652 



THE OCEAN WORLD. 



Malleus alba, 362. M. vulgaris, ib. 

 Malleus alba, 362. 



„ vulgaris, 363. 

 Mantle in Molluscs, its uses, 318. 

 Marennes Oysters, 395. 

 Mean depth of the sea, 1-3. 

 IMeandrina cerebriformis, 1S4. 

 Meandriita cerebriformis, 1 81. 

 Mediterranean Sea, 6. 

 MedusidK, 156. 

 Meleagrina margaritifera, 364. 

 Mclcagrina margaritifera, 364, 365. 

 Merlangus vulgaris (Whiting), 621. 

 Millepora alcicornis, 189. 

 INIillepora alcicornis, 190. 

 Minyadidffi, 216. 

 Minyas carulea, 217. 

 Mitra episcopalis and M. papalis, 445. 

 jMitra episcopalis, 446. 



,, papalis, 446. 

 Molluscoida, 302. Organisation, 303. 

 Mollusca, 300. 



Mollusca, 316. Their characteristics, z'^. 

 Monad twihght, 100. 

 Monas leas, 10 1. 

 AIo7iodonta atts trails, 435. 



,, labia, 436. 



Monodonta australis and M. labia, 435. 

 Monsoons, 30. 



Montfort, Denis de, on the Kraken, 485. 

 Moon-fish (Orthagoriscus mola), 559. 

 Morrhua vulgaris (Cod), 614. 

 Morrhua vulgaris, 615. 

 Mounts Erebus and Terror, 50. 

 Mounts Erebus and Terror, 5 1 . 

 Mullet (MuUus), 622. A Roman luxury, 



623. 

 Mursena, 576. 



,, ponds, a passion with Roman 



patricians, 577. 

 Murex erinaceus, 460. 



,, haiistellujn, 459- 



,, scorpio, 460. 



;, lenuispina, 459. 

 Murex scorpio and M. erinaceus, M. 



tenuispina and M. haustelluni, 458. 

 Muschelkalk rocks, 264. 

 Mussels, 354. Organisation of, 355. 



Habits, ib. 

 Mussels of Aiguillon Bay, 361. 

 Mussels, files covered with spaum 0/, 2S9- 

 ,, piles covered with, '^bo. 



Mytilus byssus, mantle and oviduct of, 



356. 

 Mytilus edulis, 354. 

 Mytilus edulis, 354. 



N^autiltis pompilius,6i']\, 472, 473. 

 Nautilus pompilius, 472. 

 Nephthya, 246. 

 Nephrops norvegicus, 523. 

 Nephrops, 524. 

 Noctiluca miliaris, 87. 

 A^octiluca miliaris, 87. 

 Nummiilina perforata., 84. 

 Nummulites, 80. 

 Nummulites Rouaulti, 81. 



Octopus brevipes and O. horridus, 490. 



Macropus vulgaris, 491. 

 Octopus brevipes, 491. 

 ,, horridus, 491. 

 ,, macropus, 491. 

 ,, vulgaris, 490. 

 Oculina flabelliformis, 178. 

 Oculina virginea, 178. 

 Olaiis Magnus on the Kraken, 4S5. 

 Oliva erythrostoma, 450. 

 ,, irisans, 450. 

 ,, peruviana, 450. 

 ,, porphyria, ^^O. 

 Oliva erythrostoma, O. porphyria, O. 



irisans, and O. peruviana, 453. 

 Operculina, 85. 

 Ophiocoma Riisei, 271. 

 Ophioco7na Riisei, 271. 

 Ophiuradas, 269. 

 Orbulina tmiversa, 84, 

 Organisation of Foraminifera, 79. 

 ,, Infusoria, 91. 



,, Sponges, 60. 



,, Star-tishes, 254. 



Orthagoriscus mola, 558. 

 Ostracion, 561. 

 Ostreada (the Oyster), 372. 

 Oviibtm cor7iea 445. 

 ,, oviform is, 445. 

 volva, 445. 

 Oyster (Ostrea), 372. Its organisation, 

 ib. Reproduction, 375. Incubation, 

 ib. 

 Oysters, group ofyj"]. 

 Ovulum oviformis, O. cornea, O. volva, 

 445- 



