INDEX OF SUBJECTS 



All numbers refer to pages. Words in italics are names of families, 

 genera, species, or of higher divisions. Numbers in thick type are num- 

 bers of pages on which there are figures. 



Aborting spindle, 157. 

 Accessory chromosome, 134, 202. 

 Acidophile, 11. 

 Actinospherium, 222. 

 Ageniaspis, 146. 

 Allelomorph, 309. 

 Alternation of generations, 23. 

 Alveolar structure of protoplasm, 



4. 



Amcebocyte, 71, 73, 79. 

 Amia, 32, 33. 



Amitosis, 13-14, 133-139, 250. 

 Amphiaster, 15. 

 Amphibia, amitosis, 134-135; her- 



maphroditism, 205 jf. 

 Amphimixis, 309. 

 Amphiuma, 135. 

 Amyloplastid, 7. 

 Anaphase, 15, 16. 

 Anello cromatico, 121, 123, 223. 

 Animal pole, 20. 

 Aptera, life cycle, 22. 

 Arcella, 26. 

 Archseocyte, 70-73. 

 Archoplasm, 5, 7. 

 Arenicola, 188. 



Armadillo, polyembryony in, 161. 

 Arphia, 307. 

 Arthropoda, 212. 

 Ascaris, 122, 174 /., 217 /., 230, 



241, 301; maturation in, 261, 



263 ; mitochondria in, 284. 

 Asexual larvae, 149. 

 Asplanchna, 186, 225. 



Aster, 15. 



Asterias, 6. 



Attraction-sphere, 5, 7, 227. 



Aurelia, 183. 



Aussenkornchen, 164, 213, 216, 228. 



Axolotl, 159, 208. 



Bacteria, 4, 186-187. 



Basophile, 11. 



Bat, 188. 



Besondere Korper, 180, 181 ff., 



213, 228, 239. 

 Bidder's organ, 207. 

 Binary fission, 17. 

 Binuclearity hypothesis, 27. 

 Bioblast, 276. 

 Bivalent chromosomes, 44. 

 Blastotomy, 161. 

 Bryozoa, 161. 

 Budding, 17, 22, 23, 69, 161, 297. 



Calligrapha, 109, 111, 230. 



Calliphora, 107, 111 /., 235. 



Camponotus, 221. 



Canthocamptus, 165. 



Cat, 187. 



Cell, 2-16; definition, 3; division, 



13-16; lineage, 29; shape, 4; 



size, 4 ; theory, 3. 

 Centrifuged eggs, 178. 

 Centrosome, 5, 7, 14, 15, 164, 169, 



237, 238. 

 Cerebratulus, 232. 

 Cestoda, 136-137. 



341 



