INDEX. 



Boasts of prey, why do they roar 

 before they spring on their 

 victim 215 



Beavers, why have they remark- 

 ably broad and thin tails ... 375 



Peavers, why are their tails with- 

 out fur 376 



Beavers, why are their incisor 

 teeth remarkably developed ... 377 



Beavers, the pcculiai habits of ... 378 



Beavers, why are the hind feet 

 better adapted for swimming 

 than the front 379 



Beavers, why do they build their 

 dams straight and oblique ... 380 



Beaver-hats, why called " castors " 381 



Bee-eaters, why so called 793 



Behemoth, be-h&-mo1h, of scrip- 

 ture, identity with the hippo- 

 potamus 454 



BelicU'ns, /xWy'-rf/'ns, why does the 

 long tailed, seldom descend to 

 the '"round 346 



Bima:-ia, bi-n a'-na 167 



Bimana, *hy man only included in 

 the order 168 



Birds, insectivorous, uses of ... 220 



Birds, why is the second order 

 called incessores 684 



Birds, why is the third order called 

 scansores 694 



Birds, why is the fifth order called 

 gyratores 833 



Birds, why is the fifth order called 

 rasores 854 



Birds, why is the sixth order called 

 cursores 874 



Birds, why is the seventh order 

 called grallatores 888 



Birds, why is the eighth order 

 called natatores 918 



Birds, why the first order called 

 accipetres 647 



Birds of prey, why they build their 

 nests upon rocks 648 



Birds of prey, why the legs and 

 thighs of, are shorter than those 

 of others 649 



Birds of prey, why destitute of 

 song 651 



Birds of prey, why some destined 

 to eat carrion 653 



Birds of prey, instance of their 

 voracity 654 



Birds, why the eyes of those 

 which prey by night are larger 

 than those of others 672 



Birds of paradise, why so called .. 765 



Birds of paradise, A*hy supposed to 

 ba suspended in air 766 



Birds of paradise, plumage of ... 767 



Birds of paradise, how is the pro- 

 fuse plumage of, useful 768 



Birds, why do thej swallow stones, 

 shells, gravel, &c. 855 



Birds, action of their digestive 

 organs 856 



Birds, how do gallinaceous, re- 

 6ciubk> ruminating animals ... 857 



Birds, why do gallinaceous, lay 

 ard hatch upon the ground ... 859 



Birds, why are the legs of gallina- . 

 ceous, soon developed 860 



Birds, why do short-tailed throw 

 their legs behind when flying ... 892 



Birds, why have fish-eaters no crop 893 



Birds, why are their pecks long 

 and moveable 994 



Birds, peculiarities in the bills of 906 



Birds, why are aquatic, able to 

 emerge from water perfectly dry 923 



Birds, why do the old ones precede 

 the young ones in migration ... 943 



Birds, by what circumstance is 

 their migration governed ... 944 



Birds, why, when flying in flocks, 

 do they arrange themselves into 

 a triangular body 946 



Birds, why do those, which take 

 long flights, fly high 947 



Birds, why have those, which 

 winter out of England, black 

 down under their feathers ... 949 



Birds, why are those, brought to 

 England from distant regions 

 hard-billed 951 



Birds, why have some, extremely 

 hard bills ... 952 



Birds, why do they lay eggs ... 953 



Birds'-eggs, why do they contain 

 white and yolk 954 



Birds'-eggs, incubation of, de- 

 scribed 955 



Birds, why have young ones a hard 

 scaly substance on their beaks... 956 



Birds' egg, description of the shell 957 



Birds, why can recently hatched 

 chicks exist without food ... 958 



Birds' eggs, why does the number 

 vary 960 



Birds, why do they select silk, 

 cotton, wool, fur, &c., for nests 961 



Bird's nests, how built and pre- 

 pared 962 



Birds' nests, why are their ma- 

 terials varied 964 



Birds' nest*, why are some warmer 

 than others 965 



Birds, why will they hesitate if 

 observed while building nests . . . 967 



Birds, why do some, require the 

 parents' care longer than others 969 



Birds, why do the male parents 

 evince an exceptional fondness 

 for their offspring 970 



Birds, structui-e of their heads and 

 ' necks 995 



Birds, why does the breast-bone 

 form an important part of their 

 organization 996 



Birds, why is the gizzard an im- 

 portant organ 998 



Birds, why do they moult ... 1000 



Birds, why are the smaller species 

 numerous and widely diffused... 972 



Birds, why have they distinct 

 voices ... ... ... ... 974 



Bilds, why is the' j'lumagc of 



