INDEX. 



539 



Monomya, 225 

 Monostomum capitellum, 205 



,, mutabile, 205, 206 



Monotrochos, 330 

 Montacuta, 260, 262 

 Musca, 396 

 Muscidse, 420, 423 

 Myobia, 444, 445 

 Myrianida, 343 

 Myriapoda, 22, in, 113, 387, 394, 395, 



4 r 3> 458 

 Myriothela, 155 

 Myrmeleon, 396 



Mysis, 120, 469, 472, 486, 504, 509, 525 

 Mytilus, 260, 261 

 Myxinoids, 5 

 Myxispongire, 145 

 Myzostomea, 369 



Nais, 342 



Nassa mutabilis, loi, 226, 227, 233, 262, 



278, 279, 288, 324 

 Natantia, 487 

 Natica, 237, 283 

 Nauplius, 5, 16, 460, 461, 463, 465, 466, 



4 6 9. 4/3> 49> 49i> 493' 497 



Nautilus pompilius, 253, 276 



Nebaliadce, 459, 465, 486 



Nematoda, 45, 46, 50, 66, 74, 75, 371, 



373. 374. 37 6 

 Nematogens, 131 

 Nematoidea, 18, 84, 94, 371, 374 

 Nematus ventricosus, 13, 427 

 Nemertea, 94, 189, 196, 202, 204 

 Nemertines, 30, 31, 33, 93, 136, 195, 



202, 328, 333, 424 

 Nephelis, 82, 346, 349, 350, 351, 352, 



354 

 Nereis, 343 



,, diversicolor, 319 



,, Dumerilii, 343 

 Neritina, 229, 237 

 Neuroptera, 396, 401, 420, 421 

 Neuroterus ventricularis, 428 

 Notonecta, 395 

 Nototrochae, 330, 353 

 Nudibranchiata, 229, 241 



Ocellata, 184 



Octocoralla, 152, 179 



Octopus, 248 



Odontophora, 225, 257, 271 



Odontosyllis, 333 



Oedogonium, n 



Oligochreta, 42, 319, 321, 325, 330, 338, 



346, 352 

 Olynthus, 144 

 Oniscus murarius, 107, 108, 109, 120, 



5!6, 5 2 > 528 

 Opercula, 31 

 Ophiothryx, 36, 549 

 Ophidia, 64 



Ophiuroidea, 136, 544, 553, 562, 565, 



576 



Ophryotrochre puerilis, 333 

 Opisthobranchiata, 225, 232, 237 

 Ornithodelphia, 109 

 Orthonectidre, 136 



Orthoptera, 395, 414, 420, 421. 425, 426 

 Ostracoda, 459, 500, 510 

 Ostrea, 259, 260, 262 

 Oxyuridre, 46, 373, 374 

 Oxyurus ambigua, 374 

 ,, vermicularis, 375 



Pcecilopoda, 534 

 Paguridae, 477 

 Palremon, no 

 Palremonetes, 476 

 Palosmonince, 476, 511, 512 

 Palinurus, 478, 480 



Paludina, 66, 227, 229, 235, 270, 278, 

 280 



,, costata, 229 



,, vivipara, 226 

 Pandorina, 1 1 

 Parasita, 489 

 Pedalion, 221 



Pedicellina, 98, 292, 296, 299, 307 

 Pelagia, 167, 185 

 Penreince, 476 

 Penreus, 1 10, 113, 465, 469, 473, 474, 



504, 518 



Pennatulidre, 181 

 Pentacrinus, 5 

 Pentastomida, 539, 540 

 Pentastomum denticulatum, 540, 54! 



,, tamoides, 539, 540, 541 



Fercidae, 64 

 PerennichiBta?, 335 

 Peripatus, 5, 386, 411, 412, 413, 542 

 Petromyzon, 61, 63, 64, 74, 83 

 Phalangella, 304 

 Phalangidre, 436 

 Phallusia, 83 



Phascolosoma, 44, 355, 356, 361 

 Pholcus, 436, 442 

 Phoronis, 315, 355, 363, 364 

 Phoxinus Ire vis, 378 

 Phryganea, 396, 401, 409 

 Phylactolsemata, 292, 294, 297, 305, 306 

 Phyllobothrium, 218 

 Phyllodoce, 329 

 Phyllopoda, 1 6, 459, 461, 505 

 Phyllosoma, 479, 480 

 Phylloxera, 429 

 Physophoridre, 152, 162, 164 

 Pilidium, type of, 196, 200, 201, 202, 204, 



424 



Pisces, 5 

 Piscicola, 20, 43 

 Pisidium, 259, 260, 262, 264 

 Planaria Neapolitana, 193 

 Planorbis, 273, 281, 325 



