286 



THE LIFE OF CRUSTACEA 



Natantia, 58 ; used for food, 



243 



Nauplius of PencBus, 73 ; of 

 Crayfish, 79; of Opossum 

 Shrimp, 79 ; of Branchio- 

 poda, 80; of Cyclops, 82 ; of 

 Ostracoda, 82 ; of Barnacles, 

 83 ; of Lepas, 148; oi Lepto- 

 dora, 170 ; of Sacculina, 233 ; 

 e3^e, 40 



Nebalia, 44 ; fossil allies, 261 



Nebaliacea, 44 



Necton, 138 



Nematocarcinidse, 128 



Nephrops, 33; larva, 71; dis- 

 tribution, 132 ; fishery, 240 



Nephropsidea, 33, 60 



Nephropsis, 121 



Neptunus, 156 ; used for food, 

 249 



Neritic plankton, 141 



Nervous system of Lobster, 

 20 



Niphargus, 184 



Northern Crayfishes, 176 



Norway Lobster, 33 ; larva, 

 7 1 ; fishery, 240 



Norwegian Prawn, 246 



Notostraca, 36 ; habits, 162 



Oceanic plankton, 141 



Octopus preying on Crustacea, 

 89 



Ocypode, 188; habits, 104; car- 

 nivorous, 195 



Olfactory filaments of Lobster, 



25 



Oniscus, 51 ; structure and 

 habits, 201 



Operculata, 43 



Opossum Shrimps, 46; de- 

 velopment of, 79 



Orchestia, lori 



Orientation, organs of, 24 



Ostracoda, 38; development, 

 81; luminosity, 127, 151 ; 

 plankton, 144 ; fresh-water, 

 172; of Tanganyika, 184; 

 fossil, 261 



Ovary of Lobster, 27 



Oxyrhj^ncha, 64 ; masking 

 habits, 96; fossil, 270 



Oxystomata, 63 ; habits, loi ; 

 protective resemblance, 109; 

 deep-sea, 128; fossil, 269 



Oxyuropoda, 266 



Oyster Crab, 249 



Oysters and Pea Crab, 217 



Paguridea, 61 



Paguropsis and Sea-anemones, 

 214 



Palczmon, 1 79 ; used for food, 

 248 



Pal(Tinonetes, 174 



Palinura, 59 



Palinuridae, 241 ; fossil, 269 



Pa lin?ir2cs,laTva of , 72; fishery, 

 240 



Palp, 14 



Pandahis, 59, 1 37 ; used for 

 food, 245 



Pa7iuli7'2is, 241 



Pai^acyamns, 55 



Paranaspides, 264 



Paranephrops, 177 



Parapagnrus, 124; and Sea- 

 anemones, 213 



Parasitism, 208 



Parastacidse, 176 



Parastacus, 178 



Partan, 248 



Parthenogenesis, 163 ; of Cla- 

 docera, 166 ; of Ostracoda, 172 



Pea Crab, 217 



Pedunculata, 43 



Peltogaste7', 232 



Penseidea, 59; fossil, 267 



Pent^tis, 59 ; larvae, 73 ; used 

 for food, 247 ; fossil, 268 



Peracarida, 46 ; development, 

 78 



Pericardium, 17 



Peripatus, tracheae of, 204 



Peter's stone, 220 



Philomedes, 38 



Phosphorescence. See Lumin- 

 osity 



Photophores of Kuphausiacea, 

 125 



