552 



INDEX 



Paludicola, 30, 42 



Panthalis, 313 



Paragnaths, 248, 250, 316 



Parapodium, of Nereis, 246, 247 ; of Poly- 



chaeta, 264 f. ; of Heteronereid, 276, I 



277 ; muscles of, 247 ; glands of, 249, 



314 ; of Myzostoma, 342 

 Paraseison, 212, 225, 226 

 Parasitic, Turbellaria, 51 ; Polyclads, 22 ; 



Triclads, 32 ; Rhabdocoela, 45, 51 ; 



Nemertiuea, 101, 119 ; Rotifers, 204, 



227 ; Polychaeta, 297 ; Leeches, 406 

 Parasitism, effect on the parasite, 161, 177; 



effects on the host, 162 

 Parenchyma, in Leptoplana, 11, 12 ; of 



Miiller's larva, 29 ; in Triclads, 41 ; in 



Acoela, 42 ; in Cestodes, 85, 86 

 Parovaria, of Phagocata, 38 n. 

 Parthenogenesis, amongst Rotifers, 200 

 Pectinaria, 330 ; body, 259 ; tube, 285, 



287 ; P. auricoma, tube, 288 ; P. belgica. 



330 

 Pectinatella, 496, 497, 505, 512, 518; 



statoblast, 502 

 Pedalion, 200, 201, 206, 211, 216, 228, 



224, 225, 228, 230 

 Pedalionidae, 238 

 Pedetes, 224 

 Pedicellina, 487, 488, 490, 506, 507, 518 ; 



larva, 510, 513 ; budding, 514 ; on 



Polychaeta, 299 

 Pelagic, Nemertinea, 101, 114 ; Chaeto- 



giiatha, 189 ; Rotifera, 226 ; Polychaeta, 



291, 294, 314 ; larvae of Polychaeta, 



300, of Polyzoa, 520 

 Pelagobia, 314 

 Pelagonemertes, 101, 114 

 Pelodera, 129, 131, 133 

 PelodrUns, 369, 377 

 Petodytes, 134 

 Penis, of Leptopla>ia, 14, 15 ; of Polyclads, 



27 ; of Planaria, 38, 39 ; of Rhabdo- 



coelida, 47 ; of Temnocephala, 64 ; of 



Calliobothrium, 76 ; of Schistocephalus 



(cirrus-sac), 86 



Pennant, on Hirudinea, 406 n. 

 Pereyaslawzewa, on Acoela, 44 n. 

 Pergens, on Polyzoa, 500 

 Perichaeta, 351, 357, 358, 372, 381, 381 f., 



388, 394, 403 



Perichaetidae, 357, 362, 3SO 

 Perienteric, blood-sinus, 252 

 Perionyx, SSI 

 Pcrissoyaster, 383 

 Peristome, 481, 482, 622, 524 

 Peristomial (tentacular) cirri, of Nereis, 



218 ; of Polychaeta, 263 ; nerves to. 254 

 Peristominm, of Nereis, 248 ; of Poly- 

 chaeta, 263 ; of Sabellidoe, 336 

 Perrier, on Oligochaeta, 367, 385 

 Petalostoma, 422, 42G, 430, 447 

 Petromyzon, host of Qordius, 173 



Petta, intestine of, 271 

 Phagocata, 31, 32 

 Phalacroplwrus, 314 

 Phanerocephala, 258, 303 

 Pharynx, 4 ; of Leptoplana, 8, 9, 12, 14 ; 

 of Polyclads, 17, 24 ; of Discocelis, 23 ; 

 development of, in Polyclads, 29, 30 ; of 

 Triclads, 31, 37, 39 ; of Temnocephala, 

 53, 64 ; of Polystomatidae, 56 ; of 

 Digeuea, 62, 64 ; of Nereis, 249, 260, 

 261 ; of Polychaeta, 269 

 Pluiscolion, 423, 425, 428 

 Phascolosoma, 416, 420, 423, 425, 428, 



447 ; as host of Loxosoma, 489 

 Philippi, on Hirudinea, 406 

 PhUodina, 208, 282, 227 

 Philodinidae, 222 



Phoronis, 450 f., 461, 462, 463, 466 ; 

 habits, 451 ; anatomy, 453 f., 457 ; 

 development, 458, 468 ; species, 460 ; 

 affinities, 461, 512 



Phosphorescence (and light - producing 

 organs), in Rotifers, 226 ; in Poly- 

 chaeta, 272, 295, 296 ; in Oligochaeta, 

 368 ; in Polyzoa, 478 

 Photodnlus, 368, 383 

 Photogen (light - producing organ), of 

 Polyophthalmus, 272 ; of Tomopteris, 

 296, 316 



Phreodrilus, 369, 579 

 Phreoryctet, 367, 377 

 Phreoryctidae, 376 

 Phylactella, 528, 530 

 Phylactolaemata, 476, 493 f., 518 ; lopho- 

 phore, 476, 495 ; occurrence, 493 ; 

 movements, 494, 496 f. ; reproduction, 

 501, 506, 507 ; larva, 511, 512 ; distri- 

 bution, 493, 504 ; affinities, 512 

 Phyllacanthinae, 91 

 Phyllobothrinae, 91 

 Phyllobothrium, 76n.,91 

 Phyllocotyle, 73 



PhyUodoce, 313, 314 ; head, 262, 263 : 

 eggs, 275, 314 n. ; colours, 291, 292 ; 

 parapodium, 264 ; chaeta, 267 

 Phyllodocidae, 258, 313 ; parapodial cirri, 

 266 ; as food, 297 ; eggs, 314 ; colours, 

 292, 293 



Phyllodocites, 302 

 Phyllonella, 73 

 Phymosoma, 413, 420, 421, 423 f., 425, 



426 



Physaloptera, 163 



Pig, parasites of, 68, 79, 139, 147, 184 

 Pigments, of Polychaeta, 291 f.; of Gephy- 



rea, 435 



Pike, Trematode of, 62 ; Cestode of, 81, 84 

 Pilidium larva, 113, 113, 229, 230 

 Piononyllis, 30S 

 Piscicola, 393, 406 

 Pista, 32S ; gill of, 329 

 Pits, ciliated, of Polychaeta, 272, 273 



