INDEX 
PAGE 
Bird lice, . . - 361 
Birds ; ‘ ‘ . 647 
»» and Reptiles . . 612 
», Classification of . - 686 
»» courtship of . . . 677 
» diet of . ‘ . « 679 
» eggs of . A . 678 
»» feathers of : - 655 
s» flight of - 673 
»» general characters ‘of » 648 
35 Migration of. . 680 
»» moulting of . Py » OF 
» nests of ; . 677 
>» pedigree of . - 690 
song of es 3 - 677 
Birgus : . . + 309 
Bivalves . + 425 
Bivium of starfish . ‘: - 258 
Bladder of frog - » 591 
»» Of lizard ‘ - 628 
» Of Mammals . - 717 
+> worms » 190, 195 
Blastocyst . ; - 728 
Blastoderm . a * s 67 
Blastoidea - ‘i a 275 
Blastomere . ‘ : +» 471 
Blastopore 7 3 - 67 
Blastosphere . F . - 67 
Blastula 5 - 67 
Blatta . . - 326 
Blind spot of eye. : : - 497 
Blood . . 28, 42 
» of frog 591 
», of Mammals 696, 712 
Boa. a 634 
Body cavity . 347 
Weis eos of Amphioxus 465 
» 9» Of Arenicola 226 
» 9 Of Balanoglossus 436 
» 99 Of crayfish . + 290 
» 9 Ofearthworm . 213 
» 9  OfInsects . » 347 
» 9 Of Teleostean . 504 
x» 9 Of Vertebrates . 503 
Bone . ‘ 2 » 42 
Bonellia . 5 + 233 
Bony pike . : + 571 
Book scorpions . - 366 
Bos « “ " « 759 
Bothriocephalus . fi » 196 
Botryllus, . 
Bougainvillea . 
Bovidee . , 
Brachiodont . 
Brachiolaria . 5 
Brachionus . 2 
Brachiopoda . 
Brachyura 
Brackish water fauna 
Bradypodidze 
Bradypus 
Brain of pigeon 
x» of skate 
», Of Vertebrates 
»» summary of parts of 
Branchellion . 
Branchiz = Gills 
Branchial arches, . 
55 sense organs . 
Branchiobdella 
Branchiopoda 
Branchiostegal rays 
Branchipus . 
Branchiura 
Breast bone . 
Brisinga 
Brittle-stars . 
Bryozoa 
Buccinum 
Buckie = Buccinum 
Budding 
Bugs ‘ é 
Bulbus arteriosus . 
Bulla . 
Bunodont . 
Bursa Fabricii . 
Butterflies a 
Byssus . . . 
CapniIs flies . . 
Ceca . i 
Cecilia. . 
Ceecum of rabbit . 
Ca’ing whale é 
Calamoichthys . 
Calcaneum . 
Calcarea ° : 
Callorhynchus , 
Calymene . 
Calyptoblastic , 
