INDEX. 
A 
Abdomen of crustacea, 102 
«¢ «© grasshopper, 32 
‘¢  s¢ insects, 32 
Aboral surface, 140 
Acephala, 165 
Actinozoa, 137 
Activities of amoeba, 116 
“6 bird, 199 
sc «6 butterfly, 47 
«  ¢¢ earthworm, 150 
sc «6 fresh-water mussel, 
158 
“+ frog, 181 
«¢ «© grasshopper, 36 
a ‘* hydra, 129 
“¢ «6 spider, 93 
«  ¢ starfish, 142 
Adaptations, 86 
Adductor muscles, 156, 159 
Air-sacs of birds, 205 
‘6 66 spiders, 97 
Alimentary canal, 37 
Alternation of generations, 133 
Ambulacral areas, 141 
ie feet, 140 
Ameeba, 116 
Amphibia, 192 
Amphioxus, 247 
Ampulle, 141, 143 
Analogous organs, 106 
Anatomy, 30 
Angleworm, 148 
Animal kingdom, 2 
Animal relationships, 243 
Annulata, 148 
Anodon, 155, 157, 254 
Anosia plexippus, 68 
Antenne, 33 
‘of crayfish, 105 
ag ‘* grasshoppers, 33 
Antennules, 105 
Aorta of fish, 170 
sok frog, 195 
Apes, 232 
Aphis, 72 
Apparatus, 4 
Appendicular skeleton of frog, 189 
Aquaria, 8 
Arachnida, 113 
Archzopteryx, 209 
Argonaut, 166 
Aristotle’s lantern, 146 
Arthropoda, 2, I1I 
Ascidians, 246 
Asellus, 86 
Assimilation, 118 
Asterias vulgaris, 140 
Atlas bone, 188 
Auditory nerves, 173 
Auricle of fish, 170 
Aves, 254 
Axial skeleton, 220 
“ce cc 
B 
Balancer of fly, 58, 67 
Barnacles, 110 
Barriers, 238 
Basipodite, 104, 107 
Bat, 222 
Batrachia, 192 
Bees, 89, 90 
Bilateral symmetry, 32 
Biology, 25 
Birds and insects, 200 
“reptiles, 205 
Blood-corpuscles, 184. 
Blue-bottle fly, 57 
Bluejay, 23 
Bones of fish, 173 
“ « frog, 188 
of frog, 188 
257 
