INDEX 



615 



Podocidaris, 290 

 Podocyst, 258 

 Polian vesicles, 416, 423 

 Polycera, 13 

 Polyplacophora, 2 

 Polytremaria, 5 ; shell, 59, 156 

 P&mpholyx solida, 160 

 Porcelainous layer of shell, 57 

 Porcellanaster, 296 

 Porcellanasterid.ee, 296 

 Pore rhombs (Cyst.), 384 

 Porocrinus, 313 

 Poromya, 51 

 Poromyidce, 21 

 Postpalmars (Grin.), 371 

 Poteriocrimis, 304 

 Pourtalesia, 295 



Je/reysi, 295 ; apical system, 



325 



Paurtalesiidce, 295 

 Prseputium, 235 

 Prismatic layer of shell, 57 . 

 Proboscidifera holostamata, 6 



siphonostomata, 6 



Promachocrinus, 313 

 Proneomenia, 3 



Sluiteri, 3 ; nervous system, 



132 ; sections, 42 



vagans, 184 



Proneonieniidce, 3 

 Proostracum, 68 

 Propodium, 106 



Prosobranchia, 4 '> gills* 90 5 heart, 199 ; 

 proboscis, 179 ; sections, 110 ; snout, 

 section, 181 ; tentacles, 102 

 Prosoplax, 64 

 Prostata, 233 



Protobranchia, 14 ', gills, 92 

 Protocrinus, 313 



oviformis, 312 



Prunocystis, 332 

 Pr;j,nnadetes, 293 

 PrynDiodesmia, 293 

 Paammobia, 18 

 Pxiiiiriiiobiidce, 18 

 Pseudarchaster, 296 

 Pseudoconch, 47 

 Pseudolamellibranchia, 15 

 Pseiidomelanidce, 6 

 Pseudomonocyclic Crinoids, 329 

 Psolus, 287 



ephippifer, 287 

 Psychropotes, 285 



lonyicavda, 285 



Psychropotidce, 285 

 Pteraster, 298 

 Pterasteridce, 298 

 Pterasterince, 503 

 Pterobranchia, 12 

 Pterocera, 107 

 Pteropoda, 10 ; larva, 257 

 gymnosomata, 11 

 thecosomata, 11 



Ptero&rachceidce, 6 

 Pterotrachea, 109 



auditory organ, 168 



(Firola) coronata, 7 



Ptychodera, 562 



aurantiaca, 585 



bahamensis, 585 



clavigera, 570 



,, erythrcea, 585 



minuta, 562 ; branchial region, 



section, 562 ; head region, 



section, 566, 568 ; ccelom, 



diagrams, 576 



Pulinonata, 8, 32 ; eye, 170 ; radula, 183 ; 



renal ducts, diagram, 75 

 Pupa, 8 

 Pupidce, 8 

 Purpura, 101 

 Purpuridce, 6 

 Pygaster, 291 

 Pygurus, 293 

 Pyramidellidce, 6 

 Pyriform vessel (Gastr.), 220 

 Pyrula, 44 



tuba, 73 

 Pythonaster, 298 



EACHIAL teeth, 182 



Rachiglossa, 6 



Radial shields, 362 



Radials, 318 



Radiolitidce, 18 



Radula, 177, 180-183 



Red-brown organ (Keber's organ), 215 



Regulares, 315 



Reptantia, 10 



Requienia, 18 



Metaster, 298 



Rete mirabile (Hoi.), 452 



Retiocrinidce, 306 



Retiocrinus, 306 



Rhabdopleura, 600-602 



Normani, 601 ; section, 



602 



Rhachiglossa, 6 

 Rhinophore, 48, 103 

 Rhipidocrinus, 306 

 Rhipidoglossa, 4 

 Rhizochilus, 183 

 Rhizocrinus, 311 



lofotensis, 335 ; axial canals, 



378 ; stone canal, 423 



Raivsoni, 335 



Rhodocrinidce, 306 

 Rhodocrinus, 306 

 Rhodope Veranii, 281 

 Rhopalodina, 287 



derivation of, 408 



Rimula, 43 

 Ringiculidce, 46 

 Rissoidce, 108 

 Rizzolia, 13 

 Rossia, 24 



