INDEX. 



785 



Avicula, .... 372 



Axial Skeleton, see Backbone, 432 



Axis vertebra, . . . 660 



Axolotl, .... 556 



Aye-Aye, .... 722 



Azygobranchs, . . . 357 



Babirusa, .... 694 



Baboons, .... 725 



Backbone, .... 432 



Bactrites, .... 385 



Baculites, .... 385 



Badger, .... 716 



Balsena, .... 709 



Batenoidea, .... 709 



Batenoptera, . . . 709 

 Balanoglossus — 



,, Description of, . . 391 



,, General characters of, 391 



,, Habits of, . . . 392 



,, Invertebrate characters of, 398 



,, Species of, . . . 392 



,, Vertebrate characters of, 397 



Balantidium, .... 105 



Balanus, .... 269 



Baleen, .... 706 



Bandicoot, .... 686 



Barbary ape, .... 7^6 



Barbule, .... 495 



Barnacle, .... 272 



Basiliscus, .... 577 



Basitemporal, . . . 596 



Basipodite of Crayfish, . . 255 



Batoidei 506 



Bats, 719 



Bdellostoma, .... 469 



Bears, 716 



Beaver, 711 



Bees, 298 



Beetles, 304 



Belemnites, .... 386 



BeUnurus, .... 340 

 Belodon, . . . .589 



Beluga, 709 



Bernhardus, .... 160 



Beroe, I57 



Bilateral symmetry, . 31, 161 



Bile 22 



Bilharzia, . . . .170 



Bimana, .... 728 



50 



Bionomics — 



Birds, . 



Ccelentera, 



Crustacea, 



Fishes, 



Insects, 



MoUusca, 



Spiders, 



Sponges, 

 Bipalium, 



Bipinnaria, . . . 234 

 Bird lice. 

 Birds, . 



,, and Reptiles, 



,, Classes of, 



,, Classification of, 



,, Courtship of, 



,, Diet of, 



,, Eggs of, 



,. Feathers of, . 



„ Flight of, . 



,, General characters of, 



,, ,, survey of, 



,, Intelligence of, 



,, Life of, 



,, Migration of, 



,, Moulting of, 



,, Nests of, 



,, Pedigree of. 



,, Song of, 

 Birgus, . 

 Bitterling, 

 Bivalves, 



,, Classification of, 

 ,, General characters of, 363 

 ,, ,, notes on, 



,, Habits of, 

 ,, Life history of, 



,, Past history of, 

 Bivium of Sea urchin, 



,, of Starfish, 

 Bladder of Frog, . 

 ,, of Mammals, 

 ,, -worms. 

 Blastocyst, 

 Blastoderm, . 

 Blastoidea, 

 Blastomere, . 

 Blastopore, . 

 Blastosphere,. 



