654 



INDEX 



Oxyaster (an aster with a small centrum 



and oxeate actines), 222 

 Ozytricha, 138 

 Oxytylote (a rhabdus of which one actine 



is oxeate, the other tylote or knobbed, 



the latter directed towards the surface 



of the Sponge), 224 



Pachychalina, 223 



Pachymatisnia, 215 ; P. johnstonia, 215, 

 222 ; P. normani, 215 



Pairing in Trichosphaerium, 54 



Pairing-cells, 31, 33 f. ; in Lankesteria, 95 

 see also Gametes, -Syngamy 



Pairing nuclei, state of, 34 ; of Ciliata, 150 ; 

 of Paramecium, 148 



Palaeaster, 476 



Palaeocoma, 476 



Palaeodiscus, 557 



Palaeoechinoidea, 556 



Palaeoechinus, 557 



Palephyra, 322 



Pali, 370, 385, 387 



Palmella state of Zooxanthella, 86 



Palmipes, 461, JfiJf. ; P. membranaceus, 

 464 



Pamphagus, test of, 59 f. 



Panceri, 339 



Pandorina morum, 111, 129 



Pansporoblast of Myxosporidiaceae, 107 



Pantostomata, 109 



Papula (including dermal gill), 432, 457 ; 

 compared to diplopore of Cystoidea, 599 



Paractinopoda, 570 



Paragaster, 187 



Paragastric canals, 416 



Paraglycogen ( = paramylum), 95 



Paragorgia, 333, 336, 351 



Paralcyonium, 349 



Paramecium, 137, 143 n., 151, 153 

 specific gravity of, 13 n. ; thigmotaxy of 

 20 ; reaction to repellent stimuli, 21 n. 

 thermotaxy of, 22 ; galvanotaxy of, 22 

 chemiotaxy of, 23 ; trichocysts of, 143 

 151 ; contractile vacuoles of, 143 n., 151 

 P. bicrsaria, 153 ; P. caudatum, 151 

 in conjugation, 148 



Paramoeba, 51 n., 110 ; nutrition of, 113 

 formation and regeneration of chromato 

 phores in, 115 ; P. eilhardii, 116 n. 

 reproduction of, 116 n. 



Paramuricea, 356 ; spicule, 336 



Paramylum ( = paraglycogen), 37, 95, 115 ; 

 in Gregarines, 95 ; in Flagellates, 115 ; 

 in Ciliata, 144 



Parangi, 121 n. 



Parapyle, 81 



Pararchaster, 466 



Parasites, in relation to brood - formation, 

 33 ; internal, belonging to Metazoa, 

 nutrition of, 38 ; of man, 57, 103 f., 

 108 n., 119 f., 152 ; of Radiolaria, 86 f. ; 



of Sticholonche, 86, 161 ; of plants, 88 

 of Acantharia, 86, 161 ; of Crucife 

 89 ; of Crustacea, 89 ; of earthwor 

 95 ; of centipedes, 99 ; of Epizoanthi 

 glacialis, 99 ; of Lithobius forficalus, 

 99 ; of cold-blooded Vertebrates, 102 ; 

 of rabbit, 102 ; of cattle, 102, 119 f . ; 

 of frog, 102, 124 ; of birds, 103 ; of 

 fish, 107 ; of silkworm, 107 ; of fish, 

 107, 119, 152 ; of sheep, 108 n. ; of 

 insects, 111, 123 ; of Amphibia, 111, 

 123 f., 158; of dog, 119; of horse, 

 119 ; of ox, 119 ; of Rodents, 119 ; of 

 owl, 120 f. ; of cockroach, 123 ; of mole- 

 cricket, 123 ; of Termites, 123 ; of 

 Metazoa, 152 ; of Ruminants, 152 ; of 

 Heliozoa, 155 ; of Raphidiophrys, 155 ; 

 of Hydra, 158 ; of newts, 158 ; of 

 Ciliata, 159 



Parasitic, Proteomyxa, 48, 88 f. ; Sporozoa, 

 48, 94 f. ; Flagellata, 48, 111, 119 f., 

 123 : Rhizopoda, 57 ; Ciliata, 152, 158 ; 

 Suctoria, 161 ; Hydrozoa, 268 f. 



Parasmilia, 401 



Parazoa, 181 



Parazoanthus, 406 : P. anguicomus, 406 ; 

 P. separates, 406 ; P. tunicans, 406 



Parenchymalia, 201 



Parenchymula, 227 



Parisis, 351 



Parker, 371 



Parkeria, 283 



Paroral cilia, 139 ; of Vorticella, 156 



Parthenogenesis, of malarial parasites, 

 jectured, 106 n. 



Pasteur, on organisms of fermentation 

 putrefaction, 43 ; on nature of pebr 

 {Nosema bombycis), 107 



Patellina, 59 ; reproduction of, 69 



Patina, 580 ; of Antedon rosacea, 582 ; 

 Tlummatocrinus, 589 ; of Hyocrii 

 590 ; of Rhizocrinidae, 590 ; of Pent 

 crinidae, 591 



Paxdinella, 52 ; test of, 54 ; pylome 

 54 



Pavonia (Fungiidae, 403), 390 



Paxilla, 455 ; evolution of, 466 ; relat 

 to granules of Valvata, 471 



Paxillosa, 461, Jj.66 f. ; restriction 

 papulae to dorsal surface, 469 



Peachia, 366, 380 ; P. hastata, 370 



Pebriue, 107 



Pectinate pedicellariae, 456, 466 



Pectyllidae, 294 



Pectyllis, 294 



Pedal laceration, 372 



Pedal nerve, of Asterias rubens, 455 ; 

 Ophiothrix fragilis, 488 ; of Echinus 

 esculentus, 518 ; of Holothuria nigra, 

 566 



Pedicellaria, of Asterias rubens, 432 : of 

 A. glacialis, 434 ; of Asteroidea, 45C 



