INDEX. 
Ophiothrix (?pentaphyllum), breeding, 
228 
Ophryotrocha puerilis, breeding, 225 
Orcynus thynnus, 276 
Oscanius membranaceus, 211, 219 
Ovaries of fishes, the, 154 
Oxidation of ammonia in sea water, 
304 
eS 
Palzmon serratus, breeding, 227 
— squilla, breeding, 227 
Palzmonetes vulgaris, breeding, 227 
Palinurus vulgaris, breeding, 227 
Pandalus annulicornis, breeding, 227 
—- — in Colne, 274 
— — in Humber, 92 
— brevirostris, breeding, 227 
Paracelsus parvus, 231 
Paralichthys oblongus, 244 
Pectinaria, larva of, 234 
Peridiniwm, 234. 
Perigonimus repens, breeding, 223 
Phialidium variabile, 216, 232, 253 
Philine aperta, 211, 219 
— — breeding, 226 
Phoronis hippoerepia, 219 
Phoscolion strombi, 212 
Phyllodoce, larve of, 252 
— maculata, 218 
— — breeding, 225 
Piebald plaice, 271 
Pilchard, hatching of larvex, 151 
— life history of, 148 
— young, 153 
Pilidiwm, 234 
Pilumnus hirtellus, breeding, 228 
Pipe-fishes, development of egg, 258 
— ovary of, 268 
Pirimela denticulata, 222 
Plagiostoma caudatum, 42 
— dioicum, 42 
— elongatum, 42 
— Girardi, 43 
— Koreni, 43 
— pseudo-maculatum, 42 
— sagitta, 42 
— siphonophorum, 43 
— vittatum, 43 
455 
Plaice, ciliation of scales, 194 
— destruction of small, 81, 402 
— dwarf variety, 194, 378 
— growth of, 273 
— life history of, 395 
— numbers landed at Grimsby, 406 
— ovary, 155 
— piebald, 271 
— rearing of, 207 
— size and maturity, 69, 164, 309, 377, 
431, 444. 
— statistics, 124, 170, 289 
— see also Pleuronectes platessa 
Platydoris planata, 220 
Pleuronectes borealis, 195 
-— flesus, coloration of, 197 
— — see also Flounder 
— limanda, 257 
— maculatus, 244 
— microcephalus, 64, 121, 161, 380 
— — see also Merry sole and Lemon 
sole 
— platessa, 195, 257 
— pseudo-flesus, 195 
— — see also Plaice 
Plumularia pinnata, breeding, 224 
— setacea, breeding, 224 
Pluteus, 232, 234, 235 
Podocoryne (Dysmorphosa) carnea, 214, 
232, 234 
— — — breeding, 225 
Podon, 232, 234 
— breeding, 226 
Poliopsis, 3 
Pollack, see Gadus pollachius 
Polycera quadrilineata, breeding, 226 
Polycirrus aurantiacus, breeding, 225 
Polydora, 218, 232 
— breeding, 225 
— larva of, 234, 235 
Polygordius, larva of, 234 
Polynoé, larva of, 235 
Pontobdella, breeding, 225 
Poor cod, size and maturity, 509 
Porcellana longicornis, breeding, 228 
— platycheles, breeding, 228 
— zocea of, 233 
Portunus arcuatus, breeding, 228 
— depurator, breeding, 228 
— holsatus, 178 
