652 



INDEX 



Nerve-ring, of Asterias rubens, 444, 447 ; 

 of Ophiothrix fragilis, 488 ; of Echinus 

 esculentus, 518, 521, 527 ; of Antedon 

 rosacea, 583 ; outer, of A. rosacea, 585 



Nervous fibrils in Ciliata, 143 



Nervous system, in Animals, not in Plants, 

 39 f. ; of Asterias rubens, 444 f. ; of 

 Ophiothrix fragilis, 488 ; of Echinus 

 esculentus, 518 f. ; of Holothuria nigra, 

 566 ; of Antedon rosacea, 583 f. 



Neuron, 444 



Neurophane (= supposed nervous fibrils in 

 Ciliata), 143 n. 



Newts, Trichodina parasitic in, 158 



Nitriles in relation to nutrition, 36 



Noctiluca, 110, 132 f.; endosarc, 144 ; N. 

 miliar is, 133 



Nodosaria, 59, 63, QQ f. 



Nosema, 98 ; N. bombycis, 107 ; organism 

 of pebrine, 107 



Nubecxdaria, 59 



Nuclear apparatus, of Infusoria, 48, 136 ; 

 of Ciliata, 139 f., 144 f . ; of diffused 

 granules, in marine Ciliata, 144 n. ; of 

 Suctoria, 159 : -bipartition in Tricho- 

 sphaerium, 54: -reduction of Actino- 

 sphaerium, 75 n. ; of Monocystis, 96 ; 

 of Coccidiaceae, 100, 104 f. ; of Acysto- 

 sporidae, 104 f. ; of Myxosporidiaceae, 

 107 ; of Flagellates, 116 n. : divisions, 

 in spores of Lankesteria, 95 see also 

 Mitosis, Karyokinesis 



Nuclearia, 70 



Nuclein mass ( = karyosome), 24 



Nucleinic acid, 7 n. 



Nucleole, nucleolus, 7, 24, 25 f., 27 ; of 

 Sea-urchin ovum, 7 ; of Sphaerella, 

 126 



Nucleolidae, 554 



Nucleolites, 554 



Nucleoplasm, 6 



Nucleoproteids, 12 



Nucleus, 6 ; of cell, 6 f. ; of Amoeba, 5 f. ; 

 of A. polypodia, 10 ; resting, function 

 of, 24 n : in mitosis, 25 f. , 27 f. ; of 

 Euglypha, 29 ; of Paramecium cau- 

 datum, 148 : pairing state of, 34 ; of 

 Ciliata, 150 f. ; of Paramecium cau- 

 datum, 148 : of Rhizopods, 52 ; of Pelo- 

 myxa, 52 ; of Microgromia socialis, 60 ; 

 of Foraminifera, 62 ; of mega- and micro- 

 spheric forms of Foraminifera, 68 f. ; of 

 Heliozoa, 71, 72, 74 ; of Clathrulina, 

 74 ; of Radiolaria, 76 ; of Collozoum 

 inerme, 76 ; of Myxomycetes, 92 ; of 

 Sporozoa, 95 f. ; of Gregarines, 95 f., 

 98 f. ; of Bodo saltans, 117 ; kineto-, of 

 Trypanosoma noctuae, 120, 121 ; trophic, 

 of T. noctuae, 120 ; of Choanoflagellates, 

 122 ; of Opalina, 123 ; of Maupasia, 

 124 ; of Sphaerella, 126 ; of Volvox, 

 126 ; of Noctiluca, 133 : fusion- or 



zygote-, 150 ; of Paramecium caudatut 

 148 see also Meganucleus, Micronucleus, 

 Gametonuclei, Nuclear apparatus 



Nuda, 423 



Nummulitaceae, 59 



Nummulites, 59, 63, 70 



Nussbaum, on regeneration in Protozoa, 

 35 n. ; on Hydra, 254 



Nutrition, 9 ; animal and vegetal, 35 f. ; 

 of Flagellates, 110 f., 113; of Dino- 

 flagellates, 130 f. see Holozoic, Holo- 

 phytic, Saprophytic: of Alcyonaria, 

 339 



Nutritive function of granular cytoplasm of 

 muscle-cell, 19 



Nuttall, history of discoveries on Acysto- 

 sporidae, 103 



Nutting, 276, 280 n. 



Nyctotherus, 137 ; habitat of, 152 



Obelia, 280 



Oceanapia, 223 



Ocellus, 252 



Octactine, 200 



Octactinellida, 208 



Octotremacis, 346 



Ocular plate of Echinus esculentus, 512 



Oculina, 399 



Oculinidae, 399 



Ocyroe, 420 ; 0. crystallina, 419 



Ocyroidae, 42 



Odinia, 474, 475 



Oecology of Protista, 43 



Oesophagus, of Asterias rubens, 438 ; 



Echinus esculentus, 516 ; of Holothuria 



nigra, 562 ; of Antedon rosacea, 583 ; 



of Dipleurula, 605 

 Ogilvie, M., 401 n. 

 Oikomonadidae, 111 

 Oikomonas, 111, 112 



Oil-drops, of Radiolaria, 79 f. ; luminous, 80 

 Oil-globules, 37 ; of Ciliata, 144 

 Oleocyst, 305 

 Oligotrichaceae, 137, 155 

 Olindias, 291 ; 0. millleri, 291 

 Olindiidae, 289, 291 

 Olindioides, 291 ; 0. formosa, 291 

 Olynthus, 185 



Omne vivum, ex ovo, 42 ; ex vivo, 44 

 Onychaster, 203 

 Onychaster, 502 

 Oocyte (a cell which by unequal divisk 



or mere nuclear divisions becomes cc 



verted into an oosphere), 100 

 Oogamete of Coccidiaceae, 100 f. 

 Ookinete (active zygote) or oosperm, 



Acystosporidae, 104 f. ; of Trypanc 



soma noctuae, 120 

 Oolitic limestones, nucleus of concretions 



of, 70 

 Oosperm, 34 ; of Sporozoa, 96 f. ; of Volvox 



globator, 127 f. 





