386 



INDEX 



Septal fossula, 78 



necks, 262, 266 

 Serpula, 159 

 Sertularia, 55, 56, 63 

 Sessile eyes, 325, 326 

 Sicula, 57, 60, 61 

 Shrimps, 329 

 Side-plates, 152 

 Silica, 3, 7, 28, 34, 35 

 Silver-fish, 334 

 Simple ambulacra, 120 

 Sinistral gasteropods, 234 

 Sinupalliata, 210 

 Siphon, 199, 232 

 Siplwnia, 43 

 Siphonida, 210 

 Siphonostomatous, 235, 253 

 Siphonotreta, 172 

 Siphonozooids, 96 

 Siphuncle, 262, 266, 283 

 Skeletal-spicules, 35 

 Slimonia, 349 

 Smithia, 88 

 Solarium, 242 

 Solaster, 107, 112 

 Solen, 225 

 Solitary corals, 102 

 Spatangus, 118, 135 

 Species, 13 

 Sphcerexochus, 308 

 Spharophthalmus, 305 

 Sphcerospongia, 47 

 Spliceridites, 231 

 Spicules, 34-37, 94, 95 

 Spiders, 354 



Spines (Echinoidea), 122 

 Spiracles, 151, 154 

 Spiral angle, 233 



„ ornament, 237 

 Spire of gasteropods, 233 

 Spirifer, 179 

 Spiriferina, 179 

 Spiroloculina, 22 

 Spiropora, 195 

 Spirorbis, 159 

 Spirula, 280, 284 

 Spirulirostra, 283, 286 

 Spondyhis, 215 

 Sponges, 31-49 

 Spongilla, 41, 46, 48 

 Spongin, 34, 40, 41, 45 

 Sporozoa, 16 



Squid, 257 

 Squilla, 327 

 Stalked eyes, 327 

 Starfishes, 107 

 Staiirocephalus , 308 

 Stauronema, 48 

 Steganoblastus, 157 

 Stem (Blastoidea), 149 



„ (Crinoidea), 136, 137 



„ (Cystidea), 146 

 Stenotheca, 254 

 Stephanoceras, 276 

 Stepheoceras, 276 

 Sternum, 290, 346, 352 

 Stigmata, 352 

 Stomatopoda, 327 

 Stomatopora, 192 

 Stomechinus, 127 

 Stornodaeum, 75, 76, 94 

 Stone-canal, 110, 135 

 Strabops, 350 

 Straparollina, 254 

 Streptelasma, 91 

 Streptoneura, 233, 238 

 Strickland ia, 178 

 Stringoceplialus, 184 

 Stromatocystis, 157 

 Stromatopora, 71 

 Stromatoporella, 73 

 Stromatoporoidea, 71 

 Strombus, 244 

 Strophalosia, 175 

 Strophomena, 176 

 Strophonella, 176 

 Sty laster, 71 

 Styliform columella, 78 

 Stijlina, 92 

 Shjliola, 250 

 Stylomtrus, 349 

 Sub-anal fasciole, 123 

 Sub-petaloid ambulacra, 120 

 Sucking-discs, 257, 279, 281, 283 

 Superior lateral lobe, 267 

 Supplemental skeleton, 19, 25 

 Sur-anal plate, 118 

 Suture (Cephalopoda), 262, 267 



,, (Gasteropoda), 233 

 Sycum, 255 

 Synapta, 135 

 Synapticula, 79 

 Syncarida, 323 

 Syncyclonema, 215 



