532 
Oncea, sp., 436-58 
Onos mustelus, 221, 437, 456 ; contain- 
ing Pharyngora, 517 
Ophiopluteus, 170, 174, 178 
Otiorrhynchus atroapterus, 512 
— rugifrons, 512 
Oxypoda exoleta, 505 
Oxyrrhis marina, 155, 198 
Oxytelus complanatus, 508 
— perrisi, 508 
Oxytorwm Milner, 186 
P 
Pachylopus (Saprinus) marttimus, 510 
Pailene brevirostris, 169 
Palpicornia, 503 
Panageus bipostulatus, 499 
Paracalanus parvus, 164-78, 437-57 
Paracineta limbata, 158 
Paralia sulcata, 135-42, 170-6, 437-58 
Parapontella brevicornis, 165, 173, 174 
Peachia sp., 162, 176 
Pectinaria sp., 164 
Pediculati collected near Plymouth, 
249 
Peridiniales of Plymouth Sound, 183 
Peridinium cerasus, 185, 437 
— conicum, 186 
— crassipes, 186 
— divergens, 171, 186 
— oceanicum, 186 
— orbiculare, 185 
— ovatum, 154, 186, 437-9 
— pallidum, 154, 186, 437 
— pedunculatum, 186 
— pellucidum, 154, 186 
— roseum, 185 
— sp., 153, 154, 175, 176, 183, 437-51 
— Thorianum, 186 
Perileptus areolatus, 501 
Pheocystis, 137, 152, 154, 176, 450 
— Pouchetiz, 175, 183 
Phalerta cadaverina, 513 
Pharyngora bacillaris, 57, 162; in 
Sagitta, 202 ; in other hosts, 203 ; in 
fishes, 517 
Phialidium hemisphericum, 161, 170-8 
— containing Anaphia petiolata, 51 ; 
Pharyngora bacillaris, 57; Peachia, 
160 
INDEX. 
Philonthus eruentatus, 507 
— punctus, 507 
Phosphoric Acid in sea-water, 122, 251 
Phylan (Heliopathes) gibbus, 513 
Phytophaga, 511 
Phytosus balticus, 506 
— migriventris, 506 
— spinifer, 506 
Plaice, scale investigations, 470 
Pleurobrachia pileus, 162, 170-3; host 
of Pharyngora bacillaris, 57 
Pleuronectes flesus, 443, 450 
— limanda, 229, 435-50 ; containing 
Trematodes, 514, 516 
— microcephalus, 229, 437, 448, 451; 
containing Trematodes, 514, 516 
— platessa, 443; containing Trema- 
todes, 514 
Pleuronectidee collected Ply- 
mouth, 229, 443; age and rate of 
growth, 404 
Pleurosigma sp., 151, 437-51 
Podocotyle atomon, in Gasterosteus, 517 
Podon intermedius, 166-78, 4385-55 
Poecilochetus serpens, 163, 174 
Pogonus chalceus, 501 
Polycera quadrilineata, 169 
Polychaetes possessing a heart-body, 
65 
Polydrusus chrysomela, 512 
Polykrikos Schwarzit, 198 
Polynoé, sp., 163 
Polystomella, 156 
Pontosphera Huxleyt, 155, 170, 171 
Porcellana, sp., 168-77, 439 
Portunus, sp., 169, 174-7 
Post-larval Teleosteans collected near 
Plymouth, 207 
Pouchetia armata, 154, 176, 198 
— fusus, 198 
— parva, 138, 198 
Prorocentrum micans, 135-9, 154, 170-8, 
184, 437-57 
Protoceratiwm reticulatum, 185 
Psammobius porcicollis, 498, 510 
near 
Pseudocalanus elongatus, 164-78, 435- 
59 
Pseudocuma cercaria, 167 
Psilothrix cyaneus, 511 
Psylliodes mareida, 511 
