70 



INDEX 



ductive organs. 723 : Systematic posi- 

 tion, 737 



S< jiin <>!/< i-'(f>(, 708 



Septal funnel, 101* 



Septal neck, 725* 



Septibranchia, 647*, 048, 054 



Septum, 192* 



Senofoa,~32Q 



Serosa, 581* 



/'t, 434, 437, 447 

 uJ.n ' , 433 



Sertulariana, 133 



Seta, 405*, 419, 431 



Seta, provisional, 416 



Sctigerous sac, 405*, 420, 431 



Sexual dimorphism, 38* 



Sexual generation, 130 



Shell, Magellania, 331,332 : Brachiopoda, 

 338, 339 : J/uW, 633 : Pelecypoda, 

 048 : Chiton, 004, 665 : Triton, 672, 

 673 : Gastropoda, 080 : Scaphopoda, 

 7o~>: Sepia, 111: Nautilu*, 725, 726: 

 Cephalopoda, 740 



Shell-gland, 492*, 493, 550, 043* 



Shelly loop, 332 



Ship-worm, 047 



Shrimp. 523 -^Z> 



Sicula, 155" 



.SY<//v; .'/<*, 688 



Silicispongiae, 103* 



Sinupalliata, 647*, 662 



Siphonodentalium, 705 



Siphonophora, 132*, 147, 148, 150, 152, 

 153, 154, 213 



Siphonozooid, 189* 



Siphons, inhalant and exhalant, 632*, 



, 649 



Siphuncle, 725* 



SipunculidcBf 455 



SIPUNCULUS XUDUS, General external 

 features, 451, 452 : Body-wall, 451 : 

 Gelome, 452 : Blood-vascular system, 

 452 : Alimentary canal, 452, 453 : 

 Nervous system, 453 : Nephridia and 

 gonads, 454 : Systematic position, 455 



Skeleton, 29* : Lobosa, 47: Fdraminifera, 

 51 : Heliozoa, 56 : Radiolaria, 58 : 

 Mastigophora, 68 : Ciliata, 87 : Actino- 

 zoa, 189 : Sepia, 712 : Cephalopoda, 

 743 See also Shell and Body-wall 



Skin, 29* See Body-wall 



Slugs, 684 



Snails, 684 



Solarium, 685 



So/o-tli-'tl* */ri:l/.//'tfHH, 651 



Solen, 661 

 Solenomya, 040 

 Solpugida, 012*, 614 

 SomatoMast, 414 

 Somatppleure, 582* 

 Spadella, 2<)3 

 ix, 728* 



Spatangoidea, 379*. 383, 389, 390 



Species, 1*, lo4' : 



Specific .name, 2* 



Sperm, 18, 28* 



Spermary, 37* 



Spermatozoon See Sperm 



Spermiduct, .">S 



Sphteridium, 303*, 383 



Sphcerophrya, 91 



Spicules, 30* 



Spiders, 612 



Spinning-glands, 592 



Spirifera, 339 



Spirolociilina, 53 



Spirorbis, 448 



Spirorbix l j t"i*, 444 



Spirula, 740, 741 



Splanchnopleure, 582* 



Sponyelia, 111 



SpoiKjilla, 109 



Spowjillidw, 112, 115 



Spongin, 111* 



Spongin-blasts, 112* 



Sporangium (Mycetozoa), 62 



Spore, 38* 



Spore formation, 62, 75, 89 



Sporocyst, 231, 258 



Sporosac, 140* 



Sporozoa, 44, 75, 70* 



Squammulina, 51, 52 



Squids, 736 



Squilla, 542 



STARFISH, External characters, 346, 347, 

 357 : Transverse action of arm, 349 : 

 Vascular and nervous systems, 3^50 : 

 Structure of disc, 351 : Body- wall and 

 ccelome, 351 : Digestive system, 353 : 

 Ambulacral system, 350, 354 : Ovoid 

 gland, 354 : Reproductive system, 356 : 

 Development, 358, 359, 360, 361 : 

 Systematic position, 380 



Starfishes, 346 See Asteroidea 



Stauromedusae, 164*, 165, 213 



Stentor, 83, 85 



Sfc.phfinorerox, 303, 305, 306 



St(;i'napi*, 432, 430, 440 



Sf'.rii'iKpi* x/nn-osa, 433 



Sternum, 498* 



Stewart's organs, 393* 



Stick-insects, 584 



Stigma (Euglena), 04 



Stigmata, 502, 575, 593 



Stinging capsule See Nematocyst 



Stolon, 183* 



Stomach See Digestive system 



Stomatogastric nerves, 422 



Stomatopoda, *24*, 542 



Stomidium, 188* 



Stomodceum, 161* 



Stone-canal, 354* 



Stony corals, 118, 182 



Strepsiptera, 002 



