INDEX 



209 



Lithobius, 20. 

 Lobster, see Crayfish. 

 Loligo pealii, 113. 



Macruran decapod, 22. 



Molgula : external parts, 125 ; digest- 

 ive system, 126 ; reproductive sys- 

 tem, 127 ; circulatory system, 127 ; 

 nervous system, 128 ; excretory sys- 

 tem, 128 ; peribranchial chamber, 

 128 ; respiratory system, 129. 



Mollusca : freshwater mussel, 83 ; 

 hard-shell clam, 93 ; land snail, 102 ; 

 squid, 113. 



Mussel, see Freshwater mussel. 



Mya arenaria, 93. 



Myriapoda, 20. 



Naked rhizopod, 174. 



Nereis : external parts, 55 ; parapodia, 

 57 ; internal anatomy, 57 ; digestive 

 organs, 58 ; circulatory system, 58 ; 

 excretory system, 59 ; nervous sys- 

 tem, 59 ; reproductive system, 60. 



Nervous system : grasshopper, 16 ; 

 crayfish or lobster, 35 ; crab, 38 ; 

 Daphnia, 51 ; Nereis, 59 ; earth- 

 worm, 68 ; planarian, 72 ; tapeworm, 

 76 ; Bugula, 81 ; mussel, 91 ; hard- 

 shell clam, 101 ; snail, 111 ; squid, 

 123; Molgula, 128; starfish, 137; 

 sea urchin, 144 ; medusa, 154, 160. 



Obelia, 155. 



Oligochaetous annelid, 61. 

 Oniscus, 40. 

 Orthopterous insect, 7. 



Paramecium : general form, 164 ; re- 

 production, 167 ; conjugation, 167. 



Pennaria, 149. 



Phyllopod, 50. 



Planarian worm : external parts, 70 ; 

 digestive system, 71 ; reproductive 



system, 71 ; nervous system, 72 ; 



excretory system, 72. 

 Platyhelminthes : planarian worm, 70; 



tapeworm, 74. 

 Polychaetous annelid, 55. 

 Polyzoa, 79. 

 Porcellio, 40. 

 Protozoa: Paramecium, 165; Vorti- 



cella, 168 ; Euglena, 172 ; Amoeba, 



174. 

 Pulmonate gastropod, 102. 



Reproductive system : grasshopper, 

 14 ; caterpillar, 19 ; crayfish or lob- 

 ster, 33 ; copepod, 49 ; Daphnia, 51 ; 

 Nereis, 60; earthworm, 65; plana- 

 rian, 71; tapeworm, 76; Bugula, 

 81; mussel, 91; clam, 100; snail, 

 110 ; squid, 122 ; Molgula, 127 ; star- 

 fish, 135 ; sea urchin, 142 ; Hydra, 

 147 ; tubularian, 154 ; campanula- 

 rian, 159; Grantia, 163; Parame- 

 cium, 167 ; Vorticella, 170 ; Euglena, 

 173; Amoeba, 175. 



Respiratory system : grasshopper, 15 ; 

 crayfish or lobster, 29 ; Nereis, 57 ; 

 mussel, 87 ; clam, 97 ; snail, 106 ; 

 squid, 119; Molgula, 129. 



Rhizopoda, 174. 



Sand-flea, 42. 



Schizopodous crustacean, 46 ; see Ap- 

 pendix, under Malacostraca. 



Sea urchin : external parts, 139 ; di- 

 gestive system, 141 ; genital system, 

 142; ambulacral system, 143; nerv- 

 ous system, 144 ; circulatory system, 

 144. 



Sessile ciliate, 168. 



Shrimp, freshwater: external parts, 

 42 ; appendages, 43. 



Simple ascidian, 125. 



Siphonate lamellibranch, 93. 



Slipper animalcule, 164. 



