Eucharis multicarnis, dissogonie in, 228 n. 

 Eunice viridis, breeding season in, 10 

 Eunice fucata, breeding season in, 10 

 Eunuch, 321 n., 323, 328 

 Eutheria, procestrum in, 107 

 Excentric placental attachment, 442 

 Excretion, of urea, 532 sq. ; of acetone 



bodies, 544 

 Exogamy, 217 n. 

 " Extractives " in semen, 297 

 Extra-uterine growth, 703 

 Extra-uterine pregnancy, development of 



mammary gland during, 611 



Faeroes Islands, breeding season of 

 anemones in, 8 



Falco albidus in captivity, 629 



Fallopian tube, structure of, 70 sqq. 



Fallow-deer, cestrous cycle in, 44 ; effect 

 of castration on, 322 



False amnion, 412, 414 



Fat, in corpus luteum, 274 sq. ; in ovary, 

 275 ; in egg of fowl, 277 ; oxidation 

 of, 284; in tails of spermatozoa, 311 ; 

 in uterine milk, 435 ; in foetus, 458 ; 

 metabolism of, in placenta, 458 sqq., 

 471 sq., 475, 503 sq. ; metabolism of, 

 in mouse, 471 sq. ; in guinea-pig, 475; 

 metabolism of, in placenta of man, 503, 

 sq. ; metabolism of, in f oatal organs, 504 ; 

 metabolism of, during pregnancy, 541 

 sqq., 544 sq. ; absorption of, by maternal 

 organism, 541 ; of maternal organism, 

 541 sq. ; requirement of foetus, 542 sq. 

 " -origin of, in foetus, 543 sq. ; in milk, 594, 

 604 ; formation of, in milk, 601 q. ; 

 of colostrum, 619 



Fatness, sterility caused by, 632 



FeKda?, fertility in, 629 



Feminisation of guinea-pig, 697 sq. 



