INDEX. 



Bwilt, 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 eicv.ation ... ... 712 



Sword-fish, why isits jaw furnished 

 with a biadc-like weapon ... 1108 



Syndactili, sun-dac-ti'-li, why so 

 called 788 



Tailor-bird, why so named ... 686 



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



Tapir, why has it an indurated 

 skin over the head and neck ... 468 



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-e-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 peop;e, 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 633 



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, tuic-kan' , why so named 816 



Toucan, why does it toss back its 

 head while eating 817 



To'ii-.-m, why has it an immense 

 bill 819 



Touch, why considered the most 

 important of the senses 156 



Touch, extreme sensibility of, iu 

 blindness 1*7 



Touch, why more vivid when the 

 circulation is active 158 



Touch, why is the sense of, occa- 

 sionally illusive 159 



Trout, why are 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 76 



Veins, why are they bound up 

 when the operation of bleeding 

 is performed 77 



Ventricles, their action in the 

 circulation of the blood 74 



Vermes, ver'-meez, what are they 164 



Vertebrata, ver-fe-bia'-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 202 



Weasel, whence tie proverb, 

 " Catch a weasel," &c 244 



Weasel, why an excellent hunter 

 of mice 245 



Weasel, whence the proverb, " He 

 builds closely with dry stones 

 who can build out the weasel " 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 spenriaceti 58' 



Whales, why have they the flat 

 sin-face of their tails placed hori- 

 zontally 59? 



Whalebone 58c 



White-bait, what are they 105? 



Wolf and dog, what are the points 

 of similarity 25S 



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 cultivated districts ... 897 



