532 



MOLLUSCA — BRACHIOPODA 



Spermatozoa, forms of, 136 



Sphaerium, 453 



Sphenia., 456 



Sphenodiscus, 398 



Sphyradium, 442 



Spines, use of, 64 



Spiraculuni, 266, 4^4 



Spiraxis, 442 



Spirialis, 249 



Spirifera, 468, 501, 505 ; stratigraphical 

 distribution, 507, 508, 511, 512 



Spiriferidae, 501, 505^ 508 



Spiriferina, stratigrapliical distribu- 

 tion, 507, 508 



Spirobranchiata, 464 



Spirotroptis, 426; radula, 218, 219 



Spirilla, 247, 386, 3S7, 388 



Spirulirostra, 380, 386, 388 



Spondylium, 500 



Spondylus, 257, 446, 450, 430; ocelli, 

 191 ; genital orifice, 242 



Spongiobranchaea, 437 



Spongiochiton, 403 



Sportella, 453 



Starfish eat oysters, 110 



Stearns, R. E.G., on tenacity of life, 38 



Stegodera, 306 



Stenochisma, 505; stratigrapliical dis- 

 tribution, 507, 508 



Stenogyra, 324, 442 ; S. decollata, 279 ; 

 food, 34 ; smell, 194 ; Goodallii, 279 ; 

 octona, sudden appearance, 47 



Stenogyridae, radula, 234 



Stenopus, 440 ; habits, 45 



Stenothyra, 415 



Steiiotis, 4I6 



Stenotrema, 340, 441 



Stephanoceras, 399 



Stepsaiioda, 358 



Stilifer, 76, 77, 79, 422 



Stiliferina, 76, 422 



Stiliger, 432 



Stilina, 76 



Stoastoma, 348-351, 410 



StoloteiUhis, 389 



Stomach, 239 



Stomatella, 4O8 



Stomatia, 4O8 



Stomatodon, 302, 417 



Strehelia, 353, 440 



Strength of Helix, 45 



Strephohasis, 417 



Strepsidura, 424 



Streptanlus, 414 



Streptaxis, 302, 306, 309, 314-331, 343, 

 357-359, 440 ; variation, 87 



Streptoneura, 203, 404 



Streptosiphon, 424 



Streptostele, 329, 338, 440 



Streptostyla, 343-355, 353, 440 



Stricklandia, 505 ; stratigraphical dis- 

 tribution, 507, 508 



Strigatella, 425 



Stringocephalidae, 506, 508 



String ocephalus, 492, 497, 498, 500, 

 501, 506 ; stratigraphical distribu- 

 tion, 507, 508 



Strobila, 340, 345-353 



Strobilops, 442 



Strombidae, habits, 64 ; penis, 136 



Strombina, 423 



Strombus, 69, 200, 252, 4I8 ; mimick- 

 ing Conus, 69 ; operculum, 78, 269 ; 

 pearls from, 101 ; metapodium, 199 ; 

 stomach, 239 



Strophalosia, 504 ; stratigraphical dis- 

 tribution, 507, 508 



Stropheodonta, 497, 505, 508 



Strophia, 343-355, 442 ; S. nana, 278 



Strophochilus, 358, 441 



Strophomena, 499, 505 ; stratigraphical 

 distribution, 507, 508 



Strophomenidae, 500, 505, 508 



Strophostoma, 248, 414 



Structure of shell, 252 



Striithiolaria, 99, 4I8 ; radula, 216 



Styliola, 437 



Stylodonta, 339, 44I 



Stylommatophora, \\,\d>\,4S9; origin, 

 19 



Subemarginula, 4O6 



Submytilacea, 451 



Subularia, 422 



Subulina, 332, 352, 442 



SubuUtes, 420 



Siiccinea, 325, 327, 358, 433 ; jaw, 211 ; 

 S. putris, parasite of, 61 



Succineidae, 443 ; radula, 234 



Sudden appearance of MoUusca, 46 



Suessia, stratigraphical distribution, 

 507 



Sulphuric acid, 237 



Siircula, 426 



Sycotypus, 424 



Synaptocochlea, 4O8 



Syndosmya, 453 



Syringothyris, 500, 508 



Syrnola, 422 



Syrnolopis, 332, 333 



Systrophia, 356, 357 



T ACHE A, 441 



Taenioglossa, 223, 4II 



Taheitia, 414 



Talona, 4-57 



Tanalia, 304, 417 



Tancredia, 453 



Tang any icia, 332, 415 



Tanganyika, L., fauna of, 12 



Tanysiphoji, 454 



Taonius, 391, 391 



Tapes, 454. 



Taste, 179 



Tebennophorus, 143, 340, 440 



