INDEX. 



xxiii 



Swift, why does it seldom alight 



on the ground 721 



Swifts, how do they gather material 



for nests 722 



Swifts, why appointed to a distinct 



range of elevation 712 



Sword-fish, why is its jaw furnished 



with a biade-like weapon ... 1108 

 Syndactili, si/.n-dac-tl ~li, why so 



culled 788 



Tailor- bird, why so named ... 696 



Tailor- bird, singular ... ... 697 



Tapir, why has it an indurated 



skin over the head and neck ... 466 

 Tasting, why are the organs of, 



situated so near those of smell- 



ing 154 



Tasting, why is it the least im 

 paired by age of the senses ... 155 

 Tears, why are they globular ... 99 

 Tears, why have they a globular 



form 99 



Teeth, why not covered with peros- 



teum 43 



Teeth, why is there a difference 



between the front and back ... 44 

 Teeth, why are the gums well 



adapted for 94 



Teeth, fixture of, in the sockets ... 95 

 Teeth of infants, why hidden ... 96 

 Teeth, why imperfectly organized 



in comparison with adjacent 



parts 97 



Teeth, why do new ones appear in 



advanced age 98 



Teeth, why when a ticking watch 



*s placed against, do they conduct 



sound 150 



Teleostia, tel-c-ost -e-a, why is the 



third order of, so named ... 1044 



Tendons, their relation to the 



muscles 61 



Tendons, what are they 65 



Tenuirostres. ten-u-e-ros -trees, 



why so designated ... ... 770 



Thick-headed peopie, why so called 54 

 Thrushes, why dp they build near 



human habitations 708 



Thrush, why are its front toes 



fastened by a skin 710 



Tigers, their hearing very acute ... 213 

 Tiger, why the tongue of, rough... 214 

 Titmouse, why does it suspend its 



nest over a pond 762 



Toad, instance of vitality 6-33 



Toads, why are they useful in 



greenhouses 1033 



Toads, why can they live em 

 bedded in rock or stone 1034 



Tooth, carnivorous 645 



Tortoises, why are their cheeks 



distended while breathing ... 1006 

 Toucan, tuiv-kait , why so named 816 

 Toucan, why does it toss back its 



head while eating ... 817 



Toucan, why has it an immense 



bill 819 



Touch, why considered the most 



important of the senses 156 



Touch, extreme sensibility of, in 

 blindness 167 



Touch, why more vivid -when the 

 circulation is active 158 



Touch, why is the sense of, occa 

 sionally illusive 159 



Trout, why arc there many varieties 10(i8 



Trunk-fish, why covered with long 

 plates .. . 1120 



Turtles, why are they covered 

 with hard external shells ... 1004 



Turtles, why have they no teeth... 1007 



Veins, why have they a blue ap 

 pearance 75 



Veins, why do they sometimes 

 swell 7 



Veins, why are they bound up 

 when the operation of bleeding 

 is performed 77 



Ventricles, their action in the 

 circulation of the blood 74 



Venues, ver -meez, what are they 164 



Vertebrata, ver-te-bxi -ta 165 



Vulture, why a cowardly bird ... 655 



Vulture, description of the bearded 656 



Vulture, why are the head and neck 

 without feathers 657 



Vulture, why does it soar to a great 

 height 653 



Vulture, why called the king ... 660 



Wading-birds, why have they 

 long legs and short tails 889 



Wading-birds, why have they 

 wide-spreading feet 891 



Wagtails, why do they congregate 

 about cows 707 



Walrus, why has it large tusks ... 335 



Water-shrew, why bright and 

 silvery when swimming 21)2 



Weasel, whence tie proverb, 

 &quot; Catch a weasel,&quot; &c 244 



Weasel, why an excellent hunter 

 of mice 245 



Weasel, whence the proverb, &quot; He 

 builds closely with dry stones 

 who can build out the weasel &quot; 249 



Whales, by what means are they 

 enabled to eject water in a spout 581 



Whales, what provision have they 

 for the retention of heat 582 



Whales, why is the enormous size 

 of the head no impediment to 

 locomotion ... ... ... ... 583 



Whales, structure and habits of 

 the spermaceti 58 



Whales, why have they the flat 

 surface of their tails placed hori- 

 /ontally 59r 



Whalebone 585 



White-bait, what arc they 1059 



Wolf and dog, what are the points 

 of similarity 25: 



Wolf and dog, why a difference in 

 the pupils of the eyes ... ... 255 



Wood-pigeon, why are its notes 

 associated with gentleness and 

 love 845 



Woodcocks, why do they disap 

 pear from ciUtivated districta ... 897 



