654 



INDEX 



Oxyaster (an aster with a small centrum 



and oxeate actiues), 222 

 Oxytricha, 138 

 Oxytylote (a rhahdus of -whicli one actiue 



is oxeate, the other tylote or knobbed, 



the latter directed towards the surface 



of the Sponge), 224 



Pachychalina, 223 



Pachymatisma, 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 Paramecmm, 148 

 Pcdaeaster, 476 

 Palaeocoma, 476 

 Palaeodiscus, 557 

 Palaeoechinoidea, 556 

 Palaeoechimis, 557 

 Pnlephyra, 322 

 Pali, 370, 385, 387 

 Palmella state of Zooxanthella, 86 

 Palmipes, 461, 4^4 ; P- membmnaceus, 



464 

 Pamphagus, test of, 59 f. 

 Panceri, 339 



Pandorina monim, 111, 129 

 Pansporoblast of Myxosporidiaceae, 107 

 Pantostomata, 109 

 Pai^ula (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 ; 



ehemiotaxy of, 23 ; trichocysts of, 143, 



151 ; contractile vacuoles of, 143 n., 151 ; 



P. hursaria, 153 ; P. caudaiuvi, 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 Gregariues, 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 f. ; 

 of Acantharia, 86, 161 ; of Crucifers, 

 89 ; of Crustacea, 89 ; of earthworm, 

 95 ; of centijiedes, 99 ; of Epizoanthus 

 glacialis, 99 ; of Llthohius fvrjicalus, 

 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 tish, 

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

 iusects. 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. separatus, 406 ; P. tunicans, 406 



Parenchymalia, 201 



Parenchymula, 227 



Parisis, 351 



Parker, 371 



Parkeria, 283 



Paroral cilia, 139 ; of Vorticella, 156 n. 



Parthenogenesis, of malarial parasites, con- 

 jectured, 106 n. 



Pasteur, on organisms of fermentation and 

 putrefaction, 43 ; on nature of pebrine 

 {Nosema hombycis), 107 



Patellina, 59 ; reproduction of, 69 



Patina, 580 ; of Antedon rosacea, 582 ; of 

 Tha^imatocrimis, 589 ; of Hyocrinus, 

 590 ; of Rhizocrinidae, 590 ; of Peuta- 

 erinidae, 591 



I'duliiieda, 52 ; test of, 54 ; pylome of, 

 54 



Pavonia (Fungiidae, 403), 390 



Paxilla, 455 ; evolution of, 466 ; relation 

 to granules of Valvata, 471 



Paxillosa, 461, 466 f. ; restriction of 

 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 neive, of Asterias rnbens, 455 ; of 

 Ophiothrix fragilis, 488 ; of Echinus 

 esculentus, 518 ; of Uolothuria nigra, 

 566 



Pedicellaria, of Asterias rubens, 432 ; of 

 -I. glacialis, 434 ; of Asteroidea, 456 ; 



