INDEX 



279 



Sarcolemma, 66 



Sarcoplasm, 66 



Sarcoptes, 234 



Sarcosporidia, 49, 57 



Sarsia, 91 



Scallops, 186, 188 



Scaphopoda, 192, 201 



Schistosoma, 116, 126 



Schistosomes, 112 



Schizocerca, 143 



Schizogony, 9, 26 



Schizonts, 26 



Schizopoda, 207, 223 



Sclerites, 203, 230, 239 



Scleroblasts, 85 



Scolex, 116, 122 



Scolopendra, 233 



Scolopendrella, 232, 234 



Scorpionida, 227, 234 



Scorpions, 225, 226, 227 



Scuds, 216 



Scutigera, 233, 234 

 Scyphopolyp, 95 

 Scyphistoma, 95 

 Scyphozoa, 94, 102 

 Sea anemones, 97, 99 

 Sea cucumbers, 165, 177 

 Sea fans, 100 

 Sea hares, 196 

 Sea Hlies, 165, 179 

 Sea mouse, 151 

 Sea pansies, 97, 100 

 Sea pens, 97, 100 

 Sea urchins, 165, 175 

 Sedentaria, 152, 157 

 Seison, 143 

 Seisonida, 143 

 Selective apparatus, 136 

 Self fertihzation, 18 

 Seminial receptacle, 18 

 Semostomae, 103 

 Semper, 260 

 Sepia, 198, 200, 201 

 Septa, 96 

 Septibranchia, 201 

 Serosa, 247 



Serpent stars, 165, 174 

 Sertularia, 102 



Setae, 147, 152 

 provisional, 150 



Sex-chromosomes, 13 



Sexual reproduction, 8 



Sheep-liver fluke, 115 



Shell of Brachiopoda, 161 

 of Mollusca, 184, 187 



Shell gland, 114, 184, 206, 217 



Shipworms, 186 



Shrimps, 216, 218 



Sida, 222 



von Siebold, 22 



Silenia, 201 



Sinuses, 155, 203 



Siphogenerina, 57 



Siphon, 176, 177, 186, 187, 192, 197 



Siphon of Echinoidea, 176 



Siphonaptera, 251 



Siphonoglyphes, 98, 99 



Siphonophora, 93 



Sipunculus, 157, 158 



Sleeping sickness, 37 



SUme moulds, 41, 42 



Slugs, 192, 197 



Snails, 192 



Solaster, 174, 182 



Solenomya, 201 

 Solpugida, 229, 234 

 Somatic cells, 11, 21 

 Sow bugs, 205, 216, 222 

 Spadella, 147, 157 

 Spadix, 92 

 Sparganum, 126 

 Spatangoidea, 177, 182 

 Spatangus, 177, 182 

 Spermatogenesis, 11 

 Spermatophores, 18, 155, 199 

 Spermatozoa, 10 

 Sphaeridia, 177 

 Sphaerium, 201 

 Sphaerocapsa, 57 

 Sphaerophyra, 58 

 Sphyranura, 125 

 Spiders, 225, 226, 227 

 Spinnerets, 228 

 Spinning organs, 228 

 Spinning tubes, 228 

 Spinulosa, 182 

 Spiracle, 232, 244 



