INDEX 



321 



nricronucleus, 9, 13, 15 



microzooids, 15 



midbrain, 174, 228, 240, 292 



mid-gut, 103, 118 



middle commissure, 295 



miracidium, 49 



mites, 128 



monad, 16 



Mollusca, 60 



Monocystis, 25 



morphology, 17 



mosquito, 27, 125 



motor nerves, 176, 185, 304 



moulting, 92, 111 



mouth, Amoeba, 5 



Paramecium, 10 



Vorticella, 13 



Hydra, 32 



Distoma, 46 



Anodonta, 65 



Lumbricus, 77 



Nereis, 89 



Nephrops, 101 



Blatta, 118 



Amphioxus, 133, 135, 150, 152 



Raia, 156, 163 



Eana, 196, 231 



Lepus, 275 



Mouth appendages, 94, 115, 125 

 Mullerian duct, 187, 223, 306 

 muscles, 62, 63, 72, 78, 100, 133, 



134, 167, 207, 271, 273 

 muscle segments, 133, 148 

 musculi pectinati, 286 

 mussel, 61 

 Mya, 61 

 myocoel, 138, 147, 167, 207, 230, 



246, 281 



myonemes, 11, 13 

 myotomes, 133, 134, 147, 167, 245, 



246, 252, 281 

 Myriopoda, 91 

 Mytilus, 64 



nacreous layer, shell, 63 

 nasal capsule, 161, 261, 265 



nerve, see olfactory 



organ, see olfactory 

 nasoturbinal, 266 

 nauplius larva, 110. 

 navicular, 270 

 nematoblast, 33 

 Nematoda, 60 

 Nematomorpha, 60 

 Nemertinea, 45 

 nephridiopore, 78, 83 

 nephridium, 83 

 Nephrops, 91 



nephrostome, 83, 186, 222 

 nephrotome, 185, 221, 305 

 Nereis, 89 

 nerve, nerve cell, nerve fibre, see 



nervous system 

 nervous system, Hydra, 33 



Obelia, 42 



Distoma, 47 



Taenia, 52 



Anodonta, 70 



Lumbricus, 84 



Nephrops, 106 



Blatta, 120 



Amphioxus, 140 



Raia, 174 



Rana, 215 



Lepus, 291 



nervus terminals, 176, 217, 296 

 neural fold, 227, 238 



groove, 141, 193 



plate, 145, 227, 238, 250 



spine, 159, 198, 257 

 neurenteric canal, 146, 193, 227, 238, 



250 



neuromeres, 175 

 neuron, 84 



neuropore, 146, 240, 250 

 nictitating membrane, 256 

 Norway lobster, 91 

 nose, 156, 179, 219, 266, 279, 300 

 notochord, 134, 145, 158, 193, 198, 



229, 236 

 notum, 116 

 nuclear membrane, 18 

 nucleolus, 6 

 nucleoplasm, 2 

 nucleus, 2, 18 

 nymph, 114, 126 



Obelia, 39 



obturator foramen, 269 



occipital, 200, 261 



oculomotor nerve, 176, 217, 296 



oesophageal gland, 79 



oesophagus, 118, 164, 206, 275 



olfactory lobe, 215, 292 



nerve, 176, 217, 296 



olfactory organ, Nephrops, 108 



Blatta, 121 



Amphioxus, 140 



Raia, 179 



Rana, 219 



Lepus, 300 



Oligochaeta, 76 

 ommas, 121 

 ommatidium, 121 

 omosternum, 203 

 Onchocotyle, 154 



