544 



INDEX 



62 ; in Cestodes, 86 ; in Neniertinea, 

 108, 109; in Rotifers, 213; in Urna- 

 ti'llu, 491 



Fletcherodrilus, 382 



Floseidaria, 200, 203, 205, 220, 221, 226 



Flosculariaceae, 202, 211, 213, 220 



Floscolariidae, 201, 203, 205, 220 n., 221, 

 230 



Flukes, 51 



Flustra, 465, 466, 467, 472, 473, 477, 515, 

 518, 526 ; avicularia, 482 



Flustrella, 467, 477, 518, 532 ; larva, 513 



Flustrina, 518 



Food, of Turbellaria, 4 ; of Leptoplana, 

 10 ; of Polyclads, 24 ; of Triclads, 37 ; 

 of Acoela, 43 f. ; of Rhabdocoela, 45 ; 

 of Trematodes, 4, 52, 62 ; of Temnoce- 

 [>hxda, 53 ; of Cestoda, 5 ; of Nenier- 

 tinea, 115 ; of Nematodes, 131 ; of 

 Acanthocephala, 177 ; of Chaetognatlia, 

 190 ; of Rotifera, 207, 212 ; of Gastro- 

 tricha, 234 ; of Polychaeta, 296 ; of 

 Earthworms, 359 ; of Leeches, 393, 

 406 f. ; of Gephyrea, 422, 443 ; of 

 Polyzoa, 467 



Foot, in Rotifers, 200, 201 



Foraminifera, as food of Polychaeta, 296 



Forceps, of Eunice, 270 



Forcipate, 210, 211 



Formula, for Nematoda, 138 



Fornix, 481, 517, 525 



Fossil, Polychaeta, 301 ; Polyzoa, 520 ; 

 Neniertinea, absence of, 119 



Fredericella, 476, 494, 502-505, 518, 519 ; 

 lophophore, 495 ; statoblast, 502, 503 



Frenzel, on Trematoda, 62 ; on Scdinella, 

 96 



Fresh -water, Turbellaria, compared with 

 marine, 46 ; Neniertinea, 101, 118 ; 

 Polychaeta, 284 ; Polyzoa, 492 



Friend, on Oligochaeta, 388 n. 



Frogs, Trematodes of, 55, 58, 62, 71 f. ; 

 Nematodes of, 140, 142, 160, 173 



Frontal organ, of Nemertinea, 107 



Frontal palps, of Eunicidae, 318 f. 



Frontal ridge, 260 



Frtdlania, inhabited by Rotifers, 227 



Fulcrum, in Rotifers, 210 



Funicular tissue, 471 



Funiculus, 469, 471, 472, 499, 501 



Ficradaria, 216, 224, 226 



Gamble, on Platyhelminthes, 3 f . ; " on 

 Mesozoa, 92 f. 



Gammarus, Rotifers attached to, 227 



Gapes, cause of, 144 



Gardiner, on development of Acoela, 44 n. 



Gasterostomatidae, 73 



Gasterostomum, 73 ; G. fimbriatum, life- 

 history, 72 ; G. gracilescens, 72 



Gastrocotyle, 73 



Gajtrodiscus, 73 



Gqstrothylax, ;,; 

 Gastrotricha, 231 f. 

 Gegenbaur, on Nemertine development 

 99 



Gemellaria, 518, 526 



Gemmation, 281 ; in Syllidae, 278 f., 27? 

 280 



Geobia, 37 



Geodesmus, 34, 42 



Geographical distribution, of Turbellari 

 32 f. ; of Neniertinea, 117 ; of Ohaeto- 

 gnatha, 191, 534 ; of Gastrotricha, 235 ; 

 of Polychaeta, 299 f. ; of Oligochaeta, 

 369 f. ; of Leeches, 405 ; of Gephyrea, 

 426 f., 432, 441 f. ; of Phoronis, 460 ; 

 of Polyzoa, 492 f., 504, 519 



Geonemertes, 101 ; description of G. chall- 

 cophora, 117 



Geoplana, 33, 38, 42 



Geoplanidae, 35, 42 



Geoscolicidae, 351, 362, 386 



Gephyrea, 411 f. ; history, 411 ; externa 

 characters, 412, 420 f., 430 f., 434 f., 

 444 ; body -wall, 414, 436 ; digestive 

 system, 414, 422, 430, 436, 445 ; vas- 

 cular system, 415, 421, 436 ; respira- 

 tory system, 416; body -cavity, 416, 

 437, 445 ; nervous system, 416, 431, 

 437, 445 : excretory system, 417, 423, 

 431, 437, 445 ; reproductive system, 

 418, 431, 437, 445 ; development, 419, 

 439 ; food, 422, 443 ; conimensalism, 

 429 ; affinities, 241 n., 336, 445 f., 

 512 ; British, 449 



Germarium, of Rotifers, 216 



Germ-yolk-gland, 47 



Giard, on Oligochaeta, 368 



Gid, induced by Coennrus, 82 



Gigantorhynchidae, 183 



Gigantorhynchus gig as, 174, 177, 184 ', 

 G. echinodiscus, G. spira, G. taenioides, 

 184 



Gills, of Polychaeta, 252, 265, 268 f. ; of 

 Arenicola, 333 ; of Chlorhaemidae, 334 ; 

 of Cirratulus, 326 ; of Kaphrosyne, 265, 

 318 ; of Eunicidae, 318 ; of Nereis, 246 ; 

 of Sabelliforniia, 260, 261 ; development 

 of, 275 ; of Sabella, 286 ; colour of, 294 ; 

 of Sabellaria, 263 ; of Herpulidae, 261 ; 

 of Stemaspis, 336 ; of Sigalionina, 313 ; 

 of Terebellidae, 329 ; of Oligochaeta, 

 352, 353 ; of Leeches, 395 ; of Gephyrea, 

 416 



Gizzard, in Rotifers, 199, 210; in Poly- 

 chaeta, 271, 307 ; in Oligochaeta, 358 ; 

 in Polyzoa, 477, 480, 532 f. 



Glands, onparapodia, 249 ; of Pliyllodocids, 

 314 ; oesophageal, 271, 272, 358 ; tube- 

 forming, 287, 304, 327 



Gland shields, 287, 304, 306 ; of Sabellids, 

 337 ; of Terebellids, 327 



Glandular papillae, of Polygordius, 244 



