IXDEX TO THE PORIFERA 



17 = 



Pemmatites, 150 

 Peixares, 148 

 pentactiual, 38, 116 

 Pericharo-i; 110 

 PeriphmyeUa, 124 

 peristoiuial skeleton, 105 

 Peronella, 111 

 PeronideUa, 111 

 person, modifications of, in 



sponges, 5 

 Perty, 89 

 Pdromka, 149 

 Petrosia, 151 

 Petrostronia, 100, 106, 109, 



111 

 phagocytes, 58, 62, 85 

 phagocytosis, 82, 83 

 Phakdlixt, 23, 153 

 Pharetronidae, 106, 109, 



157, 168 



— diagnosis and genera, 110 

 Pharetrospongia, 111 

 Phdloderma, 152 

 Pheronema, 123 

 Phloeodktinae, diagnosis 



and genera, 152 

 Phhjcteuium, 125 

 PhoUdodadia, 149 

 Phyriospomiiti. 152 

 Phorm osellu , 123 

 I'hyUospongia, 153 

 Phymaplectia, 149 

 PhymateUa, 148 

 Physcaphwa, 148 

 physiology, 85 

 Pf/ochrota, 148 

 pinacocytes, 44, 62 

 pinulus, 117 

 Placonella, 149 

 Placoplegmo, 122 

 Placortis, 147 

 Placosponijifi, 148 

 Pl<i.cosiii'iif/id((e. 133, 145 



— diagnosis and genera, 148 

 P/acotrema, 124 

 PlakuKu 78. 82, 126-129, 



145, 147, 162 

 I'lakinastrdhi^ 147 

 Plakinidue, 162 

 — diagnosis and genera, 147 

 Plakinolophu, 147 

 planula, 82 

 Plasmodium, 41 

 Platychonia, 150 

 Plectispa, 152 

 Pledoderma, 123 

 Pledosimngiadae, 123 

 Pleroma, 149 

 Pleromidae, diagnosis and 



genera, 149 

 pleuralia, 118 



Pleurope, 124 

 Pleurostoma, 124 

 PlinihoseUa, 149 

 Plocamia, 152 

 Plocoscyphia, 124 

 plumicome, 117 

 Pliimohalidiondria, 1 52 

 plumose fibres, 140 

 PucUhni, 152 

 Poecillastra, 147 

 PoecUodadinidae, 149 

 Poecilosderidae, 138, 145 



— diagnosis and genera, 152 

 Polejaeti; 60, 100, 105, 109, 



142 

 Polejnu, 110 

 Poliop(Hjon, 7, 119, 123 

 PoUakidae, 123 

 polyaxon, spicules, 39, 132, 



134 

 Polyblastidmm, 125 

 Polyjerea, 149 

 Polylophus, 122 

 Polymastia, 151 

 Polymastiidae, diagnosis 



and genera, 151 

 Polysteganinae, 111 

 pores, 3, 27, 35, 85 



— formation of, 72 

 PorUeUa, 149 

 Porodionia, 124 

 Porocypdlia, 124 

 porocvtes, 27, 28. 48, 62, 



71,"'85, 108, 144 

 Porospongia, 124 

 Paroxpiiiiginae, 124 

 posterior granular cells, 69, 



71, 73 



— ray, 101, 105 

 Potamolepis, 152 

 Poterion, 151 

 Pozzidla, 152 



primary cell differentiation, 

 73 



— spicules. 40, 131 

 principal fibres, 141 

 jirincipalia, 119 

 J'ro2)hyscina, 154 

 prosodus, 35. 49. 127 

 prosopyles, 33, 48, 126, 127 

 prostalia, 118 

 Prosuberites, 151 

 PnitadiUleum, 150 

 Prnteleia, 138, 151 

 Proterospongia, 160 

 Protolynthus, 31, 161 

 J'riitospongui, 123, 157 

 I'rotospiingidae, 123 

 PriitnxyciiH, 111 

 protriaene, 133 

 Psammastra, 148 



Psammina, 154 

 Psamminidae, 142 



— diagnosis and genera, 

 154 



Psammodema, 154 

 Psammopemnia, 142, 154 

 pseudoderm, 95, 97, 104 

 pseudogaster, 23, 95, 116 

 pseudopodia, 71 



— in collencytes, 52 

 pseudopore, 95, 97 

 pseudosculum, 23, 95 

 pseudoskek'ton, 37 

 PseudosKberifes, 151 

 Purisijilionia, 124 

 Pycnopegma, 149 

 pylocyte, 48 

 Pyrgochonia, 150 

 Pyritonema, 123 

 Pytheas, 152 



quadriradiate spicules, 101 



— formation of, 107, 108 

 Quasilvm, 151 



RadieUa, 147 

 Racodiscula, 1 48 

 radial tubes, 96 

 radiate type of skeleton, 



135, 140 

 Radiolaiia, 43 

 Ragadinia, 149 

 Raphidonema, 111 

 RaphidojMus, 152 

 Raphisia, 151 

 Ruspailia, 153 

 Rauff, 109, 134, 165 

 Rautfia, 111 

 Receptacidifes, 123 

 Recejyfaculitidae, 123 

 Regadrdh, 6, 122 

 regul.ar tririidiates, 101 

 Reniera, 59, 67, 144, 151 

 Renierinae, diagnosis and 



genera, 151 

 Reuierine type of skeleton, 



140 

 Reniochalina, 151 

 reticulate type of skeleton, 



140. Ill" 

 Rh((bdasferi)ia, diagnosis 



and genera, 148 

 Rhahderemio, 152 

 rhabdi, 137 

 Rhahdocalypfus, 1 22 

 Rhohdoilidyitm, 122 

 rhabdome, 132, 163 

 Rhahdophddlo, 122 

 Rhabdosa, 149 

 rhabdus, 116, 133 



