616 



COMPARATIVE ANATOMY 



Rostellaria, 102 



„ rectirostris, 6 



Rostrifera, 6 



Rostrum (Cepb.), 68 ; (Gastr.), 102 

 Jioiula, 293 



Eotulse (Echinoid.), 400 

 Rudlstes {Hippurites), 62 

 Ruff (Gastr.), 107 



Sacculi (Criu.), diagram, 490 



Salenia, 290 ; apical system, 319 



Saleniidiv, 200 



Saxicava, 19 



.'^ccnor/iis, 243 



Sn,/,irli,/,r. a 



Scuplauukr, 46 



Scaphandridce, 10 



Scaphites stage, 68 



Scaphop)oda, 13 



Schizaster, 293 



„ canaliferus, pedicellariae, 397 



„ lacunosus, 294 



Schizohlastus, 315 

 Schizocardium, 562 



,, hrasiliense, gills, section, 



569 

 Scliizogony, 505 

 Schwammerdam's vesicle, 233 

 Scissurdla, 5 



Scofnphliirs, 418 



Scriihii-nhiriii jjiperata, 52 



SrriilnniliiriUhe, 51 



Scurria, 5 



Scuta buccalia, 360 



Scutella adoratia, 360 



Scutella, 293 



„ sex f oris, 292 



Scntellidve, 291 



Scutum (Parmorphus), 4 



Scyllceidoe, 13 



Scy taster, 326 



Sea urchins (= Echinoid.), 316 



Seyniproboscidifera, 6 



Semites (=fascioles), 349 



Semper's organ, 166 



Sepia, 224 ; alimentary canal, 189 ; body 

 cavity, 213 ; cephalic cartilage, 

 126 ; ctenidium, 85 ; diagram, 36 ; 

 gill, 96 ; gonad, male, 231 ; onto- 

 geny, 266, 267 ; nervous system, 

 148 ; renal sacs, 213 ; shell, sec- 

 tion, 69 ; spermatophore, 242 

 „ aculeala, shell, 70 

 „ officinalis, circulatory system, 209 ; 

 eye, 172 ; geuital organs, female, 

 240 ; genital organs, male, 239 ; 

 renal sacs, 224 

 ,, Sdrii/uiana, 83 



,Sr/,i,n/,n-;ii,i,, 24 



Srjiiii/c, .'.'/ ; nervous system, 148 

 ,Srj, in/, ,;,/,„, 54 



Srpint,iAl,is, 24 



Scptibmnchia, 21 ; gills, 92 



Sickles = radii (Echinoid.), 400 



Silenia Sarsii, 21 



Siliquia, 115 



Sinistral twist (Gastr.), 56, 60, 160 



SiwupjaUiata, shell, 63 



Siphon (Ceph.). 37 ; = accessory intestine 

 (Echinoid.), 481 ; (Gastr.), 43 ; (Lam.), 

 exhalent, 49 ; (Lam.), inhalent, 49 



Siphoniata, 44 



Siphonodentaliuin, 13 



Siphonoplax, 64 



Sliiliiiniistdinata, 44 



Siplmncle (Ceph.), 37 



Snlariila:, G 



Solastcridw, 29S 



Snlen, 19 



Soloiida; 19 



>Siili'nocnrtus, 19 



Sdlenogastres, 3 



SvJenogastridce, section, 212 



Siilcnomya, 91 



,Snl,„n,niil,l,r, 14 



»,l,'nn2„,d(i, 228 



Spadix, 116 



Spatagocystis, 295 



Siiiitnnglihr, 293 



,S/iii/iiiii/ifii/ii, 293 ; ambulacral brush, 

 section, 433 



Sjialiiini<ii(li-u, larva, 509 



SjjataitguiiKnpha, 293 



Spatangus, 293 



„ purpureus, apical system, 324 ; 



oral region, section, 441 



Spengel's organ, 84 



Spermatophore, 241, 242 



Spihwrechimis, 290 



„ granularis, pedicellarife, 397, 



398 



Spha;ridia (Echinoid.) 392 ; section, 392 



SpJuvrium, 17 



S2)haronis, 336 



Spiculum amoris, 237 



Spiracles (Blast.), 382 



Spirula, 24 ; shell, section, 69 

 „ prototypos, 23 



Spirulidce, 24 



Sjiiridirostra, 24 ', shell, section, 69 



Sjioiidi/lidce, 53 



Sj'n,l,fl/!l>s, 62 



Sp"iigin/,,-iiiicha:a, 11 



Spiiiigylucentrotus, 290 



Star-iish ( = Asteroidea), 316 



Stcganobranchia, 12 



Stcganocrimis, 307 



SfrJ idiocrinus, 307 



Sttlliishx. 206 



Slrll.riilni {= Asteroidea), 295 



S/niu,//,,ss,i, 6 



Stf,rns,,nuda, 290 



StcrnuHi, 348 



Stewart's organs (Echinoid.), 442 



Stichaster, 298 



„ albulus, 506 



