SUBJECT INDEX 



Bombyx mori, composition of eggs of, 

 292 sq. ; parthenogenesis in, 230 



Bone during senescence, 718 



Bonellia, sex-differentiation in, 692 



Bordure verte of placenta, 447 



Bos indicus, hybridisation of, with Bos 

 taurus, 641 



Bos taurus, hybridisation of, with Bos 

 indicus, 641 



" Bottcher's crystals," 299, 300 



" Bouchon vaginal," 245 



Boules, 404 



Bradypus, placenta of, 409, 442 



Brain, weight of at different ages, 719 ; 

 cells of in senescence, 719 sq. 



Breeding, periodicity in, 10, 13, 28 sqq. ; 

 phenomena associated with, 24 sqq. ; 

 in snipe, 25 ; in lark, t'6. ; in albatross, i 

 t'6. ; in cock-of-the-rock, t6. ; in Cervus, ; 

 t'6. ; in Antilocapra, ib. ; in salmon, 26 ; I 

 in Polypterus, ib. ; in Lepidosiren, 6. ; 

 in dragonet, t'6. ; in Cyclopterus lumpus, | 

 27 ; in lyre-bird, t'6. ; in phalarope, 

 t'6. ; in pelican, t'6. ; in bustard, t'6. ; 

 in linnet, t'6. ; in salmon, t'6. ; in Oncho- 

 rhynchus, ib. ; in tanager, 16. ; in 

 bobolink, t'6. ; in swiftlets, 28 ; in 

 stickle-back, t'6. ; in snake, t'6. ; in 

 crocodiles, t'6. ; in tortoise, 16. 



Breeding season, Chapter I., passim ; in 

 cat, 4 ; in wolf, t6. ; in fox, ib. ; in 

 birds, 16. ; in fishes, ib. ; in insects, 

 t6. ; in Protozoa, 5 sq. ; . in Coelenterata, 

 6 sqq. ; in Hydra orientalis, G sq. ; in 

 Hydra viridis, 1 ; in Sagartia troglodytes, 

 8 ; in Actinia mesembryanthemum, ib. ; 

 in Xenia hicksoni, ib. ; in Alcyonium 

 digitatum, ib. ; in flarcophytun/. il>. ; 

 in Holophytum, ib. ; in admptytiun, 

 t'6. ; in Ctenophora, 9 ; in Nemertea, 

 t6. ; in Slychostemma asensoriatu/n. Hi. ; 

 in Diplozoon paradoxum, ib. ; in Anne- 

 lida, t'6. ; in Palolo worms, ib. sq. ; in 

 Eunice fucata, 10 ; in Eunice viridis, 

 ib. ; in Astacus fluviatilis, t6. ; in 

 Periphatus, ib. ; in Aphis, ib. ; in 

 Ceratocephale osawai, ib. ; in Poly- 

 chsetes, t'6. ; in N'ereix Ihiihuttt, ib. n. ; 

 in Odontosyllis eopla, ib. ; in Arthro. 

 poda, 10 sqq. ; in f'ryptorhyncfnit </''"''< X 

 12 ; in Patella, ib. ; in Pur p inn 

 lapillus, ib. ; in linreinum undfitn/n. 

 ib. ; in Mollusca, 12 sqq. : in Littorinn, 

 12, 14; in pond-snails, 13; in land- 

 snails, t'6. ; in Tergipes, 14 ; in sea- 

 urchin, t'6. ; in Echinodermata, t6. ; ; 

 in starfish, t'6. ; in Kchinu-s microtuber- 

 culatus, ib. ; in Echinus acutus, ib. ; 

 in Echinus e#culentnx, ib. ; in l>iil> nm 

 terosum, ib. sq. ; in ( '-ephalochordata, 

 15 ; in Amphioxus Innrroltittut, ib. ; 

 in Elasmobranchs, ib. ; in Teleosts, il>. ; 

 in cod, t'6. ; in fishes, t'6. sqq. ; in 

 plaice, 16 ; in Leplilo.tlru.t. ib. ; in 

 Amia, ib. : in l>i/inni. il>. 



bichir, ib. ; in Polypterus senegalis, ib. ; 

 in Polypterus lapradii, ib. ; in Cerato- 

 dus, ib. ; in Lepidosiren, ib. ; in Pro- 

 topterus, ib. ; in eel, 17 ; in salmon, 

 t'6. ; in tree-frog, 18 ; in toad, t'6. ; in 

 frog, ib. sqq. ; in Amphibia, 18 sqq. ; in 

 Xenopus liei-is, 19 ; in Xenopus, ib. sq.; 

 in Discoglossus, 20 ; in Axolotls, t'6. ; in 

 Triton rvaltlii, ib. ; in Rhacophorus leuro- 

 mystax, ib. ; in Rana limnocharis, ib. ; 

 in newt, 21 ; in salamander, t6. ; in 

 Reptilia, t6. ; in Aves, 16. sqq. ; in fowl, 

 t6. ; in sparrow, 22 ; in sanderling, 

 t'6. ; in Cereopsis, 22 n. ; in swifts, 23 ; 

 in Mammalia, 24 ; in camel, t'6. ; in 

 sheep, t'6. ; development of secondary 

 sexual characters during, 25 ; origin of, 

 30 ; factors influencing frequency of, 31 ; 

 in opossum, 36 ; in Didelphys aurita, 

 ib. ; in Trichosurus vulpecula, ib. ; 

 in Macropus ruficollis, ib. ; in Mus 

 rattus, 37 ; in Lepus cuniculus, 37 ; 

 in whale, 47 sq. ; in Balcenoptera 

 musculus, 48 ; in rorquals, t6. ; in 

 dolphin, t'6. ; in Canis azarce, 50 ; in 

 fox, t'6. ; in Lycaon pictus, ib. ; in cat, 

 51 ; in wild cat, 52 ; in hedgehog, 55 ; 

 in Semnopithecus entellus, 54 ; in 

 Macacus rhesus, 57 sq. ; in Cercocebus, 

 57 ; evidence of primitive, in man, 64 

 sqq. ; in Mammalia, 365 sq. 



British colonies, birth-rate in, 659 sq. ' 



Brunst, see Heat, period of 



Buccinum undatum, breeding season in, 12 



Bufo, hybridisation in, 210 



Bulbo - cavernosus muscle, 254, 262, 

 266 sqq. 



Bulbo-urethral gland, 51 



" Biirstenbesatz," 397 sq. 



Burrhel sheep, see Ovis burrliel 



Bustard, phenomena associate<l with 

 breeding in, 27 



Butyrin in milk, 594 



Calcium, excretion of, during menstruation, 

 n:; ; in egg of fowl, 278 ; metabolism of, 

 298, 389 ; during pregnancy, 519, 547, 

 550 ; in foatus of man, 547 ; in milk, 

 594; in a^li of pup. r>'.ir> ; in milk of 

 dog, ib. : in scrum of (loir. H>. 



Callicarpa, abortion by. li'i- 



('nlliiinynni-1 ///''". phenomeiM nssociatccl 

 with hrcodinj,' in. ^ti 



Caloric value of egg, 285 



Ciilote* jubntii*. I'L'L.'-iiii'inhriini- in. 2SO 



Camel, breeding season in, 24 ; n\strous 

 cycle in, 45 ; period of gestation in. ib. 



Camphor, abortion caused by, li.'iL' 



Canary, fertility in. tCJM ; sc.\-linkcd 

 characteristics in, (177: longevity in, 

 722 



1 . fertility in. (iiMI 



