INDEX 



Ambulacral system : starfish, 146 ; sea 

 urchin, 153 ; sea cucumber, 157. 



Amoeba : general form, 194 ; repro- 

 duction, 195 ; conjugation, 196. 



Amphipod, 48, 50. 



Annelida : Nereis, 61 ; earthworm, 67. 



Anodonta, 89. 



Anthozoa, 178. 



Arachnida, 24. 



Arbacia, 149. 



Armadillidium, 46. 



Arthropoda, 1. 



Ascidiacea, 135. 



Asterias forbsii, 141. 



Asterias vulgaris, 141. 



Asteroidea, 141. 



Beetle : external parts, 5 ; mouth- 

 parts, 13. 



Bell animalcule, 188. 



Bougainvillea, 163. 



Brachyuran decapod, 42. 



Bryozoa, 85. 



Bugula : the zocecium, 85 ; polypide, 

 85 ; internal organs, 86 ; avicularia, 

 87 ; ooecia, 87. 



Calcarea, 181. 



Campanularia, 169. 



Campanularian hydromedusan : alter- 

 nation of generations, 169 ; hydroid 

 stage, 169 ; medusoid stage, 172. 



Caprella, 50. 



Carchesium, 188. 



Caterpillar : external parts, 20 ; inter- 

 nal parts, 20. 



Centiped, 22. 



Cephalopoda, 124. 



Cestoda, 80. 



Chaetopoda: Nereis, 61; earthworm, 

 67. 



Chilopod, 22. 



Ciliate inf usorian : Paramecium, 184 ; 

 Vorticella, 188. 



Circulatory system : grasshopper, 18 ; 

 crayfish or lobster, 38 ; Nereis, 64 ; 

 earthworm, 70 ; Bugula, 87; mussel, 

 94; clam, 108; snail, 116; squid, 

 129; Molgula, 137; starfish, 148; 

 sea urchin, 154. 



Cladoceran phyllopod, 56. 



Clam, see Hard-shell clam. 



Cnidaria : Hydra, 159 ; tubularian 

 hydromedusan, 163 ; campanularian 

 hydromedusan, 169. 



Coleopterous insect, 5. 



Copepod : external anatomy, 53 ; in- 

 ternal anatomy, 54. 



Crab : external parts, 42 ; gills, 43 ; 

 internal parts, 44 ; zoea of, 51 ; 

 megalopa of, 51. 



Crayfish or lobster : external parts, 28 ; 

 appendages, 32 ; gills, 35 ; internal 

 organs, 36 ; circulatory system, 38 ; 

 reproductive system, 39 ; digestive 

 system, 39 ; excretory system, 40 ; 

 nervous system, 41 ; mysis stage of 

 lobster, 51. 



Crustacea : crayfish or lobster, 28 ; 

 crab, 42 ; sow-bug, 46 ; typical am- 

 phipod, 48 ; Caprella, 50 ; larval 

 decapods, 51 ; copepod, 53 ; Daph- 

 nia, 56 ; nauplius larva, 59. 



Cyclops, 53. 



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