732 



INDEX 



serpentina (Pristina), 309. 



Serpulidac, 302. 



sorrata (IVuia), 201. 



serratus (Polydesnuis), 471. 



scrratiis (Polydosnius), 472. 



Serripes, 593. 



Serrula, 409. 



serrulatus (Cyclops), 347. 



serrulatus 



(Simocephalus), 335. 

 Sertularella, 106. 

 Sertularia, 106. 

 sertularia (Dinobryon), 35. 

 Sertulariidae, 105. 

 setacaudatus 



(Tortanus), 345. 

 Setae, 277. 



setifera (Latona), 334. 

 setiferus (Peneus), 388. 

 setigera (Uronychia), 64. 

 setigerura (Loxophyllum), 



53. 

 setosa (Ampharete), 296. 

 setosa (Spio), 293. 

 sctosum {Diadcma) , 643. 

 sexpunctatus (Dolomedes), 



432. 

 sexspinosa 



(Scolopoeryptops), 476. 

 Sheep's wool sponge, 85. 

 Ship worms, 598. 

 Shrimps, 386. 

 sicula (Appendicularia), 



658. 

 Sida, 333. 

 Siderastrea, 149. 

 siderea (Siderastrea), 149. 

 Sididae, 333. 

 Sigaretus, 538. 

 sigismundl (Echiniscus), 



458. 

 sigmoides (Metopus), 58. 

 Sigmurethra, 514. 

 signatuH (Cyclops), 347. 

 sigsbei (Phormosoma), 642. 

 Siliqua, 595. 



siliqua (Cyrtodaria), 597. 

 similis (Oithona), 347. 

 similoplexus 



(Pneumonoeces), 186. 

 Simocephalus, 335. 

 simplex (Anomia), 570. 

 simplex (Mastigamoeba), 



27. 

 simplex (Nuclearia), 22. 

 simplex (Rhyncholophus), 



454. 

 simplex (Rhynchoscolfcx), 



161. 

 simplissima (Planaria), 



166. 

 gincera (Valvata), 545. 



Single-celled Animals, 11. 

 siniiosa (Meandrina), 149. 

 Siphon, in cephalopods, 



602 ; in gastropods, 492, 



529 ; in pelecypods, 563 ; 



in tuuicates, 663. 

 Siphonal canal, 529. 

 Siphonodentaliidae, 491. 

 Siphonodentalium, 492. 

 Siphonoglyph, 132. 

 Siphonophora, 121. 

 Siphonosoma, 274. 

 Siphonozooids, 137. 

 Siphuncle, 605. 

 Sipunculida, 273. 

 Sipunculoidea, 272. 

 sipunculoides 



(Edwardsiella),140. 

 Sipunculus, 274. 

 siro (Tyroglyphus), 442. 

 Six-hoolied embryo, 190. 

 Skenea, 543. 

 SIceneidae, 543. 

 Sleeping sickness, 30. 

 Slime sponges, 86. 

 Slipper-animalcules, 56. 

 Slugs, 526, 527, 528. 

 Sluiteri (Proneomenia), 



484. 

 Small spider crab, 396. 

 Smittina, 258. 

 Snails, 492. 

 Snout mites, 453. 

 socialis (Enchytrspus). 307. 

 socialis (Lacinularia), 234. 

 .socialis (Lineus), 208. 

 sociatus (Zoanthus), 141. 

 Soft-shell clam, 594. 

 sol (Actinophrys), 22. 

 Solaster, 630. 

 Solasteridae, 630. 

 Solemya, 569. 

 Solemyidae, 569. 

 Solenidae, 595. 

 Solenogastres, 483. 

 Holcnomya, 569. 

 Solifugae, 408. 

 .solitaria (Haminea), 497. 

 solitaria (Pyramidula), 



522. 

 solium (Taenia), 201. 

 solidissima (Mactra), 589. 

 Solpugida, 408. 

 Solpugidae, 408, 

 solstitialis 



(Trochosph»ra), 236. 

 Somatogyrus, 542. 

 sordida (Proales), 238. 

 Sow-bugs, 378. 

 sowerbi ( Craspedacusta ) , 



119. 

 spadicea (Cypraea), 550. 



Sparganophilus, 312. 

 Spatangidae, 645. 

 Spatangoida, 645. 

 speciosa (Manayunkia), 



301. 

 spectabilis (Tubularia), 



103. 

 Sperm sac (in Oligoch.neta), 



303. 

 Spermatheca,in Oligochaeta, 



303; in gastropods, 519. 

 sphaericus (Paratlgastes), 



348. 

 Sphaeridia, 639. 

 Sphaerium, 586. 

 Sphaeroma, 375. 

 Sphaeromidae, 375. 

 Sphaerophrya, 67. 

 .sphaerula (Theridula), 421. 

 Sphaerularia, 217. 

 sphericus (Chydorus), 337. 

 Sphyranura, 176, 

 Spicules of sponges, 73. 

 Spider crabs, 395. 

 Spider webs, 415. 

 Spiders, 413. 

 Spindle muscle, 273. 

 spinea (Acrosoma), 426. 

 Spinnerets, 414. 

 spinosa (Childia), 159. 

 .spinosus (Eurypauropus), 



467. 

 Spintharus, 421. 

 Spinulosa, 628. 

 spinulosa (Piona),451. 

 spinulosus (Echinaster), 



630. 

 Spiny lobsters, 392. 

 Spiny rock shell, 555. 

 Spio, 293. 

 Spionidae, 292. 

 Spioniformia, 292. 

 Spiracle, 403. 

 Spiral staircases, 535. 

 spiralis (Cirripathes), 139. 

 spiralis (Trichinella), 221. 

 Spire (in snail shells), 506. 

 Spirobolus, 470. 

 Spirocheta, 26. 

 Spirochetida, 26. 

 Spirochetidae, 26. 

 Spirorbis, 302. 

 spirorbis (Spirorbis), 302. 

 Spirostomum, 58. 

 Spirula, 607. 

 Spirulidae, 607. 

 Spisula, 589. 

 spitzbergensis 



(Terebratella),269. 

 Spondylomorum, 36. 

 spongeliformis 



(Cacospongia), 85. 



