INDEX 



287 



Phreatoicidea, 173 



Phronima, 154 



Phronimidse, eyes of, 154 



Phtisica, 54 



Phyllocarida, 261 



Phyllosoma, 149 ; of Spiny L,ob- 

 ster, 72 



Phylogeny, 205, 256 



Pill Millipede, 203 



Pink Shrimp, 137, 245 



Pinnaxodes, 218 



Pinnotheres, 217 ; used for 

 food, 249 



Planes, 155 



Plankton, 139 ; of fresh water, 

 160; of lakes, 168, 170 ; rela- 

 tion to fisheries, 250 



Platyarthrus, 205 



Platycuma, 129 



Platymaia, 130 



Platytelphusa, 184 



Pleuron, 9 



Podocopa, 39 



Podocrates, 269 



Pollicipes used for food, 237 ; 

 fossil, 261 



Polycheles, 133 



Pontonia, 218 



Pontoporeia, 181 



Porcelain Crab : zoea of, 70; 

 autotomy, 114 ; feeding, 115 ; 

 and Hermit Crabs, 215 



Porcellana : zoea of, 70; au- 

 totomy, 114; feeding, 116 



Porcellanidae, 60 



Porcellio, 51 ; structure and 

 habits, 202 ; distribution, 

 206 



Portunidae : swimming, 90 ; 

 sand-burrowing, 99 ; used 

 for food, 249 



Potamobiidae, 176 



Potamobius, 174 



Potamon, 180 ; young of, 78 



Prceanaspides, 265 



Prawns, 58 ; luminosity of, 

 127 ; of deep sea, 136 ; of 

 fresh water, 174, 179; of 

 Tanganyika, 183 ; blind, in 

 caves, 185 ; in Sponges, 210; 



Isopods parasitic on, 221 ; 



Common, 245 ; used for food, 



245 ; deep-water, 247 ; fossil, 



268 



Prosoponidae, 135, 269 

 Protandrous hermaphrodit- 



ism, 221 



Protective resemblance, 108 

 Protocarcinm , 269 

 Protocaris, 260 

 Protopodite, 10 

 Protozoea of Penczns, 75 

 Psathyrocaris, 130 

 Pse^^dothelphusa, 193 

 Pseudo-tracheae, 202 

 Pygidium, 259 

 Pygocephalus, 263 

 Pylocheles, 94 

 Pylochelidae of deep sea, 136 



Recapitulation, theory of, 86 



Red -clawed Crayfish, 242 



Regeneration in I/obster, 30 



Relict faunas, 182 



Remipes, 102 



Reproduction of Cladocera, 

 1 66; of Leptodora, 169; of 

 Cymothoinae, 220 



Reptantia, 59 



Respiration in sand-burrowing 

 Crabs, 99 ; in amphibious 

 Crabs, 106 ; in I/and Crabs, 

 193 ; in Ccenobita, 195 ; in 

 Birgus, 196; in I/and Iso- 

 pods, 20 1, 202, 203 



Resting eggs of Cladocera, 

 1 66 ; of Copepoda, 170 



Resting stage of Copepoda, 

 171 



Reversal of asymmetry in 

 Lobster, 30 



Rhizocephala, 43 ; larvae, 84 ; 

 structure and development, 

 231 



River Crabs: young of, 78; 

 habits and distribution, 180; 

 development of, 193 



River Prawns, 179 ; used for 

 food, 248 



Robber Crab, 61, 94; habits 



