Linerges, 133, 139. 
L. mercurius, 133, 139. 
Lines of growth, 344, 347. 
Lineus marinus, 167. 
L. sanguineus, 168, 
Lingual ribbon, 303, 340. 
Lip, inner, 344. 
Outer, 344. 
Lithocysts, 135. 
Lithodes, 240, 270. 
L. maia, 240, 270. 
Lithodidz, 240, 270, 
Littoral, 23. 
Species, 308. 
Zone, 30. 
Littorina, 9, 309, 311, 325, 338, 
370. 
L. angulifera, 325, 372. 
L. irrorata, 325, 372, 
L. litorea, 8, 41, 42, 325, 371. 
L. palliata, 42, 325, 372. 
L. planaxis, 325, 373. 
L. rudis, 41, 42, 325, 371. 
L. scutulata, 325, 373. 
Littorinella minuta, 12. 
Littorinidz, 325, 338, 370. 
Livona, 325, 362, 
L. pica, 268, 325, 362. 
Lizzia, 120. 
Lobata, 154, 156. 
TAREIEES: 240, 247, 250, 258, 259. 
261. 
Loligo, 464, 467, 469. 
L. brevis, 464, 469. 
L. Pealei, 464, 469. 
Lomentaria, 77, 85. 
L. Baileyana, 77, 85. 
Lophophore, 190, 193. 
Lophothuria, 228, 
L. fabricii, 228, 232. 
Loripes, 406, 443. 
L. edentula, 406, 443. 
Lottia, 324, 357. 
L. gigantea, 324, 357. 
Lovenia, 217, 227. 
L. cordiformis, 217, 227. 
Loxorhynchus, 241, 285. 
L. crispatus, 241, 285. 
Lucapina, 324, 358. 
L. crenulata, 324, 358. 
Lucernaria, 133, 136. 
L. auricula, 133, 136. 
Lucina, 311, 406, 442. 
L. californica, 406, 443. 
L. dentata, 406, 443. 
L. floridana, 406, 442. 
L. nuttallii, 406, 443. 
L. pennsylvanica, 406, 442. 
L. tigrina, 406, 442. 
Lucinidz, 406, 442. 
Luidia, 204, 209. 
L. alternata, 204, 209. 
L. clathrata, 204, 209. 
L. senegalensis, 204, 209. 
Lumbriconereis, 161, 179. 
L. tenuis, 161, 179. 
Lunatia, 12, 309, 314, 325, 367. 
L. heros, 10, 12, 44, 325, 367. 
L. lewisii, 325, 368. 
L. triseriata, 325, 367. 
Lunules, 224, 303, 418. 
Lyngbya, 48. 
L. zstuarii, 50. 
? 
INDEX 
L. ferruginea, 50. 
L. majuscula, 50, 
M 
Macoma, 406, 444. 
M. baltica, 406, 445. 
M., nasuta, 406, 444. 
M. proxima, 406, 445. 
M. secta, 406, 444. 
M. tenta, 406, 445. 
Macrocystis, 35, 63. 
M. pyrifera, 36, 70. 
Macrura, 240, 258, 259, 272. 
Mactra, 310, 406, 410, 446. 
M. lateralis, 406, 447. 
M. ovalis, 406, 447. 
M. similis, 406; 447. 
M. solidissima, 406, 446. 
Mactridz, 406, 446. 
Madreporic plate, 201, 203, 206, 
218. 
Maiidz, 241, 284. 
Malacostraca, 239, 257. 
Mandibles, 246, 258. 
Mantle, 303, 316, 319, 328, 331, 
410. 
Mantle cavity, 303, 319, 336. 
Mantle fusion, 412. 
Margarita, 309, 325, 360. 
M. cinerea, 325, 360. 
M. helicina, 12, 44, 325, 360. 
M. undulata, 325, 360. 
Margin, 417. 
Anterior, 417. 
Dorsal, 417. 
Posterior, 417. 
Ventral, 417. 
Marginella, 311, 327, 399. 
M. apicina, 327, 399. 
Marginellida, 327, 399. 
Marine invertebrates, 97. 
Maxille, 243, 246, 258. 
Maxillipeds, 243, 246, 258. 
Meckelia, 160, 169. 
M. ingens, 160, 169. 
M. rosea, 160, 169. 
Mediaster, 204, 209. 
M. zqualis, 204, 209. 
Megalops, 248, 273. 
Meleagrina margaritifera, 
313, 430, 431. 
Melita nitida, 290. 
Mellita, 217, 225. 
M. testudinata, 217, 225. 
Melobesia, 78, 96. 
Melongena, 311, 327, 396. 
M. corona, 327, 396. 
Membranaceous, 27. 
Membranipora, 188, 192, 196. 
M. lineata, 188, 196. 
M. pilosa, 43, 188, 196. 
M. tenuis, 188, 197. 
Menippe, 241, 280. 
M. mercenaria, 241, 280. 
Meristomes, 242, 294. 
Mesoderm, ror, 118. 
Mesogleea, 62; 68. 
M. divaricata, 62, 68. 
M. virescens, 62, 68. 
485 
Metalia, 217, 227. 
M. pectoralis, 217, 227. 
Metameres, 243. 
Metapodium, 376. 
Metazoa, ror. 
Metridium marginatum, 42, 
Microciona, 100, 107. 
M. prolifera, 100, 107. 
Microcladia, 78, 93. 
M. borealis, 78, 93. 
M. Coulteri, 78, 93. 
Millepora, 129. 
M. alcicornis, 117, 129. 
Mitra, 313. 
Mnemiopsis, 154, 157. 
M. Leidyii, 154, 157. 
Modiola, 309, 405, 426. 
M. modiolus, 405, 428. 
M. nigra, 429. 
M. plicatula, 405, 429. 
M. recta, 405, 429. 
M. tulipa, 405, 429. 
Meera levis, 2go. 
Moina, 238. 
Moira, 217, 226. 
M. atropos, 217, 226. 
Molgula, 473, 475. 
M. arenata, 473, 476. 
M. manhattensis, 473, 475. 
M. pellucida, 473, 476. 
Mollia, 188, 197. 
M. hyalina, 188, 197. 
Mollusca, 300, 305, 328, 
Monoceras, 312, 326, 387. 
M. engonatum, 326, 388. 
M. lapilloides, 326, 388. 
Monomyarian, 303, 430. 
Monostroma, 26, 51, 55. 
Monotocardia, 300, 325, 364. 
Morphology, 20. 
Moss-animals, 191. 
Mother-of-pearl, 431. 
Moulting, 248, 259, 263. 
Mounting seaweeds, 16. 
Mouth, $29, 333. 
Mud-crabs, 12. 
Muddy shores, 12. 
Multivalve, 307. 
Murex, 326, 331, 382. 
M. fulvescens, 383. 
M. pomum, 3826, 383. 
M. rufus, 326, 382. 
M. tenuispina, 343, 347. 
Muricea_ specifera, Plate 
XLVI. 
Muricidz, 326, 381. 
Muricing, 326, 381, 385. 
Muscles, 248. 
Musical sands, 2. 
Mussel, great horse-, 428. 
Mussels, 43, 321, 426, 
Mya, 309, 407, 456. 
M. arenaria, 3, 42, 44, 311, 
407, 456. . 
Mycedium fragile, Plate 
XLV. 
Myide, 407, 456. 
Myrionema, 62, 68. 
Mysis, 239, 257. 
M. sternolepsis, 239, 257. 
Mytilidz, 405, 426. 
Mytilus, 41, 309, 405, 426. 
M. californicus, 405, 428. 
