INDEX 



309, 355 ; 349 ; influence of ovary 

 in, 318, 328 sq., 332 sq., 341 ; 

 ovum of, 371 ; f ratal nutrition 

 in, 387, 411, 413, 416, 427 ; 

 pregnancy in, 490, 498, 500 sqq., 

 507 sq., 511 sq., 520 ; parturition 

 in, 538 ; 552 ; lactation in, 563, 

 583 ; fertility of, 590 sq., 601 ; 

 sex in, 644 sq. ; 671 



Dolphin, breeding period of, 53 



Donaldson, 662 



Doncaster, 131, 204, 210 sq., 629, 

 639 sq. 



Donkey, ovulation in, 136 ; 183 



Doran, 330 sq., 346 



Drennan, 516 



Drieseh, 190, 660 



Driessen, 442, 478 



Droop-Richmond, 564 



Drosophila ampelophila t 208 



Dubner, 520 



Dubois, 281, 300 



Dubreuil and Regaud, 159, 344 



Dubuisson, 157 



Duck, 315 ; fertility of. 591 sq. 



Duckworth, 306 



Ductless glands, 336 ; correlation 

 between generative organs and, 

 349 sq. ; during pregnancy, 

 522 sq. 



Dudley, 331, 674 



Duesberg, 131 



Dugong, 376 



Diihrssen, 185 



Dumas, 184 



Duncan, Matthews, 66, 587, 589 sq., 

 608 



Dungern, 179, 216 



Durham, 640 



Dusing, 630, 642 



Duval, 62, 361, 387, 400, 413 sq., 

 416, 420, 423 sq., 426, 437, 439, 

 462, 483, 552 



Dzierzon, 628 sq. 



E 



Earthworm, 186, 190 



Ebner, von, 561 



Echidna, cestrous cycle in, 38 sq. ; 

 lactation in, 554 



Echinodermata, breeding season of, 

 15 sq. : spermatozoa of, 174, 178, 

 sqq., 190 ; cross-fertilisation of, 

 203 sqq., 210 sq. ; partheno- 

 genesis in, 216-226 passim 



Echinoidea, 178 



Echinus, 179, 300 



Echinus acutus, 16 



Echinus esculentus, 15, 300 



Echinus microtuberculatus, 16 



Eckhard, 251, 254 sqq., 577 



Eden, 430, 478, 543 



Eel, 18, 23 



Eggelung, 554 



Ehrlich, 520 



Ehrstrom, 291, 507 



Elmer, 62 



Ejaculation, mechanism of, 251 sqq. 



Eland, cestrous cycle in, 49 ; 306 



I lasmobranchs, 16, 190, 277 



Elephant, cestrous cycle in, 52 ; 242 , 



304 ; foetal nutrition in, 419 sq. ; 



lactation in, 553 ; fertility of, 



592 ; age attained by, 681 

 Eliomys quercinus, 40 

 Ellenberger, 45-6, 47, 50 

 Ellis, Havelock, 63, 65, 70, 71, 



655 



Ember iza passer ina, 593 

 Embryotrophe, denned, 403 n. 

 Empidse, 13 



Emrys-Roberts, 47, 163, 435 

 Engelmann, 80, 83. See also Kun- 



drat and Engelmann 

 Engstrom, 521 

 Enriques, 192, 214 

 Equus prjewalskii, 51 

 Ercolani, 359, 367, 401, 459 

 Erection, mechanism of, 251 sqq. 

 Erlandsen, 267 

 Esehrieht, 358, 375 

 Essen-Mpller, 342 

 Eunice fucata, 11 

 Eunice viridis, 11 

 Eutheria, 149 

 Ewart, 51, 108, 136, 159, 201 sq., 



210, 396, 545, 615 sq., 620 

 Exner, 234 



Falco albidus, 593 



Farkas, 281, 302. See also Tangl 



and Farkas 

 Farmer, 191, 201 

 Farre, 359 

 Fehling, 512, 520 

 Fellner, 530 

 Ferret, 57 ; breeding period of, 58 



sq. ; cestrous cycle of, 99 sqq. ; 



ovulation in, 136, 141, 154 ; 



ovum in, 371 ; 416 ; fertility of, 



591, 594 



Ferroni, 481, 511 

 Fertilisation, chap, vi., 371 ; and 



sex-determination, 628 sqq. 

 Fertility, chap, xiv., 586 

 Fichera, 349 

 Fick, 200, 260 

 Finch, breeding of, in captivity, 592 



