659 



tla^ella, 47 n. ; of Rliizo])oda, 49, 

 r.O f.. :<2 ; of Foraiiiiiiifera, 49, 50, 60, 

 61, 65 ; of Microgromia, 59, 60 ; of 

 Lidterkiihnia, 61 , of AUogromia, 65 ; 

 of Miliola, 65 ; of RotaUa, 65 ; of 

 SuHamulina, 65 ; of Heliozoa, 49, 50, 

 71, 72 f. ; of Radiolaria, 49, 50, 79, 80 ; 

 of Lankcsteria, 96 n. ; of Flagellates, 

 109, 110 ; transitory, in Flagellates, 109 ; 

 of Stentor, 152, 154 ; of young Oellius 

 varivs, 173, 174 



Pseuilopodiospores, 68 f. 



Pseudosjjora, 89 ; P. lindstedtii, 89 



Psilaster, 470 ; P. aatminatus, 469 



Psolus, 569, 573; P. e^hqJ2}i/er, 574, 

 575, 602 



Psychropotes, 572 



Pteraster, 455, 466 ; P. stdlifer, 465 ; 

 P. militaris, 466 



Pterasteridae, 455, 466 



Pterocephalus, 97 



Pteroeides, 359, 361 



Pteroeididae, 361 



Puti'balls, 91 



Pulsatile vacuole, 14 ; = Coutractile vacuole, 



q.V. 



I'ulsellum, 18, 114 



Punjab, douriue disease in, 119 



Pupa, of Holothuroidea, 615 



Pure cultures, 43 



Putrefaction, organisms of, 42 f., 116 f. 



Pycnolithus, 346 



Pi/cnopodia, 453, 4'^4 



Pygaster, 55S, 559 



Pygastrides, 546', 558 ; P. relictus, 548 



Fylonie, 53 ; of Rhizopods, 53 f. ; double, 

 in monstrous Rhizopods, 55 ; of Bia- 

 phorodon, 60 ; of Foraminifera, 64 ; of 

 Radiolaria, 83 ; of Sphaeropylida, 77 n. ; 

 of Nassellaria, 83 



Pyloric caeca (and duct), of Asterias 

 rubens, 439; oi Porcellanaster pacificus, 

 459 ; absent in Hyphalaster moseri, 459 



Pyloric sac of Asterias rubens, 438 



Pyramids, building-stone of, 70 



Pyrenoid, 37, 115; of Sphaerella, 126 



Pyrocystis, 110 \ P. fusiformis, 132 



J'yrsonympha, 111 ; flagella of, 114 



Pytheas, 223 



Pythonaster, 4^4 



Pythonasteridae, 46^^- 



I'yxicola, 13S, 158 



<^>iirtdnda, 52 ; Q. symmetrica, 65 ; test of, 



54 

 Quartan fever, a parasitic disease, 104 f. 

 Quartzites, Radiolarian, 87 

 (^I'lisillina, 224 

 Quatrefaijcs, de, 376 

 Quelch, 280 



ijuinquelocidina, 59, 65 f. 

 Quinqueloculine type, 67 



Radial blood-strand (or vessel), oi Asterias 

 rubens, 450 ; of Ophiothrix fragilis, 488 



Radial canal, of water-vascular system, 

 428 ; of Asterias rubens, 441 ; of Ophiu- 

 thrix fragilis, 480, 486 ; of Kchinus 

 vsculentus, 517 ; of Edunamclniins 

 p>arina, 547 ; of Ilolotlmria nigra, 560 ; 

 of Pelagothuria, 572 ; of Cystoidea, 

 580, 597 ; of Carpoidea, 580 ; of 

 Thecoidea, 580 ; of Crinoidea, 580 ; of 

 Blastoidea, 580, 599 ; oi Antedon rosacea, 

 583 ; development of, in Asterina 

 gibbosa, 611 ; in Holothuroidea, 615 ; in 

 Antedon rosacea, 619 



Radial fission in Volvocaceae, 110 f. 



Radial nerve-cord, of Asterias rubens, 444, 

 445, 446, 447 ; of Ophiothrix fragilis, 

 488 ; of Echinus escidentvs, 518, 519, 

 522 ; of Holothuria nigra, 566 ; of oral 

 system of Antedon rosacea, 584 ; of 

 coelomic system of A. rosacea, 584, 585 



Radial ossicle — see Radial Plate 



Radial perihaemal canal, oi Asterias 'rubens, 

 448; of Ophiothri.c fragilis, 488; of 

 Echinus esctdentns, 518, 524 ; of Holo- 

 thuria nigra, 566 



Radial plate, of Ophiothrix fragilis, 484 ; 

 of Cladophiurae, 500 ; of calcareous ring 

 in Ilolotlmria nigra, 566 ; in Holo- 

 thuroidea, 567, 569 ; in Elasipoda, 569 ; 

 in ;\lolpadiida, 569 ; in Dendrochirota, 

 569 ; of calyx in Antedon rosacea, 582, 

 584, 585 ; in Crinoidea, 588 ; in 

 Hyocrinus, 588, 590 ; in Rhizocrinidae, 

 588, 590 ; in Metacrinns, 588, 591 ; in 

 Pentacrinus, 588, 591 ; in llvlopus, 

 592 ; in Blastoidea, 599 ; development, 

 in Antedon rosacea, 619 f. 



Radiolaria, 49, 50, 75 i. ; streaming of 

 granules, 17; brood - formation, 33, 

 85 f. ; regeneration, 35 ; animal nutri- 

 tion of, 40 ; relations of, 49 ; fresh- 

 water ( = Heliozoa), 71; shells and 

 skeletons of, 77, 78, 80, 82 f., 84, 85 ; 

 symbiosis of Diatoms and yellow cells 

 (=Zooxanthclla) in, 82, 86 f., 125; 

 parasites in, 86 f., 161 ; Dreyer's scheme 

 of skeletal forms in meshes of an alveolar 

 system, 84 ; habitat, 87 ; census of, 87 ; 

 palaeontology, 87 ; students of, 88 



Radiolarian ooze, 87 



Radioniyaria, 324 



Railius, of Echinus escvlentus, 503 ; 

 synonym of compass, 526 ; of a Holo- 

 thuroid, 562 ; of Spatangoidea, 553 ; of 

 Antedon rosacea, 582; of Proniacho- 

 ciinus, 594 



Rain, bloody, 125 



Raiuey's tubes, 108 



Ramulina, 59 



Maphidiojjhrys, 71, 74 



Raspailia, 225 



