INDEX 



227 



117; reproductive system, 120 ; nerv- 

 ous system, 121. 



Limax maxima, 112. 



Lithobius, 22. 



Lobster, see Crayfish. 



Loligo pealii, 123. 



Macruran decapod, 28. 



Metridium, 178. 



Molgula : external parts, 135 ; digest- 

 ive system, 136 ; reproductive sys- 

 tem, 137; circulatory system, 137; 

 nervous system, 138; excretory sys- 

 tem, 138 ; peribranchial chamber, 

 138 ; respiratory system, 139. 



Mollusca : freshwater mussel, 89 ; 

 hard-shell clam, 103 ; land snail, 

 112 ; squid, 123. 



Mussel, see Freshwater mussel. 



Mya arenaria, 103. 



Myriapoda, 22. 



Naked rhizopod, 194. 



Nereis : external parts, 61 ; parapodia, 

 63 ; internal anatomy, 63 ; diges- 

 tive organs, 64 ; circulatory system, 

 64 ; excretory system, 65 ; nervous 

 system, 65 ; reproductive system, 

 66. 



Nervous system : grasshopper, 18 ; 

 crayfish or lobster, 41 ; crab, 44 ; 

 Daphnia, 57 ; Nereis, 65 ; earth- 

 worm, 74 ; planarian, 78 ; tapeworm, 

 82 ; Bugula, 87; mussel, 97; oyster, 

 102; hard-shell clam, 111; snail, 

 121; squid, 133; Molgula, 138; star- 

 fish, 147 ; sea urchin, 154 ; medusa, 

 168, 174. 



Obelia, 169. 



Oligochaetous annelid, 67. 

 Oniscus, 46. 

 Orthopterous insect, 9. 

 Oyster, 99. 



Paramecium : general form, 184 ; re 



production, 187 ; conjugation, 187. 

 Pelecypoda: freshwater mussel, 89 



oyster, 99 ; hard-shell clam, 103. 

 Pennaria, 163. 

 Phyllopod, 56. 

 Planarian worm : external parts, 76 



digestive system, 77 ; reproductive 



system, 77 ; nervous system, 78 



excretory system, 78. 

 Plathelminthes : planarian worm, 76 



tapeworm, 80. 

 Polychaetous annelid, 61. 

 Polyzoa, 85. 

 Porcellio, 46. 

 Protozoa : Paramecium, 184 ; Vorti- 



cella, 188 ; Euglena, 192 ; Amoeba, 



194. 

 Pulmonate gastropod, 112. 



Reproductive system : grasshopper, 

 16 ; caterpillar, 21 ; crayfish or lob- 

 ster, 39; copepod, 55 ; Daphnia, 57; 

 Nereis, 66 ; earthworm, 71 ; plana- 

 rian, 77 ; tapeworm, 83 ; Bugula, 

 87; mussel, 97; clam, 110; snail, 

 120 ; squid, 132 ; Molgula, 137 ; star- 

 fish, 145 ; sea urchin, 152 ; Hydra, 

 161 ; tubularian, 168 ; campanula- 

 rian, 173 ; Grantia, 183 ; Parame- 

 cium, 187; Vorticella, 190 ; Euglena, 

 193 ; Amoeba, 195. 



Respiratory system : grasshopper, 17 

 spider, 27; crayfish or lobster, 35 

 Nereis, 63 ; mussel, 93 ; clam, 107 

 snail, 116 ; squid, 129 ; Molgula, 139. 



Sand-flea, 48. 



Schizopodous crustacean, 52 ; see Ap- 

 pendix, under Malacostraca. 



Sea anemone, 178. 



Sea cucumber, 155. 



Sea urchin : external parts, 149 ; di- 

 gestive system, 151 ; genital system, 



