INDEX 



531 



Schismope, 266, 407 



Schizochiton, 187, 402, 403 



Schizodus, 448 



Schizoglossa, 325, 440 



Schizoplax, 403 



Schizostoma, 4^3 



Schloenhacia, 398 



Scintilla, 175, 453 



Scissurella, 265, 407 ; radula, 226 



Sclerochiton, 403 



Scrohicularia, 15, 164, 453 \ siphons, 

 164 



Sculptaria, 333 



Scurria, 405 



Scutalus, 356, 442 



Scutellastra, 405 



Sciitus, 245, 406, 4O6 



Scyllaea, 433 ; jaws, 212 ; stomach, 239 



Segmentina, 320 



Selenites, 339, 341, 440 



Selenitidae, radula, 231 



Selenochlamys, 296 



Self -fertilisation, 42-44 



Semele, 453 



Semicassis, 4^0 



Semper, K. , on habits of Limnaea, 34 ; 

 of Helicarton, 45, 67 ; on mimicry, 

 67 ; on parasitic Eulima, 79 ; on de- 

 velopment of Limnaea, 84, 94 ; on 

 sexual maturity in snails, 129 ; on 

 Onchidium, 187 



Sepia, 381, 385-387, 389; egg-capsules, 

 127 ; glands, 136 ; jaws, 214 ; radula, 

 236 ; alimentary canal, 238 ; ink-sac, 

 241 ; hectocotylus, 389 



Sepiadarium, 389 



Sepiella, 389 



Sepiola, 389 ; glands, 136 ; radula, 236 



Sepioloidea, 389 



Sepiophora, 388 



Sepioteuthis, 390 ; hectocotylus, 139 



Septana, 337, 338, 410 



Septibranchiata, 145, 167, 459 ; bran- 

 chiae, 166 



Septifer, 274, 449 



Sequenzia, 4^0 



Sergius Grata, 104 



SerrifusuSj 424 



Sesara, 305, 440 



Sex, differences of, 133 



Shell, 244 f. ; internal, 174 ; shape of 

 bivalve, 445 



Shell-gland, primitive, 132 



Shells as money, 96 f. ; as ornament, 

 etc., 98 f. ; various uses of, 98 f. ; 

 prices given for rare, 121 ; sinistral, 

 249 



Shores of N. Asia, no littoral fauna, 2 



Showers of shells, 47 



Sigaretus, 186, 245, 267, 4II ; foot, 198 



Sight, 180 



Silenia, 459 ; branchiae, 163. * 



Silia, 425 



Siliqua, 274, 457 



Siliquaria, 248, 4^^ 



Simnia, 419 



Simpulopsis, 345, 350, 442 



Simpulum, 4^0 



Simroth, on recent forms of Helix, 22 ; 

 on food of slugs, 31 ; on crawling of 

 Helix, 45 



Singular habitat, 48 



Sinistral shells, 249 



Sinistralia, 424 



Sinusigera, 133 



Sipho, 424 



Siphonalia, 424 



Siphonaria, 18, 431 ; classification, 19 ; 

 breathing organs, 151, 152 



Siphonarioidea, 431 



Siphonodentalium, 444 



Siphonostomata, 156 



Siphonotreta, 493, 496, 504; strati- 

 graphical distribution, 507, 508 



Siphons, 173 ; in burrowing genera, 

 165 ; i)ranchial, 155 



Sistrum, 75, 423 ; radula of S. spec- 

 trum, 79, 222 



Sitala, 301, 304, 310, 314-319, 333, 440 



Skargard, Mollusca of the, 13 



Skenea, 415 



Skenidium, 505, 508 



Slit, in Gasteropoda, 265, 406 



Slugs, habits and food of, 30 f . ; bite 

 hand of captor, 33 ; in bee-hives, 36 ; 

 in greenhouses, 36 ; protective col- 

 oration, 70 ; eaten in England, 120 



Smaragdia, 21 



Smaragdinella, 430 



Smell, sense of, 192 



Smith, W. Anderson, quoted, 98, 111, 

 114, 191 



Snails as barometers, 50 ; plants fer- 

 tilised by, 102 ; cultivation for food, 

 118 f. ; used for cream, 119 ; as medi- 

 cine, 120 ; banned by the Church, 121 



Solariella, 4O8 ; radula, 225 



Solarium, 264, 412, 413 ; radula, 224 



Solaropsis, 343, 353-357, 442 



Solecurtus, 165, ^57 



Solen, 171, 446, 457; vision, 190; 

 habits, 45 



Solenaia, 452 



Solenomya, 275, 448 



Solenotellina, 456 



Solomon islanders, use of shells, 9S 



Somatogyrus, 415 



Sophina, 305 



Spallanzani, experiments on Helix, 163 



Spat, fall of, 113 



Spatha, 294, 331, 336, 452 



Spekia, 333 



Spermatophore, in Cephalopoda, 137 ; 

 in Helix, 142 



