776 



INDEX 



ductive organs, 7-3 : Systematic posi- 

 tion, 737 



Sfpt'n ,'i,h riita, 708 



Septal funnel, 161* 



Septal neck, 725* 



Septibranchia, (547*, 648, 654 



(Septum, 192" 



tii./'i'daria, 320 



Serosa, 581* 



Serpu/a, 434, 437, 447 



N, rpulidce, 433 



Sertularians, 133 



Seta, 405% 419, 431 



Seta, provisional, 416 



Setigerous sac, 40.5*, 420, 431 



Sexual dimorphism, 38* 



Sexual generation, 130 



Shell, Magellania, 331,332 : Brachiopoda, 

 338, 339 : J/H.S.SC/, 633 : Pelecypoda, 

 648: Chiton, 664, 665: Triton, 672, 

 673 : Gastropoda, 686 : Scaphopoda, 

 705: Stj>ia, 711: Nautilus, 72.5, 726: 

 Cephalopoda, 740 



Shell-gland, 492-% 493, .5.50, 643* 



Shelly loop, 332 



Ship-worm, 647 



Shrimp, .523 



Sicula, 155" 



Siyaretitx, 688 



Silicispongiae, 103* 



Shmpalliata, 647*, 662 



Siphonodentalium, 705 



Siphonophora, 132", 147, 148, 150, 152, 

 153, 154, 213 



Siphonozooid, 189* 



Siphons, inhalant and exhalant, 632*, 

 649 



Siphuncle, 72.5" 



SipunculidcK, 4.5.5 



SIPUNCULUS XUDUS, General external 

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

 CYelome, 452 : Blood-vascular system, 

 452 : Alimentary canal, 452, 453 : 

 Nervous system, 453 : Nephridia and 

 gonads, 454 : Systematic position, 455 



Skeleton, 29* : Lobosa, 47: Foraminifera, 

 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 



JSolecurtits strigillatus, 651 



Sohn, 661 



SottHOtnya, 646 



Solpugida, 612*, 614 



SomaLoblast, 414 



Somatopleure, 582* 



Spadella, 293 



Spadix, 728" 



Spatangoidea, 379", 3S3, 389, 390 



Sp^ies, 1*, 104* 



Specific name, 2* 



Sperm, 18, 28* 



Spermary, 37* 



Spermatozoon See Sperm 



Spermiduct, 3s* 



Sphseriditim, 363*, 383 



Xphu i-ophi-i/H, 91 



Spicules, 30* 



Spiders, 612 



Spinning-glands, 592 



Sj>i,-ifei'(i, 339 



Spiroloculina, 53 



X/iiroi'liix, 448 



^/jii'fii-liifj In fix, 444 



Spirula, 740, 741 



Splanchnopleure, 582* 



S[,<,ll<J<-J'M, 111 



Spongillcc, 109 



Spongillidce, 112, 115 



Spongin, 111* 



Spongin-blasts, 1 12* 



Sporangium (Mycetozoa), 62 



Spore, 38* 



Spore formation, 62, 75, 89 



Sporocyst, 231, 258 



Sporosac, 140* 



Sporozoa, 44, 75, 76* 



Sqita/iimtiliita, 51, 52 



Squids, 736 



S,jni/fft, 542 



STAKFISH, External characters, 346, 347, 

 357 : Transverse action of arm, 349 : 

 Vascular and nervous systems, 350 : 

 Structure of disc, 351 : Body-wall and 

 ctelome, 351 : Digestive system, 353 : 

 Ambulacra! 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 



Sttittor, 83, 85 



Stephaiiocti-o*, 303, 305, 306 



,SV, ntaxpis, 432, 436, 440 



Xft-fitrtfijtin xpiitosa, 433 



Sternum, 498* 



Stewart's organs, 393* 



Stick-insects, 584 



Stigma (Eugleria), 64 



Stigmata, 562, .575, 593 



Stinging capsule See Nematocyst 



Stolon, 183* 



Stomach See Digestive sj-stem 



Stomatogastric nerves, 422 



Stomatopoda, 524*, 542 



Stomidium, 188* 



Stomodceum, 161* 



Stone-canal, 354* 



Stony corals, 118, 182 



Strepsiptera, 602 



