957 



Xola 239. 



Nonionina 391, 526, (512. 



Nordsee, Faunist. 105, 804. 



Norites 385. 



Nor we gen, Fauuist. 168, 391. 



Nosema 228. 



Notholca 768. 



Nothosauria 539. 



Not. hosauridae 540. 



Nothosaurus 538. 



Notidanus 876. 



Notocotylc 318. 



Notodontidae 250. 



Notopterophorus 589. 



Notopygos 111. 



Nuclein (Infus.) 57. 



Nucleolus 194, 301, 310, 414. 



^ucula 141. 



Nudibranchia 444, 471, 547, 597, 601. 



Nuditestidae 683. 



Xiitzliche Tiere (Av.) 256. 



NycUa 279. 



Nyctiphanes 465. 



Xi/mphon 491. 



O. 



Obba 551. 



Oceanodroma 256. 



Ocellarplatten 427, 066. 



Ochodontia 253. 



Ocneria 239. 



Ocnerodrilus 616. 



Octobothrium 231, 232, 653. 



Octocotyle 231. 



Octocotylidae 230. 



Octodactylus 232. 



Octoplectanum 232. 



Octopoda 174, 374. 



Octopus 175. 



Octoatoma 233. 



Ocypodidae 866. 



Odinia 427. 



Odontaster 429. 



Odontoblasten (Gastr.) 19, 906. 



Odoiitoceti 188. 



Odontura 547. 



Odostomia 27. 



Oecanthus 239. 



Oedeinatin 43. 



Oedicnemidae 919. 



Oedicnemus 919. 



Oekotraustes 380. 



Oerstedia 101. 



Oesophagostomum 207, 524. 



Oesophagus (Amph.) 29, (Aster.) 565, - 



(Gastr.) 507, (Ins.) 594, (Tremat.) 



320, 586, - - (Tunic.) 131, 509. 

 Oesterreich-Ungarn, Faunist. 15, 58, 



171, 235, 238, 369, 372, 407, 548, 716, 



745. 789, 827. 

 Oestrella 864. 



oikoblasten (Append.) 150. 



Oikopleura 698. 



Oithona 433. 



Olenellus 522. 



Oligochaeta 168, 169, 401, 614, 616. 



618, 755, 791. 

 Oligophyodontismus 188. 

 Olifiosilicina 392. 

 Oligostrophus 242, 243. 

 Oligotoma 698. 

 Oligotrophus 439. 

 Olivet, 20. 

 Olocratus 636. 

 Ohjnthia 698. 

 Ommatostrephes 175. 

 Omosaurus 406, 479. 

 Omphalotropis 553. 

 Onchidium 472. 

 Oncidiidae 163, 605. 

 Oncorhynchus 166. 

 Oncosphaera 317. 

 Onesimus 864. 

 Oniscodea 901. 

 Oniscomorph a 172, 631. 

 Onustus 657. 



Ouychophora Syst. 856, Faun. 856, 

 Biol. 856, Organ. 856, - - Genit. 



755, - - Entwickl. 856. 

 Ootyp (Trem.) 9, 10, 321. 

 Oozoid 510. 

 Oozoit 534. 

 Operculina 391. 



Operculum (Gastr.) 22, 658, - - (Radiol.) 315. 

 Opheliidae 855. 

 OpMacantha 427, 581. 

 Ophiactis 427. 



Ophidia 75, 355, 370, 663, 797. 

 Ophidiaster 429. 

 Ophiernus 581. 

 Ophiocten 427, 581. 

 Ophioglypha 427. 

 Ophiomitra 427, 581. 

 Ophiomusium 427. 

 Ophioscolex 427. 

 Ophiotrema 581. 

 Ophiotuba 391. 



Ophiuridea 427, 456, 566, 581, 585. 

 Ophlitaspongia 167. 

 Ophriofhrix 427. 

 Ophryocotyle 720. 

 Ophrydornis 36. 

 (Jphryoscolecidae 831. 

 Ophryoscolex 831. 



Ophryotrocha 193, 259, 279, 303, 409. 

 Opilionidae 58, 808. 

 Opisthandria 628, 633. 

 Opisthegema 281. 

 Opisthobranchiata 19, 444. 471, 547, 



596, 597. 

 Opisthodrilus 616. 

 Opisthophthalmus 807. 

 Opisthopneumonie 163. 

 Opisthoporus 553. 



