'58 



INDEX 



Post-abdomen = fourth chamber of Mon- 

 axonic Radiolarian shell, 84 



Posterior dorsal process, of ciliated band, of 

 Bipinnaria and Ophiopluteus, 606 ; of 

 Echinoplutens, 607 ; of Aiiricularia, 608 



Posterior lateral process, of ciliated band, 

 of Bipinnaria, Ophiopluteus, and Ophio- 

 thrix fragilis, 606 ; of Echinoplutens, 

 607 



Posterior wreath, of Peritrichaceae, 138 ; 

 of Vorticella, 156, 157 ; of Trichodina, 

 158 



Post-oral process, of ciliated band, of Bipin- 

 naria and Ophiopluteus, 606 ; of Echino- 

 plutens, 607 



Potato, rest and germination of, 32 



Poteriodendron, 111 



Potts, 180 



Pouchet (the elder), on spontaneous genera- 

 tion, 43 



Pouchet, Georges, on Protozoa, 45 



Pov.chetia, 110 



Pourlalesia, 554 ; P- jeffreysi, 554 



Pourtalesiidae, 554 ^i* 



Prae-oral process, of ciliated band, of 

 Bipinnaria and Ophiopluteus, 606 ; of 

 Echinoplutens, 607 — see also Pre-oral 



Pratt, E. M., 339, 348 n., 399 n. 



Praya, 300, 306 



Prayinae, 306 



Pre-Cambriau Echinodermata, 623 



Precious Corals, 326, 352 



Pre-oral, cilia, 139 ; ridge, 139 ; undulat- 

 ing membrane, 139 — see also Prae-oral 



Preyer, on the response of Asteroidea to 

 stimuli, 446 f. ; on the intelligence of 

 Ophiuroidea, 488 f. 



Primary spine, of Echinus csculentus, 506 ; 

 of Cidaridae, 532 ; of Arbaciidae, 532 ; 

 of Echinothuriidae, 532, 535 ; of Coloho- 

 centrotus, 532 ; of Heteroccutrotus, 532 ; 

 of Echinocardium cordatum, 550 



Primnoa, 354 ; P- lepadi/era, 338 



Primnoidae, 330, 335, 354 



Pringsheim, on exogamy in Pandorina, 

 34 n. 



Prionastraea (Astraeidae, 399), 375 



Proboscis, of central capsule of Phaeodaria, 

 76 



Progamic brood-division ( = abrood-division 

 to produce gametes), 96, 100 



Proheliolites, 346 



Promachocrinus, 594 



Proper wall of Perforate Foraminiferal 

 shell, 59, 63, 66 



Prophylaxis, against nioscjuitos and mal- 

 arial fever, 103, 106 ; against pebrine 

 in silkworms, 107 



Prosodus, 210 



Prosopyle, 170 



Prostalia, 201 



Protanthm, 377 



Pi-otantlieidae, 377 



Protaspidneliiiota, 578 



Protfcliinoi.lea, 623 



Proteid(s), 12 ; digestion of, 15 ; forma- 

 tion of, 36 ; crystals, 37 ; — reserves in 

 Flagellates, 110 ; — gi-anules or spherules 

 of Ciliata, 144 ; of Suctoria, 161 



Protdeia, 218 



Proteomyxa, 48 f., 50, 88, 89 f. ; rela- 

 tions of, 40 ; studied by botanists, 45 ; 

 parasitic in plant-cells, 48 ; distinctions 

 from Flagellates, 109 



Proteoses, 15 



Proterospongia, 111, 113, 122, 181 f. ; 

 P. luieckeli, 182 



Protista, 3 f.^see Protozoa 



Protoalcyonacea, 329, 34'^ 



Protoclypeastroidea, 548 



Protocnemes, 367 



Protocoeloniata, 616, 617 



Protodendrochirota, 578 



Protoholothnroid, 577 



Protoholothuroidea, 578 



Pmtnhydra, 256 



Protoniastigaceae, 110 t, 112 ; external 

 plasmatic layer of, 113 



Protomerite, of Gregarines, 97, 98 



Protomyxa, 89 



Protopelmatozoa, 623 



Protophytes, 3 n. 



Protoplasm, 3 f. ; structure of, 6 ; re- 

 fractive index of, 6, 11 n. ; movements 

 of, 7 ; specific gravity of, 13 n. ; of 

 Protozoa, 46 f. ; of Radiolaria, 79 f. ; 

 oi' Styloni/chia, 140 



Protosjjongiafeneslrata, 207, 207 



Prototheca, 385, 386 



Protozoa, 1 f., 44 f. ; characters, 40 ; para- 

 sitic, 40, 46 ; literature, 45 f. ; geogra- 

 phical distribution, 47 f. ; habitat, 47 ; 

 classification, 50 



Protractor muscles of Aristotle's lantern, 

 5J6 



Protriaeue (a triaene in which the cladi 

 [liranches] point forwards or in the 

 opposite direction to the rhaljdome or 

 shalt), 224 



Proulio, on transverse fission in Gonactinia, 

 371 n. ; on gemnuform pedicellariae of 

 Echinoidea, 509 ; on habits of Doro- 

 cido.ris papillala, 535 



Priiuoidea, 77 



Prunophracta, 78 



Psammocom (Fungiidae, 403), 390 



Pseudambulacrum, 599 



Pseudaxonia, 350, 353 



Pseudomonocyclic, 594 



Pseudonavicella, 96 



I'ncud.o^'heUia arctica, 379 



Pseudopodia (urn), 4 f., 17, 47, 49, 50 f. ; 

 streaming of granules in, 17 ; Lang's 

 classification of, 47 n. ; transition to 



