494 



INDEX 



Opistotrichium 291 

 Ordovicium 185 

 Orthogon 128 

 Orthonectoida 366, 367 

 Osteichthyes 456, 457, 461 

 Ostracodermata 446, 456, 457 

 Ostroumovia 108 

 Otohjdra 51, 9 J 

 Otomesostoma 314 



Paedogenesis 39 



Paedomorphosis 444 



Palaeostraca 416 



Palintomy 361 



Palwenia 169 



Palombi 91, 237 



Pantin 127, 130 



Parabronema 58 



Parallelism 65, 440 



Paraph am stoma 140 



Parapodia 270, 420 



Parasitism 46, 192, 253, 339, 366, 



454, 391 

 Paratomy 215 

 Parazoa 1, 2, 4, 8, 331, 337, 350, 362, 



368,371 fF. 

 Parenchyma 314 

 Parenchymatosa 390 

 Parenchymella 25, 26, 205, 365 

 Parthenogenesis 290, 293 

 Patten 442 

 Paucinucleata 312 

 Paurometamera 393 

 Pauropoda 416 

 Pax 24, 99, 100, 149, 175, 246 

 Pears 243, 244, 366, 389, 414 

 Pecten 135 



Pegantha 11\, 263 (larva) 

 Pelagia 137 

 Pelagic zone 48 

 Pelagothuria 428 

 Pennaria 5i, 91, 110 



Pcnnatulacea 109, 232 



Pentacrinus 261 



Pentamery 184 



Pentastomida 413, 417, 419, 423 



Pericardium 430 



Periderm 107, 109, 195, 199, 233 



Perigastrocoel 25, 26, 41, 130, 164, 



249, 270, 392, ff. 

 Perineura 376 

 Perrier 78, 86, 87 

 Person (subindividuum) 116, 154, 



312,370, 405 

 Petrunkewitch 24 

 Peysonell 74 

 Phallonemertes 147 

 Pharynx 163, 183 ff. 

 Phascolion 433 

 Phoronoidea 405, 427, 429, 431, 433, 



439, 448, 461 

 Photosynthesis 354 

 Phylembryogenesis 42, 44 

 Phylogeny 29, 35, 44, 52, 114, 185, 



204 ff. 

 Phyta 354 



Phytoflagellata 49, 355, 356, 359 

 Phytology 356 

 Phytomonadida 365 

 Phytoplancton 48 

 Phytozoaires 86, 87 

 Pilidium 43 

 Pinacocyte 7 

 Pinacoderm 3 

 Pisces 455, 457 

 Placula 25 

 Planar ia 215, 314 

 Planctonic way of life 10, 49j 



60, 261 ff. 

 Planea 276 

 Planula 25, 38, 39, 80, 89, 158, 193, 



206, 207 ff. 

 Planularia 367 

 Planulozoa 367 

 Plasmodial state 309, 311, 314-318 



