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 

 taunts, 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, ib. ; in albatross, 

 ib. ; in cock-of -the-rock, ib. ; in Cervus, 

 ib. ; in Antilocapra, ib. ; in salmon, 26 ; 

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

 in dragonet, ib. ; in Cyclopterus lumpus, 

 27 ; in lyre-bird, ib. ; in phalarope, 

 ib. ; in pelican, ib. ; in bustard, ib. ; 

 in linnet, ib. ; in salmon, ib. ; in Oncho- 

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

 bobolink, ib. ; in swiftlets, 28 ; in 

 stickle-back, ib. ; in snake, ib. ; in 

 crocodiles, ib. ; in tortoise, ib. 



Breeding season, Chapter I., passim ; in 

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

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

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

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

 Hydra viridis, 1 ; in Sagartia troglodytes, 

 8 ; in Actinia mesembryanthemum, ib. ; 

 in Xenia hicksoni, ib. ; in Alcyonium 

 digitatum, ib. ; in Sarcophytum, ib. ; 

 in Holophytum, ib. ; in Sclerophytum, 

 ib. ; in Ctenophora, 9 ; in Nemertea, 

 ib. ; in Stychostemma asensorialum, ib. ; 

 in Diplozoon paradoxum, ib. ; in Anne- 

 lida, ib. ; in Palolo worms, ib. sq. ; in 

 Eunice fucata, 10 ; in Eunice viridis, 

 ib. ; in Astacus fluviatilis, ib. ; in 

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

 Ceratocephale osawai, ib. ; in Poly- 

 chaetes, ib. ; in Nereis limbata, ib. n. ; 

 in Qdontosyllis eopla, ib. ; in Arthro- 

 poda, 10 sqq. ; in Cryptorhynchus gravis, 

 12 ; in Patella, ib.; in Pur pur a 

 lapillus, ib. ; in Buccinum undatum, 

 ib. ; in Mollusca, 12 sqq. ; in Littorina, 

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

 snails, ib. ; in Tergipes, 14 ; in sea- 

 urchin, ib. ; in Echinodermata, ib. ; 

 in starfish, ib. ; in Echinus microtuber- 

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

 in Echinus esculentus, ib. ; in Diadema 

 serosum, ib. sq. ; in Cephalochordata, 

 15 ; in Amphioxus lanceolatus, ib. ; 

 in Elasmobranchs, ib. ; in Teleosts, ib. ; 

 in cod, ib. ; in fishes, ib. sqq. ; in 

 plaice, 16 ; in Lepidosteus, ib. ; in 

 Amia, ib. ; in Dipnoi, ib. ; in Polypterus 



' 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, 

 ib. ; in tree-frog, 18 ; in toad, ib. ; in 

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

 Xenopus Icevis, 19 ; in Xenopus, ib. sq.; 

 in Discoglossus, 20 ; in Axolotls, ib. ; in 

 Triton waltlii, ib. ; in Rhacophorus leuco- 

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

 in newt, 21 ; in salamander, ib. ; in 

 Reptilia, ib. ; in Aves, ib. sqq. ; in fowl, 

 ib. ; in sparrow, 22 ; in sanderling, 

 ib. ; in Cereopsis, 22 n. ; in swifts, 23 ; 

 in Mammalia, 24 ; in camel, ib. ; in 

 sheep, ib. ; 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 Balfenoptera 

 musculus, 48 ; in rorquals, ib. ; in 

 dolphin, ib. ; in Canis azarce, 50 ; in 

 fox, ib. ; 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 burrhel 



Bustard, phenomena associated with 

 breeding in, 27 



Butyrin in milk, 594 



Calcium, excretion of, during menstruation, 

 63 ; in egg of fowl, 278 ; metabolism of, 

 298, 389 ; during pregnancy, 519, 547, 

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

 594 ; in ash of pup, 595 ; in milk of 

 dog, ib. ; in serum of dog, ib. 



Callicarpa, abortion by, 652 



Callionymus lyra, phenomena associated 

 with breeding in, 26 



Caloric value of egg, 285 



Calotes jubatus, egg-membrane in, 289 



Camel, breeding season in, 24 ; cestrous 

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



Camphor, abortion caused by, 652 



Canary, fertility in, 629 ; sex-linked 

 characteristics in, 677 ; longevity in, 

 722 



Canidse, fertility in, 629 



