SUBJECT INDEX. 



473 



Noctiluca, 27 



Nuclein, 22 



Nucleolus, 403, 407 



Nucleus, 22, 24, 180, 310, 401, 407 



Nutrition, types of, 21 



Nycteribia, 359 



I 442 



Ocelli, 329, 359, 361 

 Ocnus hrunnevs, 221 

 Ooidina coronalis, 253 

 Octopoda, 72, 367 

 Octopus, 72, 105, 142, 144, 168, 179, 



202, 234, 239, 286 

 Odontqphora, 70 

 Odontophore, 69, 72 

 (Esophageal glands, 38 

 (Esophagus, 34-36, 38-44, 47i 49-52, 



SS-60, 65, 70, 87, 92 

 Olfactory organs, 349, 351, 352, 356, 



361, 363, 366, 367 

 Oligochmta, 37, 38, 87, 90, 223, 256, 



257, 321, 388, 424 



Omentum, an, 60 



Ommastrephes, 370 



Onchidum, 237 



Oniscus, 57, 396 



Onychqplwra, 40, 429 



Onychoteuthis, 370 



Operculum, an, 155, 157, 450 



(Ahiactis viretis, 220 



Uphiolepis ciliata, 416 

 squamata, 415 



Ophiwa, 385 



OpUuridea, 34, 352, 380, 383, 386, 

 415, 416, 418 



Ophrydium, 81 



Or'chestia, 243 



Organ of Bojanus, 68, 143, 202, 204, 



243, 276, 282, 283 

 Organ of Semper, 366 

 Organs of special sense, 345-373 

 Orgyia antiqua, 262 

 pudibunda, 262 

 Oribates, 440 

 Origin of life, 456 

 Orthqptera, 41, 42, 46, 63, 194, 327, 



^357, 394, 433, 435 

 Oryctes nasicornis, 135, 136 

 Oscula, 31, 243, 408 

 Oatracoda, 55, 63, 192, 442, 443 

 Ostrea, 67, 69, 104, 105, 234, 237, 



238, 283, 397, 448 

 Ovipositor, a modified, 45 

 Ovipositors, 356, 438 

 Oxychlorocruorin, 154 

 Oxyhsemoglobin, 131 

 Oxyuria ambigua, 427 



Pagarus, 233, 412, 446 



Pagwridce, 58, 446 



Pakeodictycptera, 43 



Palcemon, 59, 104, 396 



Pallium, 66, 70, 365 



Pcdinurus quadricornis, 234 

 vulgaris, 138, 178 



Palpi, 42-45, 67, 361, 441 



Paludicella, 66 



Paludina vivipera, 169, 170, 237-239 



Pampliagus, 25 



Pancreas, the Invertebrate, 35, 38, 

 40, 49-51, 55-58, 60, 64, 67, 72, 73, 

 76, 88, 91, loi, 103-108, III, 116, 

 238 



Pancreatin, 82, 89, 96 



Pandora, 448 



Pantostomate being, a, 26 



Papilio feronia, $i)z 

 Machaon, 162 



ParaglosssB, 45 



Paramoecia, 28, 30, 81, 120, 207, 240, 



346, 375, 407, 408 

 Parapodia, 224, 388, 426 

 Parenchyma cells, 265 

 Parthenogenesis, 401, 415, 419, 431, 



436, ,437, 447 

 Patella vulgata, 72, 105, 108, 237, 238, 



239, 284, 285 

 Pearls, formation of, 277 

 Pecten, 67, 104, 368, 448 

 Pectostraca, 50, 56 

 PediceUina, 447 

 Pediculidce, 359 

 Pelagic organisms, 250, 251 

 Pelodytes, 426 

 Penellina, 363 

 Pentacrinin, 216 

 Pentastomida, 439 

 Pentastomum, 47, 439 

 Peptones, 93 

 Perforata, 25 



Pericardium, a, 191, 193, 282 

 Peridinece, 347, 376 

 Peripatus, 40, 260, 322, 324, 429 

 Periplaneta, 265, 325, 326, 327, 431, 



432 . 

 Peritricha, 377 

 Perivisceral cavity, 122, 127, 128 



129, 189, 200, 224, 236, 256, 276 

 Perlidm, 394 

 Phallusia mentula, 76 

 Pharynx, a, 35-40, 48-50, 65, 87, 236, 



239, 387. 388 

 Phascolosma elongatum, 130 

 PUogophora meticulosa, 158-161 

 Pholas, 69 

 Pliolcus rivulatus, 49, 166 



