INDEX. 



Slipper limpet, 345 

 Slugs, 317 

 Snails, oil 

 Snail, apple, 3i4 



„ cellar, ol2 



,, garden, 313 



„ land, 311 



,, pear, 332 



,, lioman, 313 



„ pond, 2i0, oOr 

 Solaridaj, 325 

 Solaster, 159 

 Solemyia, 283 

 Solen, 2S2 

 Soleiiida>, 282 

 Solenopliorus, 202 

 Spadella, 2U 

 Spatant;ida3, 173 

 Spatangiiia?, 174 

 Spatangocystis, 174 

 Spatangus, 174 

 Specialized types, xvii 

 Spectre candles, 373 

 Spicules, sponge, 54 

 Spermatopliores, 366 

 Sperniatozoan, ix 

 Spha-ridia, 102 

 Splia'riuni, 275 

 Splutrodina, 20 

 Spluurcijihrya, 47 

 SpliaTdzoum, 12 

 Spicula amoris, 305 

 Spicules, r>4 

 Spindle, xlv 

 Spiril'eridjp, 247 

 Spinalis, 35S 

 Spirillina, 18 

 Spirochonia, 45 

 Spirorbis, 227 

 Spirostonium, 27, 41 

 Spirilla, o73 

 Spiral ida', 373 

 Spondylus, 262 

 Sponges, 44 

 Sponge, bath, 51, 64 



,, commercial, G4 



„ crumb-of-bread, 06 



,, cup, 04 



,, dead-man's finger, 05 



,, hard-head, 64 



,, fresh-water, 67 



,, glass, 60 



,, horse, G4 



,, spicules, 54 



,, toilet, 64 



,, wool, 64 



,, Ziramocca, 64 

 Spongina;, 64 

 Spongomonas, 36 

 Squid, 3liO, 374, 376 

 Squid, giant, 377 

 " Staggers," 201 

 Star-iishes, 152 

 Statoblasts, (i7, 238 

 Stauroteuthis, 369 

 St. Cuthbert's beads, 139 

 Stellerida, 147 

 Stentor, 28 

 Stephanomia, 102 

 Stephanops, 205 

 Sternapsis, 227 

 Stichopus, 182 

 Stichotricha, 4S 

 Stinging cells, 74 

 Stoastoma, 324 

 Stomatoca, 8.3 

 Strepoinatina', 342 

 Streptaxis, 310 

 Streptonenra, 294 319 

 Strigilla, 279 



Strobila, 06 

 Strombida;, 349 

 Strombs, 350 

 Strombus, 350 

 StrongylidiB, 211 

 Strongylocentrotus, 170 

 Stylets, 29 

 Stylifer, 342 

 Styliola, 358 

 Stylommatophora, 309 

 Stylonichia, 45 

 Suberites, 66 

 Succinea, 317 

 Sucoinida;, 317 

 Suckauliock, 277 

 Suctoria, 47 

 Sun-animalcules, 13 

 Sun-dial shell, 326 

 Sun-iish, 8!l 

 Sun-star, 160 

 Supply system, 53 

 Surf-clam, 278 

 Sutures, 287 

 Sycaiulra, 55 

 Sycones, ()2 

 Sycotypus, 131 

 SyllidiB, 229 

 Synapta, 180 

 Synaptidte, 180 

 Synaptula, 180 

 Syngamus, 211 

 Synthetic type, xviii 



Syzygy, i44 



Tactile sense, xxx 

 Tainia, 1S8 

 Tasnioglossa, 338 

 Taonius, 375 

 Tapes, 277 

 Tape-worms, 198 

 Tebenophorin^, 318 

 Tebcuophorus, .318 

 Tectibranchiata, 301 

 Teeth, xxi 

 Tele.scopium, 348 

 Telliiia, 279 

 Tellinida', 279 

 Tentaculata, HI 

 Tentaculifera, 47 

 Terebella, 225 

 Terebellum, 350 

 Terebra, 337 

 Terebratulidje, 247 

 Terebratulina, 247 

 Teredinas, 284 

 Teredo, 284 

 Tergipes, 298 

 TererbridiE, 337 

 Testacella, 310 

 Testacellida;, 310 

 Testicardina, 247 

 Tethva, 118 

 Tethvs, :m 

 Tetr.-ibranchiata, 367 

 Tetractinellinre, 68 

 Tetrastemma, 215 

 Teuthida;, 375 

 Textularia, l(i, 21 

 Thalassema, 2.31 

 Thalassicolla, 7 

 Thalassolampe, 9 

 Thamnocnidia, 81 

 Tliecata, 87 

 Thecidium, 247 

 Thecosomata, 357 

 Thimble-fish, 93 

 Thorny-oyster, 262 

 Thracia, 2,82 

 Thunder-bolts, 373 

 Thiu'icola, 45 



Thyone, 181 

 Tliyonidium, 181 

 Thysanozoon, 189 

 Thysanoteuthis, 375 

 Tiedemannia, 350 

 Tintinus, 42 

 Tissues, ix, xiii 

 Tube-worm, 225 

 Toilette s))onge, 64 

 'i'omopteris, 230 

 Tongue, 28.S 

 Tooth shells, 291 

 Top-shells, 322 

 Tornatella, 302 

 Tornatellidaj, 301 

 Torquatella, 43 

 Toxiglossa, 336 

 Trachelocera, 36, 40 

 Trachelocerida;, 40 

 Trachelomonas, 37 

 Trachydermon, 394 

 Trachymedus.'e, 88 

 Trachynema, 88 

 Trematoda, 191 

 Trichaster, 152 

 Trichina, 210 

 Trichinosis, 210 

 Trichocephalus, 365 

 Trichocysts, 27, 40 

 Trichodina, 43 

 Trichonella, 63 

 Triclionympliidre, 41 

 TricbotracbelidiE, 210 

 Trichocephalus, 211 

 Tridacna, 272 

 TridacnidiE, 272 

 Triforis, 348 

 Trigonia, 269 

 Trigonidffi, 269 

 Triploblastic, xi 

 Tritia, 333 

 Tritonida;, 352 

 Tritonium, 353 

 Trivia, 349 

 Trochosphere, 251 

 Trochostoma, 179 

 Trochozoon, 186 

 Trochammina, 21 

 TrochidEe, 322 

 Trochus, 322 



Trnmpet animalcules, 42 

 Truncatella, 340 

 Trochoceras, 368 

 Trychonympha, 41 

 Trypanosoma, 31 

 Tr'vpauosomata, 31 

 Tuba, (iO 

 TubicolfE, 225 

 Tubitex, 223 

 Tubificida;.223 

 Tubipora. 121, 123 

 Tubiporid.T, 123 

 Tubularia, 81 

 Tubulipora, 240 

 Tubuliporidae, 240 

 Tulotoma, 340 

 Tun shells, 352 

 Turbellaria, 188 

 Turbo, 322 

 Turritellida;, 343 

 Turritopsis, 88 

 Tylenchus, 208 

 Tyrian purple, 330, 334 

 Types, xvii 



Umbellularia, 124 

 UmbellulidiE, 124 

 Umbilicus, 287 

 Umbrella, 303 

 Uucini, 29 



