276 



IN VERTEBRA TE ZOOLOG Y 



Ovigerous legs, 230 

 Oviparous, 18 

 Ovipositors, 76, 243 

 Ovoviviparous, 18 

 Oxytricha, 57 

 Oysters, 186, 187 



Paedogenesis, 17, 205 

 Pagurus, 223 

 Palaemon, 223 

 Palaemonetes, 223 

 Palingenetic, 255 

 Pallia! line, 187 

 Palola worm, 149 

 Palpi, 188 

 Paludicella, 164 

 Pandinus, 234 

 Pandorina, 33, 56 

 Parabasal bodies, 31 

 Paradoxides, 209 

 Paragonimus, 126 

 Paragordius, 133, 136 

 Parajulus, 234 

 Paramecium, 51, 57 

 Parapodia, 147, 148 

 Paraseison, 143 

 Parasitic habits, 23, 111 

 Parazoa, 82 

 Parenchyma, 81, 105 



digestive, 110 

 Parietal ganglion, 189 

 Parthenogenesis, 17, 212 

 Pasteur, 48 

 Patella, 196, 201 

 Patten, 260 



Pauropoda, 205, 232, 233, 234 

 Pauropus, 234 

 Pebrine disease, 47 

 Pecten, 187, 188, 201 

 Pectinatella, 160, 161, 164 

 Pectines, 227 

 Pedal ganglion, 184, 189 

 Pedalion, 140, 143 

 Pedata, 182 

 Pedicellariae, 167, 170 

 Pedicellina, 161, 164 

 Pedipalpi, 226 



Peduncle, 162, 163 



Pelecypoda, 186 



Pelmatozoa, 169, 182 



Pelomyxa, 57 



Peneus, 223 



Pennatula, 103 



Pennatulacea, 103 



Pentacrinus, 181, 182 



Pentastoma, 230, 234 



Pentastomida, 230 



Peranema, 33, 56 



Pericardial sinus, 220 



Pericardium, 188 



Perichaeta, 153, 157 



Pericolpa, 102 



Peridinium, 56 



Peripatus, 231, 234, 258 



Peripheral nervous system, 67, 78 



Periphylla, 102 



Periproct, 175 



Perisarc, 89 



Peristome, 175 



Peritricha, 50, 57 



Peromedusae, 102 



Perradii, 96 



Petasus, 102 



Phacellae, 95 



Phacus, 56 



Phalangida, 229, 230, 234 



Phalangium, 234 



Phanerozonia, 182 



Pharyngeal basket, 50 



Phascolosoma, 157, 158 



Philodina, 143 



Pholads, 180, 201 



Phoronida, 159, 103, 164 



Phoronis, 163, 164 



Phosphorescence, 33 



Phylactolaemata, 164 



Phyllocarida, 217, 223 



Phyllopoda, 206, 209, 210, 222 



Phylogenetic relationships, 2, 4, 253 



Phylogeny, 253 



Physa, 193, 201 



Physalia, 93, 102 



Phytomastigina, 31, 56 



Phytomonadina, 56 



Pilidium, 106, 124 



Pill bugs, 222 



