746 



SUBJECT INDEX 



in, 643 ; foetal atrophy in, 656 sq. ; 



sex-determination in, 669 ; growth of, 



712 ; puberty in, 714 ; menopause in, 



717 ; longevity in, 723 

 Mucin, in embryo, 287, 463 ; in "egg- 

 membrane, 290 

 Mucinogen, 290 

 Mule, sterility of, 211 

 Murinus, amnion of, 490 n. 

 Mus, formation of corpus luteum in, 145 

 AIv-s decumanus, see Rat 

 Mus minutus, cestrous cycle in, 37 

 Mus musculus, see Mouse 

 Mus rattus, breeding season in, 37 ; 



period of gestation in, ib. 

 Mus sylvaticus, cestrous cycle in, 37 

 Musca corvina, pcecilogonie in, 228 

 Muscle during senescence, 718 

 Musk deer, perineal gland in, 253 ; 



inguinal gland in, ib. ; preputial gland 



in, ib. ; 



Musk-ox, cestrous cycle in, 45 

 Musk rat, perineal gland in, 253 ; inguinal 



gland in, ib. ; preputial gland in, ib. 

 Mussel, see Mytilus 

 Mustelus Icevis, 415 ; egg-membrane in, 



289 

 Myliobatis, formation of corpus luteum in, 



145 



Myometrial gland, 372, 577, 618 

 Myriapoda, sex-determination in, 678 

 Myrmecophaga, placenta of, 442 

 Mytilus, hybridisation of, 213 



N 



Nahrzellen, 417 

 Necrobiosis, 592 

 Nematode, maturation of ova in, 128 ; 



sex-determination in, 678 

 Nematus ventricosus, sex-determination 



in, 665 sq. 



Nemertea, breeding season in, 9 

 Nephritis of pregnancy, 552 

 Nereis, sperm -agglutination in, 186 ; 



fertilisation in, 194 sq. ; development 



of, 227 



Nereis dumcrilic, breeding season in, 10 n. 

 Nereis limbata, breeding season in, 10 n. 

 Nervi erigentes, 267, 272, 564 

 Neuronophags, 726 

 Newt, sexual activity in, 21 ; artificial 



impregnation in, 176 ; ferment of 



gonad in, 318 

 Nipple of man, 588 

 Nitrogen, retention of, during pregnancy, 



530 sqq., 555 ; excretion of, 532 sqq. ; 



in milk, 595 

 Nitrogen balance, during pregnancy, 



525 sq. ; during pregnancy, in dog, 



526 sqq. ; during pregnancy, in rabbit, 

 ib. 



Nitrogen-lactose ratio in milk, 605 



Nitrogen metabolism, 391 ; in bitch, 49 ; 

 during menstruation, 63 ; during preg- 

 nancy, 519 



Non-deciduata, classification of, 408 



Nucleic acid, 309, 311 ; from spermato- 

 zoa, 307 



Nucleolus, 109 



Nucleo protein, 281 sq. ; in head of sper- 

 matozoa, 312 ; in fcetus, 548 



Nucleotide, 309 



Nucleus, 109 ; ratio of, to cytoplasm, 

 702 sq. 



Nursing period, 599 ; in man, 600 



Nutrition, of fcetus in Perameles, 36 n. ; 

 placenta as an organ of, Chapter X. ; 

 influence of, on fertility, 627 sqq. ; 

 influence of, on sex-determination, 

 669 sqq., 684 sqq. 



Nycticebus, placenta of, 440 



Nylghau, cestrous cycle in, 45 



Ob-placental folds of rabbit, 452 



Ocneria dispar, effect of castration in, 

 325 



Odontosyllis euopla, breeding season in, 

 10 n. 



(Edema in pregnancy, 552 



(Estrous cycle, in Mammalia, Chapter II., 

 passim ; in Monotremata, 35 ; in 

 platypus, ib. ; in Echidna, ib. ; in 

 Marsupialia, ib. sq. ; in Pharcolarctus 

 cinereus, ib. ; in kangaroos, 36 ; in 

 Marsupial cat, ib. ; in Dasyurus 

 viverrinus, ib. ; in opossum, ib. ; in 

 Didelphys aurita, ib. ; in Rodentia, 

 37 sqq. ; in Mus decumanus, 37 ; in 

 Mus musculus, ib. ; in Mus minutus, 

 ib. ; in Mus sylvaticus, ib. ; in Arvicola 

 glareolus, ib. ; in Arvicola agrestis, ib. ; 

 in Eliomys quercinus, ib. ; in Gerbillus 

 hertipes, ib. ; in Dipodillus campestris, 

 ib. ; in Dipodillus simoni, ib. sq. ; in 

 Meriones shawi, ib. ; in Meriones longi- 

 frons, ib. ; in Lepus cuniculus, 38 ; 

 in Lepus variabilis, ib. ; in Sciurus 

 vulgaris, ib. ; in Pachyuromus duprasi, 

 ib. ; in Cavia porcellus, ib. ; in Ungulata, 

 39 sqq. ; in sheep, 39, 42 sq. ; in 

 Ovis species, 39 ; in Merino sheep, 

 41 ; in goat, 43 ; in cattle, ib. ; in 

 ibex, ib. sq. ; in markhor, ib. ; in 

 barasingha, ib. ; in Hemitragus, ib. ; 

 in bison, ib. sqq. ; in deer, 43 sq. ; 

 in fallow-deer, 44 ; in gnu, 45 ; in 

 Gazella dorcas, ib. ; in giraffe, ib. ; 

 in eland, ib. ; in nylghau, ib. ; in water- 

 buck, ib. ; in gayal, ib. ; in axis, ib. ; 

 in wapiti deer, ib. ; in red-deer, ib. ; 

 in camel, ib. ; in walrus, ib. ; in yak, 

 ib. ; in musk-ox, ib. ; in pig, 46 ; in 

 hippopotamus, ib. ; in Timor pony, ib. ; 

 in horse, ib. sq. ; in elephant, 47 ; in 



