596 INDEX. 
Xeetocraugon lar. 61. 
Nematopus Goesii, 92. 
Neptunea, 499. 
antiqua. 499. 
arata. 500. 
decemcostata, 458. 499. 
despecta, 499. 
despeota, var. tornata, 499. 
Ossiani, 509. 
propinqua, 601. 
pygmsea, 499. 
Stimpsoni, 458. 
terebralis, 507. 
(Sipho) cadatn, 506. 
(Sipho) propinqua, 501. 
(Sipho) terebralis, 507. 
Neptunella, 499. 
Neptunus Sayi, 121. 
Nudibranchiata, 
Nymphou, 10, 17. 
brevitarse, 20, 21. 
gigantuern, 17. 
gracilipes, 17, 18, 24. 
grossipes, 5, 20, 21, 24. 
hirsutura, 22. 
hirtipes. 22, 24. 
hirtum. 22, 23, 24. 
longitarse, 19, 20, 21, 24. 
mixtum, 20, 21, 24. 
Stroemii, 17. 
Nymphonida;, 16. 
N 3 Tnphum grossipes, 20. 
hirsutura, 20. 
Octocera, 360. 
Octopia, 360. 
Octopida?, 367. 
Ootopoda, 360. 426, 434. 
Oetopodiche, 367, 435. 
Octopus Bairdii. 349, 354, 368, 378, 421, 
435, 450. 
eatenulatus, 362. 
Groenlandicus, 375, 378. 
lentus, 351, 375. 435, 450. 
obesus, 375, 379. 435, 450. 
piscatorum, 377, 435, 450. 
punctatus, 252, 435. 
rugosus, 368, 435. 
tubereulatus, 362, 368. 
vulgaris, 253, 435. 
Ocythoidse, 364. 
Odostoraia, sp., 539. 
(Menestho) sulcata, 539. 
Oigopsida;, 426. 427. 
Omalaxis ? lirata, 529. 
Ommatostrephes, 385. 
megaptera, 387. 
Ommatostrephini, 387. 
Ommastrephes (Architeuthis) princeps, 210 
Bartramii, 223, 280* 289, 386. 
Ooindetii, 385, 387. 
ensifer, 402. 
Fabricii, 291, 292. 
gigas, 386. 
Ommastrephes Harvevi, 197. 
illecebrosa, 179, *191, 268, 281. 290. 
293, 307, 318, 403, 429. 
illecebrosus, 385, 386, 403. 
Kamtschatica. 387, 390. 
lobipennis. 252. 
magaptera, 386. 
pteropus, 223, 228. 
robusta, 195, 246, 251, 252. 
robustus, 195, 246. 
sagittatus, 268, 280, 281, 385, 387. 
Sloanii, 386. 
todarus, 241, 242, 385. 386, 387. 
Ominastrephida', 385, 387, 428, 430. 
Onychia, 250. 
Onchidoris muricata, 550. 
diaphana, 550. 
Onyehoteuthidse, 250, 427, 428. 
Onychoteuthis amoena, 291. 
Banksii, 292. 
Bergi, 246. 
Ophiactis Krebsii, 153. 
Ophiactis Miilleri, 153. 
Ophioceramis albida, 151. 
Januarii, 151. 
Ophiocnida scabriuscula, 1 55. 
Loveni, 155. 
Ophiocoma echinata, 152. 
Riisei, 152. 
Ophiolepis paucispina 151. 
Ophiomyxa flaccid a, 155. 
Ophionereis reticulata, 152. 
Ophiophragmus Loveni, 155. 
Ophiopsila Riisei, 152. 
Ophiostigma isacanthum, 155. 
Ophiothrix violacea, 152. 
Ophiothrix Suensonii, 153. 
Ophiura appressa, 151. 
brevispina, 151. 
cinerea, 150, 151. 
Januarii, 151. 
Ophiuroidea, 150. 
Oreaster gigas, 149. 
Oxinoe glabra, 51 7. ^ 
Paguristes, 50. 
Pagurus pubescens, 49, 50. 
Palremonetes vulgaris, 37, 88, 125, 127. 
Pahemon tenuicornis, 122. 
Palemon natator, 122. 
tenuirostre, 122. 
Pallene, 5, 8, 10. 
brevirostris, 9. 
discoidea, 10, 12. 
empusa, 9, 24. 
hispida. 10. 
intermedia, 10. 
spinipes, 10. 
Pallenidm, 8. 
Palceraon natator, 122. 
Paudalus annulicornis, 87, 128. 
borealis, 86, 87, 125, 128, 134. 
levigatus, 87, 88. 
