INDEX. 533 
Sibbaldii, Harmothoé, I 1 327. 
Siberti, Staurocephalus, IT 1 365. 
siciliensis, Hunice, IT 1 344, 349. 
sicula, Hesione, II 1 1383. 
— Hyalinecia, IT ii 417, 418. 
— Onuphis, II ii 418, 420. 
sifoncello, Polia, I i 19. 
Sigalion, I ii 242, 406, 427; IT ii 280. 
Sigalionide, I 11 406; IV u 427. 
Sigambra, IT 1 351. 
Sige, II i 43. 
signata, Heteronereis, II 11 292, 295. 
similis, Apomatus, IV 11 338, 376, 379. 
—  Capitella, III i 281. 
—  Microphthalmus, [IV 1 445. 
simillima, Syllis, II i 167, 168. 
simplex, Diopatra, IT 1 409. 
—  Psygmobrauchus, IV u 334. 
—  Rhynchoscolex, I i 28. 
simplices, Terebellze, IV i 95. 
sinistrorsa, Serpula, IV 11 392. 
— Spirorbis, [V 1 392. 
Siphonenteron, I i 28. 
siphonostoma, Glycera, IT 1i 473 f, 482, 487, 493. 
= Lumbricus, IT ui 483. 
= Rhynchobolus, IT 11 483, 493. 
Siphonostomez, ITT 1 82. 
siphunculus, Planaria, I i 15. 
= Polba, IL nm Neh Is, By 
Sipunculide, I i 29. 
Sipunculus, I i 2, 14; IIT i 200, 257. 
sipunculus, Polia, I ic 99. 
Skene, I i 4. 
skifera, Mitraria, IIT i 355. 
Smitti, Hreutho, IV i 97, 190. 
—  lLeucariste, [IV i 190. 
sociabilis, Staurocephalus, II i 357. 
socialis, Diopatra, II 1 407, 414. 
—-  Nemertes, I i 4. 
—  Phyllochetopterus, IV 1 476. 
—  Vermilia, IV u 364. 
Sée-Skollorm, IT i 269. 
Solen, ITV i 38; IV i 360. 
solitaria, Serpula, LV ii 352. 
Solowetia, [TV i 103. 
somatotomus, Meckelia, I i 15, 16, 31. 
sombreriana, Onuphis, II ii 404. 
sordida, Ascidia, IV 1 56. 
sordidum, Chlorema, III i 108. 
Sosane, IV i 63. 
Spallanzani, Amphitrite, IV ii 262. 
= Sabella, [IV 11 268. 
a Spirographis, IV i 101, 221; IV ii 261, 
309, 310. 
Spatangus, I ii 338, 380; III i 92, 362; 
IV i 295, 337. 
spatulata, Clymene, IV ii 496. 
spatulatus, Petaloproctus, IIT 1 295. 
speciosa, Manayunkia, [V i 222; IV ii 307. 
IV i 74; 
spectabilis, Amblyosyllis, IT i 225. 
— Amphiporus, I i 4, 6, 44, 64, 80, 827, 89, 
92; I ic 134, 152, 160. 
— Cerebratulus, I i 38; I ic 161. 
= Gattiola, IL i 225. 
— Nauphanta, IV ii 441. 
— Nemertes, I ic 161. 
— Neottis, IV i 178. 
— Ommatoplea, I ic 161. 
— Pterosyllis, II 1 224. 
— Thelepus, IV i 180, 181. 
spetsbergensis, Eteone, II i 98, 99, 104, 105; IV i 
430, 431. 
Spheerodoride, II 11 495; III i 45; IV ui 470. 
Spherodorum, II i 159; III i 46, 239; IV 1 487. 
Spherosyllis, II 1 156; IL i 235, 241; IV u 449 
450. 
spinifer, Gordius, I ic 198. 
spinifera, Harmothoé, I 11 327, 330, 333, 341. 
= Polynoé, I 11 327, 386, 357. 
Spinosphera, IV i 104. 
Spinther, I ii 221, 227. 
spinulosa, Polynoé, I 11 296. 
— Sabellaria, I 1 438; IV i 1 f, 12, 22, 24f. 
-— var. ensifera, Sabellaria, 1V i 15. 
— var. Intoshi, Sabellaria, [V i 16, 22. 
Spio, IT i 52, 195; IT u 252; IIL i 47, 136, 168, 
195; IV 1 474. 
Spiochetopterus, III i 118, 182; IV u 474. 
Spiodea, III i 138. 
Spione, IIT i 133. 
Spionide, I 1 429; III i 1383; IV ii 477. 
Spiophanes, IIT i 134, 180. 
spiralis, Grymea, IV i 181. 
spiralis, Lineus, I ic 210. 
Spirillum, [V 1 384. 
spirillum, Circeis, [IV ui 394. 
— Serpula, [IV ii 391, 410. 
a Spirorbis, [IV 11 321, 385, 386, 390, 391, 
399, 407, 415. 
Spirobranchus, IV ii 324. 
Spirographis, IV i 217; IV ui 261, 301. 
spirographis, Serpula, [IV i 352. 
Spiromella, IV ii 331. 
Spirorbis, III i 201; IV ii 821, 323, 345n, 384. 
spirorbis, Serpula, IV ii 391, 409, 410, 416. 
— Spirillum, IV i 392. 
— Spirorbis, [V ii 385, 386, 419. 
var. reversa, Serpula, IV ui 410. 
splendens, Phyllodoce, II 1 82, 83, 85, 86. 
— (Carobia), IT i 83. 
satanitaa, Borlasia, I i 38, 80, 81, 88, 86; Lic 103, 
161. 
o Lumbriconereis, II 1 400. 
= Ptychodes, I ic 161. 
— Valencinia, I ic 206. 
spongicola, Haplosyllis, IT i 197. 
oo Syllis, IT 1 173, 196,197; IV ui 427. 
— var. tentaculata, Syllis, IT 1 199. 
