554 



INDEX 



J'omutoceros, habitat, 300, 340 



P.mphulyx, 201, 203, 33S 



Poutobddla, 393, 401, 404, 406 



Pontodora, 314 



Pontodrilus, 366, 370, 383 



Pontoscolex, 350, 366, 387 f. ; chaeta, 

 351 



Pore, in Polyzoa, 471, 482, 522, 524 ; 

 median, 484, 524 ; dorsal, 348 



Purella, 516, 518, 522, 527, 529 



Porina, 518, 527, 529 



Potamilla, 338 



Praeoral lobe ( = Prostomium), 245, 439 



Predaceous worms, 304 



Priapuloidea, '412, 446 ; anatomy, 430 ; 

 classification, 432 ; habits, 433 



Priapultis, 430, 431, 432 ; anatomy, 430 f. 



Pristbui, 377 



Proales, 204, 224, 226, 227 



Proboscidae, 49 ', occurrence, 44 



Proboscis, of Nemertinea, 100, 101 f., 103 

 f. ; of Hoplonemertea, 104, 110 ; open- 

 ing by mouth, 117, 119; severance of, 

 116 ; of Acanthocephala, 174 f . ; of 

 Rotifers, 203 ; of Kinorhyucha, 237 ; 

 of Echiuroidea, 434 



Proboscis-pore of Nemertinea, 102, 103 



Proboscis-sheath of Nemertinea, 103, 103 f. 



Procerodes, 42 



Procerodidae, 42 



Procerus, host of Gordius, 172 



Procotylm, 36, 42 



Proglottis, 5, 74, 75, 79, 85 



P i-omesostoma, occurrence, 44 ; British 

 species, 49 



Proporidae, 4$ 



Pniporiis renenosvs, Jfl 



Prorhynchidae, 4<J 



Prorhynchus sphyrocephcdus, terrestrial 

 habit, 44 ; P. stagiw.lis, 49 



Prosurhochmus claparedii, 110. 114, 117 



Prostate - gland, of Leptoplana, 16; of 

 Polyclads, 30 ; of Planaria, 39 ; of 

 Rhabdocoela, 47 ; of Oligochaeta, 361 



Prostheceraeits, 19, 22 ; spermatophores, 

 27 



Prosthiostomatidae, 19 



Prosthiostmnum, 17, 18, 19, 24 



Prostomial tentacles, 248, 262 



Prostomium, 241 ; of Dinophttus, 243 ; of 

 Polyyordius, 244 ; of Trochosphere, 245 ; 

 of Nereis, 248 ; of Polychaeta, 259 ; of 

 Glyceridae, 320 ; of Terebellidae, 327 ; 

 of Oligochaeta, 348 



Protodrilus, 242, 244 



Protonemertini, 112 



Protida, 341 ; genital organs, 273, 274 ; 

 eggs, 275 



Prouho, on Poly/oa, 489, 507 f. 



Provisional chaetae, 274 



Provvrtex, British species, 50 



Proxenetes, 44 ; British species, 49 



Pruvot, on Polychaeta, 261 



J'samnlhe, 300, SOS 



Psammolyce, 313 ; elytra, 294, 313 



Pseiidalius, 135, 142, 163 



Psevdaxine, 73 



Pseudoceridae, 19, 20 



Pseudoceros, 19, 20 



Pseudocotyle, 73 



Pseudorhynchus bifid us, 49 



J'sygmobranchus, 341 



Pterobranchia, 461 



Pterodina, 200, 201, 203, 206, 211, 215, 



216, 23, 226, 230 

 Pterodinidae, 201, 225 

 Pteroessa, 224 

 Pteronella, 73 

 Pterostichus niger, infested by Gordius, 



170, 170, 172 



Pterosyllis, ciliated lappets, 273 n. 

 Pyriform organ, 509, 511 



QCATREFAGES, on Gephyrea, 411, 445 



RABBIT, parasites of, 141, 145 



Ragworm, 322 



Railliet, on Cestodes, 91 



Rami, in Rotifers, 210 



Rasping plate, of Eunicidae, 270 



Rattulidae, 210, 225 



Rattulus, 212, 235, 226 



Ratzel, on Earthworms, 350 



Red Cat, 316 



Regeneration of lost parts, in Polyclads, 

 26 ; in Triclads, 40 ; in Cestodes, 77 ; 

 in Nemertinea, 115 ; in Polychaeta, 

 278, 282 ; in Oligochaeta, 348, 379 ; in 

 Polyzoa, 471, 488 



Repetition of parts, 249 



Replacement of species, 300 



Reproduction (and Reproductive organs), of 

 Leptoplana, 14 f. ; of Polyclads, 26, 30 ; 

 of Triclads, 31, 38, 39 ; of Rhalxlocoe- 

 lida, 45, 47 f. ; of Temnocephala, 54 ; of 

 Polystomatidae, 57 f. ; of Diplozoon, 

 60 ; of Digenea, 65 ; of Callwbothrium, 

 76 ; of Schistocephcdus, 86 ; of Mesozoa, 

 93 f. ; of Nemertinea, 102, 103, 104, 

 109 ; of Nematoda, 134 ; of Nemato- 

 morpha, 166, 169 ; of Acanthocephala, 

 178 ; of Chaetognatha, 188 ; of Roti- 

 fera, etc., 216, 234, 238 ; of Archianne- 

 lida, 243 f. ; of Polychaeta, 253, 254, 

 256, 269, 273 ; of Myzostnvia, 343 ; of 

 Oligochaeta, 360 ; of Leeches, 401 ; of 

 Gephyrea, 418, 431, 437 ; of Phoronis, 

 457 ; of Polyzoa, 471, 490, 501, 506 

 see also Ovary and Asexual reproduction 



Reptiles, parasites of, 163 



Respiration, in Nereis, 252 ; in Chaetopoda, 

 272 ; in Gephyrea, 416 



Retepom, 479, 515, 51S, 527 



Rhabdites (rods), of Ltptoplami, 11, 12 ; in 



