INDEX 



555 



Polyclads, 29 ; in Triclads, 37 ; absent 

 in parasitic Bhabdocoela, 45 ; in Temno- 

 cephala, 53, 54 



Rhabditiformae, 137 



lihahditis, 154, 160 ; R. nigrovenosa, 140, 

 loo 



Rhabdocoelida, 4, 7, 36, 42 f. ; occurrence 

 and habits, 43 ; parasitic forms, 44 ; 

 reproduction, 47 ; classification, Ifi ; 

 British species, 43, 44, 49 



Rhabdogaster, 158 



Rliabdonema nigrovenosum, 134, 136, 140, 

 151, 160, 161 



Rlutbdopleura, 461 f. 



Wi iaoclrilus, 348 



Rhinopidae, 220 n., 224 



Rhinops, 224 ', male of, 223 11. 



Rhizopoda, as food for Polychaeta, 296 



Rhizota, 220 n. 



Rhombogen (form of Dicyemid), 93 



Rhojpalonaria, 521 11. 



Rliopalophorus, 73 



Rhopalura giardii, occurrence and struc- 

 ture, 94, 95 ; R. intoshii, 94 



Rhynchelmis, 365, 376 



Rhynchobdellae, 396 f., 405 



Rhynchodemidae, 35, j 



Rhynchodemus, 34, 35, 42 



Rhynchopora, 531 



Rhynchozoon, 529 n., 531 



Riches, on British Nemertinea, 110 ; on 

 Malacobdella, 119 



Rietsch, on Gephyrea, 443 



Rockworm, 319 



Rods see Rhabdites 



Rohde, on muscles of Nematoda, 128 f. 



Rootlet, in Polyzoa, 485, 517 



Rosa, on Oligochaeta, 364, 380, 385, 390 



Rosette-plates, 471, 522 



Rotifer, 201, 202, 210, 216, 222, 226, 

 227 



Rotifera, 197 f . ; distribution, 200 ; para- 

 sitic, 204 ; digestive organs , 209 ; renal 

 organs, 213 ; nervous system and sense 

 organs, 215 ; reproduction and develop- 

 ment, 216 ; classification, 220 ; habits 

 226 ; preservation, 228 ; affinities, 229 



Rousselet, on Rotifers, 198, 216, 228 



Sabella, 299, 337 ; parapodium, 265 ; 



habitat, 286 ; tube, 287 ; tube-build ing, 



288 ; colour, 293, 294 ; S. saxicava, 



habits of, 287 

 Sabellaria, 341 ; body, 259 ; cirri, 265 ; 



tube, 287, 290 ; S. alveolata, 259, 300 ; 



S. spinulosa, paleae, 267, 300 

 Sabellidae, 258, 336 ; head, 261 ; chaetae, 



266, 267 ; regeneration, 283 ; from fresh 



water, 284 ; colour, 292 

 Sabelliformia, 258, 806, 336 ; chlorocruorin 



in, 252 ; body, 259 ; head, 260, 261 ; 



uncini, 266, 267 ; nephridia, 269, 306 ; 



genital organs, 273 ; development of 

 gills, 275 ; gland shields, 287 

 Saccobdella, 226 

 Sacconereis, 275, 276, 280 

 Saccosoma, 434, 440, 442 

 Sagitella, 321 

 Sagitta, 186, 186, 191, 534 ; anatomy, 186 



f., 188; development, 189 ; habits, 190 ; 



species, 191, 193 ; American species, 534 



Salensky, on development of Nemertinea, 



99 ; of Rotifers, 218 

 Salinella, 93, 96 

 Salivary glands, in Polyclads, 10, 24 ; in 



Leeches, 396 

 Salmacina, 273, 341 ', brood-pouch, 276 ; 



fission, 281 

 Salpina, 200, 225 

 Salpinidae, 225 

 Sandmason, 328 



Saxicava, Eulalia in borings of, 314 

 Scales, of Gastrotricha, 233 

 Scalibregma, 334 

 Scalibregmidae, 258, 334 

 Scapha, 259, 330 

 Scaridium, 201, 207, 225 

 Schistocephalus, 75, 91 ; reproductive 



organs, 86 ; larva, 84 ; life-history, 78,85 

 Schizocerca, 225 



Schizogamy, in Syllidae, 278, 279, 281 

 Schizonemertea, 109 ; characters, 111 ; de- 

 velopment, 113 ; transverse section, 103 

 Schizoporella, 518, 527, 528, 529, 530, 531 ; 



zooecium and avicularia, 482 ; Lepto- 



plana on, 22 

 Schizotheca, 482, 518, 529 

 Schmarda, on Oligochaeta, 366, 387 

 Schmidt, on Rhabdocoels, 6 

 Schneider, on life-history of certain Meso- 



stoma, 48 ; on classification of Nematoda, 



129 ; on oesophageal glands, 131 ; on 



Strongylidae, 142 

 Schultze, on Polyclads, 13, 26 ; on Nemer- 

 tinea, 108, 109 

 Schidtzia, 50 

 Schulze, F. E., Stichostemvia found by, 



118 ; Trichoplax found by, 96 

 Scirtopoda, 200, 201, 203, 206, 207, 223 

 Sclerocheilus, 334 

 Sclerostomum, 163 

 Scoleciformia, 258, 305, 831 f. ; vascular 



system, 252 ; buccal region, 269 ; food 



of, 296 

 Scolecolepis, 299, 322 

 Scolex, 5, 74, 75 f., 89 ; S. polymorphus, 



77 ; of Taenia solium, 79. 

 Scolithus, 302 

 Scoloplos, 299, 321 ; parapodium, 265 ; 



habitat, 286 

 Scruparia, 527 

 Scrupocellaria, 517, 518, 519, 526 ; vibra- 



cula, 477, 485, 517 ; phosphorescence, 



478 : larva, 511 



