INDEX. 
oculifera, Potamilla, TV i 238. 
— Sabella, [IV 1 233. 
Oculina, IV i 288. 
Odontosyllis, II i 141, 178; II 1 238. 
cedificator, Ammochares, IIT 1 3857. 
ceedificatrix, Salmacina, [IV 1 340. 
cele, Lysidice, IT 1 349. 
(none, II ii 344, 350, 370. 
(nonites, IT 1 350. 
Crstedia, I i 25, 36. 
(rstedi, Aricia, IT 1 496. 
—  Clymene, III i 293, 339; IV u 495. 
— Euclymene, IIT i 339. 
—  Eunoa,I u 292/. 
—  Exogone, II i 149. 
= Heteronereis, IL uu 310. 
— Nephthys, IT 1 9, 16. 
—  Panthalis, I ii 400; IT ui 380. 
—  Pseudoclymene, IT 11 338, 
(Erstedii, Cephalothrix, I ic 209. 
— Cerebratula, I ic 191. 
= Cerebratulus, [ ic 105, 106, 109, 115. 
= Exogone, IT 1 224. 
— Meckelia, I ic 191. 
—_ Phyllodoce, IT i 91. 
cestroides, Ammotrypane, IIT i 15, 26. 
— Travisia, [II 1 26. 
officinalis, Corallina, I i116; I ic 207; IL 1 51, 69; 
IV ii 394, 395. 
Oithonia, IIT i 200. 
oleagina, Meckelia, I ic 186. 
oleaginus, Cerebratulus, I ic 186. 
Oligobranchus, IIT 1 34. 
oligocheeta, Syllis, IT i 197. 
Oligognathus, IT 11 350, 370. 
olivacea, Meckelia, I 1 32; I ic 186, 195. 
—  Nemertes, I 1 30; I ic 186. 
= — (Borlasia), I ic 186. 
olivaceus, Halacarus, I 1 414. 
Ollivantii, Nemertites, I i 18. 
Omatoplea, I ic 156. 
Ommatophora, I i 35. 
Ommatoplea, Ii 17,85; I ie 155. 
Omphalopoma, IV 11 323, 376. 
Omphalopomopsis, IV ii 325. 
onanaryensis, Hisigella, [II i 274. 
oniscoides, Spinther, I ii 228, 229, 230, 282. 
Oniscosoma, I 11 227. 
Onuphide, IT 1 403. 
Onuphis, IT ii 344, 404; IV ii 329. 
oohuensis, Greefia, [IV 1 441. 
Opalina, I ic 108; III i 8, 18, 258. 
opalina, Arabella, IT 1 400. 
—  lLeodice, II 1 443. 
— Nothria, IL 1 418. 
opercularis, Pecten, ITI i 48, 303; IV i 152. 
operculata, Sertularia, IT 11 244; IV ii 462, 
Ophelia, IT 11 252; III i 2, 9, 149, 242, 
opheliz, Butschliella, III 1 14. 
525 
Opheliide, I ii 429; IL ii 495; T1.il; IV u 
469. 
Ophelina, III i 7. 
Ophelracea, IIT i 1. 
Ophiocephalus, I i 16, 87; I ic 185. 
Ophiocoma, IIT i 50. 
Ophiodromus, IT i 114, 116; II 1 342. 
Ophioglypha, II ii 371. 
Ophiothrix, I 1 377. 
Ophiuricola, IT 11 371. 
Ophryodendron, IT 11 244; IV i 104, 105. 
Ophryotrocha, II ii 350, 364; IV i 20. 
Ophyocephalus, I i 15. 
Opisthodonta, IV ii 456. 
Ops, III i 356. 
Oria, IV i 217; IV ii 268, 301. 
Oridia, [IV ii 268. 
Orm, IIT i 59. 
ornata, Amphitrite, I 1 399; IV i 108. 
— HEulalia, IT i 56f; IV u 431. 
—  Procerea, II i 139. 
— Stephanosyllis, IT 1 225, 228. 
—  Terebella, IV i 107. 
— Valencinia, I i 28; I ic 204. 
ornatus, Autolytus, II i 146. 
— — (Procerea), II 1 186, 187. 
ornithocheta, Micromaldane, IV ii 497. 
Orseis, If i 115. 
Orthostoma, I i 17. 
oryx, Hippotragus, I i 386. 
Osawai, Ceratocephale, IT 11 260, 279. 
—  Ceratocephalus, II 11 319. 
Ostrea, II i 430. 
ostres, T'erebella, ITI 1 242, 255, 
ostrearia, Amphitrite, IV, i 23. 
— Hermella, IV i 18, 23. 
Othonia, IV ii 268. 
ottoana, Nereis, [I ii 300. 
ottonis, Ammochares, ITI 1 354, 356. 
ovata, Nereicola, IT 11 286, 287, 290. 
— Nereidicola, II 1 286n. 
ovigera, Spheerosyllis, II 1 159; IV ii 482. 
Owenia, IIT i 138, 224, 355. 
oxycephala, Aonides, III 1 186; 
484. 
— Nerine, III i 142, 187. 
— Scolecolepis, III i 187. 
— Scolepis, III i 187, 
oxycephalus, Spio, III i 187. 
oxycheeta, Lumbriconereis, II 11 378. 
Oxydromus, IT 1 115,116; IV iu 448. 
oxypoda, Nereis (Alitta), IT ii 335. 
Oxyuris, I ic 158. 
oxyurus, Lumbricus, 1 i 10; I ic 156. 
Pachysoma, IV ii 304. 
Peecilochetus, IIT i 135. 
Pedophylax, II i 235. 
IV 
rat 
483, 
