INDEX 



459 



Plutonaster, 55, 63 

 Podocidaris, 290 

 Poliometra, 26, 32 

 Pohjpholis, 204 

 Pontaster, 71 

 Porania, 90 

 Poraniidae, 76, 89 

 Poraniomorpha, 90, 92 

 Porcellanaster, 52 

 Porcellanasteridae, 51 

 Poriocidaris, 270, 273 

 Porocidaris, 273 

 Pourtalesia, 343, 440 

 Pourtalesiidse, 340, 343, 344 

 Prognaster, 131 

 Prospatangus, 327 

 Protankyra, 425, 426 

 Psammechinus, 294 

 Pseiidarchaster, 79, 86 

 Pseudarchasterinse, 78, 86 

 Pseudaster, 52 

 Pseudocucumis, 409 

 Pseudostichopus, 378, 386 

 Psilaster, 56, 59 

 Psilasteropsis, 64 

 Psolidse, 395, 413 

 Psolidium, 413 

 Psolinus, 396 

 Psolus, 414 



Psychropotes, 373, 375 

 Psychropotidae, 360, 372 

 Pteraster, 102 

 Pterasteridae, 95, 101 

 Ptilocrinus, 15 

 Puddings, 399 

 Pygastrides, 268 

 Pyrenaster, 83 



Radiaster, 96 

 Radiasteridae, 95, 96 

 Regular Echinoids, 267 

 Regularia, 267 

 Retaster, 101 

 Rhabdomolgus, 426, 436 

 Rhegaster, 92 

 Rhizocrinus, 17, 18 



Salenia, 289 

 Saleniidae, 288, 289 

 Salenocidaris, 289 

 Sarkaster, 116 

 Schizaster, 323 

 Sclerasterias, 138 

 Scotoanassa, 366, 368 

 Scotoplanes, 368 

 Sea-cucLunbers, 9, 10, 350 

 Sea-lilies, 9, 10 



Sea-stars, 10, 41 

 Sea-urchins, 10, 254 

 Semperia, 396 

 Solaster, 111 

 Solasteridee, 96, 111 

 Spatangidse, 321, 326 

 Spatangoidea, 268, 319 

 Spatangus, 327 

 Sperosoma, 279, 286 

 Sphaerechinus, 309 

 Sphaeriodiscus, 79 

 Sph^rothiu-ia, 395, 396 

 Spinulosa, 49, 94 

 Starfishes, 41 

 Stephanaster, 79 

 Stereocidaris, 270 

 Stichaster, 136 

 Stichasteridae, 122, 133 

 Stichastrella, 133, 134, 135 

 Stichopodidae, 377, 389 

 Stichopus, 389 

 Stiremetra, 25 

 Stirodonta, 276, 288 

 Stolasterias, 138 

 Streptophiurce, 155, 164 

 Strongylocentrotidae, 292, 311 

 Strongylocentrotus, 311 

 Stylasierias, 138 

 Stylocidaris, 270, 271 

 Styracaster, 52 

 Synallactes, 378 

 Synallactidae, 377 

 Synapta, 427 

 Synaptidae, 424 

 Synaptinae, 424 

 Synaptula, 425 



Teninechininae, 292 

 Temnechinus, 292 

 Temnopleuridte, 291, 292 

 Temnopleurinae, 292 

 Tethyaster, 54, 55 

 Thalassometra, 25 

 Thalassometridae, 16, 25 

 Thaumatocrinus, 23 

 Thaumatometra, 26, 27 

 Thoracaster, 52 

 Thunderstones, 9 

 Thvone, 396, 405 

 Thyonidium, 409, 411 

 Tosia, 81 

 Toxopneustes, 306 

 Toxopneustida3, 291, 309 

 Trepang, 9 

 Trichasteridae, 157 

 Trichometra, 26, 37 

 Triconus, 374 



