6S8 



INDEX 



Post-abdomen = fourth chamber of Mon- 

 axonic Radiolarian shell, 84 



Posterior dorsal process, of ciliated band, of 

 Bipiimaria and Ophiopluteus, 606 ; of 

 Echinopluteus, 607 ; of Auricularia, 608 



Posterior lateral process, of ciliated band, 

 of Bipiunaria, Ophiopluteus, and Ophio- 

 tlirix fragilis, 606 ; of Echinopluteus, 

 607 



Posterior wreath, of Peritrichaoeae, 138 ; 

 of Vorticella, 156, 157 ; of Tnchodina, 

 158 



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

 naria and Ophiopluteus, 606 ; of Echino- 

 pluteus, 607 



Potato, rest and germination of, 32 



Poteriodendron, 111 



Potts, 180 



Pouchet (the elder), on spontaneous genera- 

 tion, 43 



Pouchet, Georges, on Protozoa, 45 



Pouchetia, 110 



Pourlalesia, 554 \ P- j^ff'i'^ysh 554 



Pourtalesiidae, 554n. 



Prae-oral process, of ciliated band, of 

 Bipiunaria and Ophiopluteus, 606 ; of 

 Echinopluteus, 607 — see also Pre-oral 



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



Prma, 300, S06 



Prayinae, S06 . 



Pre-Cambrian Eohinodermata, 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 JSchinus esculentws, 506 ; 

 of Cidaridae, 532 ; of Arbaoiidae, 532 ; 

 of Eohiuothuriidae, 532, 535 ; of Colobo- 

 centrottis, 532 ; of Heterocentrotus, 532 ; 

 of Echinocardium cordatum, 550 



Primnoa, S54 ; P. lepadifera, 338 



Primnoidae, 330, 335, 354 



Pringsheim, on exogamy in Pandorina, 

 34 n. 



Prionastraea {Astraeidae, S99), 375 



Proboscis, of central capsule of Phaeodaria, 

 76 



Progamic brood-division ( = abrood-division 

 to produce gametes), 96, 100 



Proheliolites, SJfG 



Promachocrinus, 694- 



Proper wall of Perforate Foraminiferal 

 shell, 69, 63, 66 



Prophylaxis, against mosquitos and mal- 

 arial fever, 103, 106 ; against pebrine 

 in silkworms, 107 



Prosodus, 210 



Prosopyle, 170 



Prostalia, 201 



Protanthea, 377 



Protantheidae, 377 



Protaspidochirota, 578 



Proteohinoidea, 623 



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

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

 Flagellates, 110 ; — gi-auules or spherules 

 of Ciliata, 144 ; of Suctoria, 161 



Proteleia, S18 



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. haeckeli, 182 



Protista, 3 f. — see Protozoa 



Protoalcyonaoea, 329, 34^ 



Protoclypeastroidea, 5^8 



Protocnemes, 367 



Protocoelomata, 616, 617 



Protodendrochirota, 578 



Protoholothuroid, 577 



Protoholothuroidea, 578 



Protohydra, 256 



Protomastigaceae, 110 f., 112 ; external 

 plasmatic layer of, 113 



Protomerite, of Gregarines, 97, 98 



Protoniyxa, 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 Eadiolaria, 79 f. ; 

 of Stylonychia, 140 



Protospongia fenestrata, ^07, 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, SO 



Protractor muscles of Aristotle's lantern, 

 5>6 



Protriaene (a triaene in which the cladi 

 [branches] point forwards or in the 

 opposite direction to the rhabdome or 

 shaft), 224: 



Prouho, on transverse fission in Gonactinia, 

 371 n. ; on gemmiform pedicellariae of 

 Echinoidea, 509 ; on habits of Doro- 

 cidaris papillata, 535 



Prunoidea, 77 



Prunophracta, 78 



Psammocora (Pungiidae, 403), 390 



Pseudambulacrum, 599 



Pseudaxonia, 360, 353 



Pseudomonocyclic, 594 



Pseudonavicella, 96 



Pseudophellia arctica, 379 



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

 streaming of granules in, 17 ; Lang's 

 classification of, 47 n. ; transition to 



