INDEX. 



Abdomen, 19, 141 



development of, 213 

 Abdominal appendages, 113 



development of, 217 , 

 Abdominal somite, characters of , 1 42 

 Etiology, 47 

 Agassiz, 308 

 Alimentary canal, 51 



development of, 213, 222 

 Ambulatory legs, 168 

 American Crayfishes, 243, 247 

 Amoeba, 285 



Amurlaud Crayfishes, 304 

 Antenna, 23, 172 



development of, 214, 218 

 Antennule, 23, 173 



developmmtof, 214, 218 

 AnthrapaUemon, 341 

 Anus, 29 



Apodeme, 99, 158, 175 

 Appendage, 24, 143, 161, 173 



abdominal, 143 



cephalic, 170 



thoracic, 164 

 Archenteron, 211 

 Arctogaeal province, 314 

 A reola, 235 



Aristotle, referred to, 4 

 Arteries, 71 



Arteries, development of, 224 



Arthrobranchia, 75 



Arthrophragm, 158 



Arthropoda, 279, 284 



Articulations, 95 



Asiatic Crayfishes, 304 



Astacina, 254 



Astacoides, 250, 313 



AstacomoTpJia, 338 



Astacopsis, 250, 264 



Asia ens, division into sub-genera, 



290 

 Astacvs angido.nia, 302, 310 

 colcMcus, 302, 310 

 daurictis, 304, 310 

 Jiuvia tills, 



anatomy, general account 



of, 17—31 

 attachment of young to 



mother, 40, 351 

 branchial formula, 266 

 development, 205-226 

 distribution, geographical 



44, 288, 298 

 distribution, chronologi- 

 cal, 44 

 ecdysis, 32, 350 

 general characters, 6 

 growth, 31, 349 

 labits, 8 



