INDEX 



Abdomen, Bee, 127; Crayfish, 100; 

 Grasshopper, 117; Insects, 113 



Abdominal appendages, Crayfish, 

 male, 102 ; Crayfish, female, 102 



Abdominal cavity, 182 



Abdominal vein, 195 



Accretion, 14 



Acetabulum, 180 



Acromegaly, 207 



Actinophrys, 21 



Actinopoda, 27 



Actions, reflex, 97, 221 



Adaptation, 15, 57, 67 ; Amoeba, 26 ; 

 Euglena, 32 ; Paramecium, 46 



Adaptive mimicry, 115 



Adaptive radiation, 160 



Adipose tissue, 173 



Adrenals, 207 



Adrenin, 207 



Air sacs, 119, 129 



Albumen, Hen's egg, 233 



Algae, 11, 23, 34 



Alimentary canal, Bee, 128; Clam, 

 142; Crayfish, 104; Earthworm, 

 85; Frog, 184; Grasshopper, 118; 

 Man, 187 



Alternation of generations, Obelia, 

 68, 72 



Alveoli, teeth, 178 



Amaroucium, 141 



Amblysloma, 151 



Ambulacral grooves, 75 



Ammocoetes, 154 



Amnion, 235 



Amniotic cavity, 235 



Amoeba, description, 19-28 ; lab- 

 oratory, 257 ; life processes, 22-26 ; 

 structure, 19-22 



Amoebocytes, 78 



Amoeboid movement, 16, 20 



Amphibia, 157 



Amphioxus, 152 



Ampulla, 77 



Amylopsin, 188 



Anabolism, 8, 13 (see Life processes) 



Anal opening, Clam, 143; Earth- 

 worm, 87 ; Frog embryo, 225, 227 



Anal spot, Paramecium, 42, 43 ; Vor- 

 ticella, 50 



Angulo-splenial bones, 176 



Animal pole, Frog's egg, 222 



Animals, hermaphroditic, Earth- 

 worm, 92 ; Hydra, 64 



Annelida, 81, 83 ; vs. Arthropoda, 99 



Anodonta, 139 



Antenna cleaner, 126 



Antenna comb, 126 



Antennae, Bee, 124, 134; Crayfish, 

 103, 108 



Antennules, Crayfish, 103, 111 



Anterior chamber, eye, 220 



Anthropoidea, 163 



Antibody, 200 



Ants, polymorphism, 137 



Anura (see Salientia) 



Aorta, Clam, 143 ; Frog, 195 



Aortic loops, 88-90 



Appendages, Bee, 123-128 ; Cray- 

 fish, 100-104; homologous, 99; 

 pentadactyl, 157, 160, 179, 181 

 (see Legs, Limbs) 



Appendicular skeleton, 179 



Appendix, man, 187 



Aqueous humor, 220 



Arcella, 27 



Arch, neural, 178 



Arm, Frog, 180 



Arteries, Clam, 143 ; Crayfish, 105, 

 106 ; Frog, 192, 195 (see Vascular 

 system) 



Artery, umbilical, 238 



Arthrobranchiae, 107 



Arthropoda, 99, 113, 114 



Articulating processes, 179 



Assimilation, 22 



Astacus, gills, 107 



Ateleura, 137 



Auditory capsule, 217 



Auditory organs, Crayfish, 111; 

 Frog, 217 



Auditory ossicles, 217 



Auricle, Bee leg, 127 



367 



