342 



INDEX 



Phytocrinus, 195 

 Pictet, F. J., 40 

 Picteticrinus, 182 

 Pileus, 316, 320 

 Pilocystis, 46 

 Pinnata(P.H. Carp.), 140; 



(Bather), 191 

 pinmilae, 113 

 Pionocrinus, 166 

 Pirocystis, 47 

 Pisocrinus, 149 

 Placocystis, 51 

 Placodiadema, 309 

 plastidogen organ, 23 

 Platasterias, 252 

 Platybrissus, 322 

 Platyceras, 157 

 Platycrinus, 157 

 Platycystis, 51 

 Platysphaerites, 203 

 Plectaster, 258 

 Plesianthus, 318 

 Plesiocidaroida, 305 

 Plesiolampas, 321 

 Pleurechinus, 312 

 Pleurocrinus, 157 

 Pleurocystis, 64 

 Pleurodiadema, 309 

 plexiform gland, 23 

 Plicatocrinus, 153 

 Pliny, 218 

 Plistophyma, 309 

 Plumaster, 259 

 Pluteus, 6, 16 ; (Oph.), 273 

 Plutonaster, 251 

 Pneumophora, 226 

 Podasterias, 258 

 podia, 1, 2; (Ast.), 243; 



(Ech.), 291 

 Podocidaris, 308 

 Polian vesicles, 27 ; (Ast. ), 



243 ; (Ech.), 291 

 Polyasterias, 258 

 Polycerus, 182 

 Polycidaris, 302 

 polycyclic spine, 287 

 Polycyphus, 310 

 Polypeltes, 162 

 Polypholis, 278 

 Pomatocrinus, 191 

 Pomel, A., 284 

 Pomocystis, 72 

 Pomonites, 72 

 Pomosphaera, 72 

 Pontaster, 251 

 Porania, 254 

 Poraniomorpha, 254 

 Porcdlanaster, 251 

 pore canal, 8 



plate, 80 



rhombs, 42 



pores, ambulacral (Ech.), 

 287 



of Blastoids, 86 

 Porocrinus (Bill.), 172 



(Dittm.), 182 

 postpalmaria, 204 

 Poteriocrinacea, 171 

 Poteriocrinidae (W. & Sp.), 



171 



Poteriocrinus, 180 

 Pourtalesia, 323 

 Pradocrinus, 168 

 Prenaster, 323 

 pre-oral lobe, 4, 8 

 primary skeletal elements, 



109 



primaxil, 114 

 primibrachs, 114 

 primitive suture, 108 

 Proclivocrinus, 148 

 Prognaster, 255 

 Promachocrinus, 195 

 Protaster, 274 

 Protasteracanthion, 251 

 Proteocystis, 73 

 Proteroblastus, 74 

 Proieurycde, 203 

 Protoblastoidea, 79 

 Protocrinus, 74 

 Protocyamus, 316 

 Protocystis, 48 

 Prouho, H., 245, 285, 288 

 proximal (Crin.'), 109 

 proximal e, 108 

 Prunocystis, 60 

 Prymnadetiuae, 322 

 Prymnodesminae, 323 

 Psammechimis, 313 

 pseudambulacra(Cyst.),43 ; 



(Blast.), 78 

 Pseudarcliaster, 251 

 Pseudaster, 251 

 pseudhaemal ring, 102 



system, 25 ; (Ast), 243 ; 

 (Ech.), 292 



Pseudoboletia, 313 

 Pseudocatopygus, 321 

 Pseudocrinus, 62 

 Pseudocucumis, 230 

 Pseudodesordla, 321 

 Pseiidodiadema, 309 

 pseudo-heart, 23 

 pseudomonocyclic, 111 

 pseudo-pedicellariae, 247 

 Pseudopedina, 309 

 Pseudostichopus, 227 

 Psilaster, 252 

 Psolidium, 230 

 Psofes, 230 

 Psychropotes, 229 

 i Psychrotrephes, 229 



Pteroconia, 203 

 Pterotocrinus, 159 

 Ptilonaster, 274 

 Ptychocrinus, 198 

 Pupa, 5 

 Pycnaster, 253 

 Pycnocrinus, 161 

 Pycnopodia, 258 

 Pycnosaccus, 187 

 Pygaster, 316 

 Pygastrides, 316 

 Pygaulus, 320 

 Pygorhynchus, 321 

 Pygorhytis, 321 

 Pygospatangus, 323 

 Pygurost&ma, 321 

 Pygurus, 321 

 pyramids (Ech.), 289 

 /Vi"a, 320 



Pyrocystis. See Pirocystis 

 Pythonaster, 257 

 Pyxidocrinus, 168 



radial canals, 243. See 

 also perradial 



dome-plates, 127 



facet, 100 



pseudhaemal caiial, 100 



shields, 264 



sinus, 84 

 vesicles, 27 



radialia, radials (Crin.), 99, 

 204; (Ast.), 246; (Ech.), 

 294; (Oph.), 268 



radianal, 112, 119 



Radiaster, 254 



Radiata, 2 



radical cirri, 107 



Radiocyphus, 312 



radix, 99 



rami, 113 



ramuli, 113 



rectal caeca, 243 



recumbent arms, 43, 65 



Regulares (Blast.), 91 



Regularia (Crin.), 139 



Ectobranchiata, 306 



Endobranchiata, 300 

 Remaster, 256 

 respiratory trees, 27, 222 

 Retaster, 257 



rete mirabile, 223 

 Reteocrinus, 198 

 Rhdbdocidaris, 302 

 Rhabdopleurus, 312 

 Rhadinocrinus, 179 

 Rhaphanocrinus, 200 

 Rkegaster, 254 

 Rhinobrisms, 323 

 Rhipidaster, 256 

 Rhipidocrinvs, 201 



