INDEX 



An asterisk (*) after a page number indicates that a figure of the object named 

 will be found on that page or on the plate facing that page. Family, generic ; 

 and specific names of animals and plants are printed in Italics. 



Abdomen: Crayfish, 194*; Honeybee, 

 238-239, 244*. 



Aboral surface, 59, 65. 



Absorption, 13, 46: Ameba, 49; Earth- 

 worm, 171 ; Paramecium, 67. 



Accretion, growth by, 13. 



Achromatic substance, 32. 



Acoelomata, 5, 7, in. 



Accelomate, 139. 



Adaptation, 282. 



Adaptive power of animals, 16. 



Adjustor, 179. 



Afferent gill channels, 203. 



Afferent nerve fibers, 178. 



Air sacs, 243*. 



Alchemist, 23. 



Alimentary canal, 82, 89, 101, in: 

 Ascaris, 160, 161*; Crayfish, 195*, 

 200-201; Earthworm, 168*, 169-170; 

 Honeybee, 240, 241*, 242, 252; Pla- 

 naria, 154*, 155. 



Allolobophorafcetida, 182, 187, 188. 



Allolobophora (Helodrilus) longa, 164. 



Altman, 20. 



Alveolar theory of protoplasmic struc- 

 ture, 20*. 



Ameba, 37*-s8, 59, 61, 64, 73, 81, 82, 101, 

 127, 228; anatomy, 38-41; behavior, 

 53-56; growth, 50; habitat, 38; imi- 

 tations, 45-49; locomotion, 41-46, 

 42*, 44*, 45*; metabolism, 46-50; 

 reproduction, 50, 51*, 52*, 53. 



Ameba binucleata, 52*. 



Ameba verrucosa, 42, 43. 



Amebidce, 81. 



Amebulae, 52. 



Amitosis, 29, 32-33*. 



Amphiaster, 30*, 31. 



Amphiblastula, 149, 150* 



Anabolism, 13 



Anal spot, 60*, 67. 

 Anaphase, 30*, 31. 

 Anatomy, 2, 270-271: Ameba, 37*, 38- 



41; Ascaris, 160-163, 161*; Crayfish, 



195*, 200-211 ; Earthworm, i68*-i82; 



Euglena, 82-85, 83*; Grantia, 145- 



148, 146*; Honeybee, 234-250, 241*; 



Hydra, 119-125; Paramecium, 59-64; 



Planaria, 154*-! 56. 

 Ancestral inheritance, 289. 

 Ancon sheep, 281-282. 

 Andrena, 265*. 

 Andrews, E. A., 216. 

 Animal mind, 57, 305-306. 

 Animalcules, wheel, 5. 

 Animals compared with plants, 17-18. 

 Annelida, 6, 7, 125, 190-192, 225, 227. 

 Anopheles, 88, 91. 

 Antenna: Crayfish, 195*, 197, 216; 



Honeybee, 235*, 254. 

 Antenna cleaner, 236*, 237. 

 Antenna comb, 236*, 237. 

 Antennary artery, 195*, 202. 

 Antennules, 195*, 197, 216. 

 Anterior, 59. 

 Anthozoa, 139. 

 Antimere, 4, 5. 

 Ants, 261, 264, 300. 

 Anus, 4, 5, 6: Ascaris, 160; Crayfish, 



195*, 201, 216; Earthworm, 167; 



Honeybee, 239, 240, 241*. 

 Apida, 260, 261, 264. 

 Apis, 260, 261. 

 Apis mettifica, 233-259, 234*. 

 Apopyles, 145, 151*. 

 Appendage: Crayfish, 195-200, 196* 



209*; Honeybee, 235-239, 236*. 

 Arachnida, 225, 227, 228. 

 Archenteron, 109*, no 

 Areola. 105 



337 



