INDEX 



615 



Podocidaris, 290 

 Podocyst, 258 

 Polian vesicles, 416, 423 

 Polycera, 13 

 Pdhjplacophora, 3 

 Poli/tremaria, 5 ; shell, 59, 156 

 Pumphulyx solida, 160 

 Porcelain ous layer of shell, 57 

 Porcellanaster, 296 

 PorceUanasteridce, 296 

 Pore rhombs (Cyst.), 384 

 Piimcrimis, 313 

 Pitriuiuja, 51 

 Poromyidce, 21 

 Postpalmars (Crin.)» 371 

 Poteriocrinus, 304 

 Pourtcdesia, 295 



„ Jeffreysi, 295 ; apical system, 



325 

 Pourtalesiidce, 295 

 Prsepiitium, 235 

 Prismatic layer of shell, 57 

 Prohoscidifera holostomata, 6 



,, sipJwnostomata, 6 



Prcmuichocrinus, 313 

 Proneomenia, 3 



„ Sluiteri, 3 ; nervous system, 



132 ; sections, 42 

 ,, vagans, 184 



Proneomeniidce, 3 

 Proostracum, 68 

 Propodium, 106 

 Prosobranchia, 4 ; giUs. 90 ; heart, 199 ; 



proboscis, 179 ; sections, 110 ; snout, 



section, 181 ; tentacles, 102 

 Prosoplax, 64 

 Prostata, 233 



Protobraiichia, 14 ; gills, 92 

 Protocrinus, 313 



„ oviformis, 312 



Prunocystis, 332 

 Prymnnddes, 293 

 Pniiiiiin,l,'swia, 293 



J'sai,n,lnhia, IS 



Psamviobiidce, 18 

 Pseudarchaster, 296 

 Pseudoconch, 47 

 Pseudolamellihranchia, 15 

 Pseudomelanidce, 6 

 Pseudomonocyclic Crinoids, 329 

 Psohis, 287 



„ ephippifer, 287 

 Psychropotes, 285 



„ longicauda, 285 



PsychropotidcB, 285 

 Pteraster, 298 

 Pterasteridce, 298 

 Pterasterince, 503 

 Pterobranchia, 12 

 Pterocera, 107 

 Pteropoda, 10 ; larva, 257 



,, gymnosomata, 11 



,, thecosomata, 11 



PterotrrachcBidoe, 6 

 Pterotrachea, 109 



„ auditory organ, 168 



„ {Firola) coronata, 7 



Ptychodera, 562 



(iwrantiaca, 585 

 ,, bahamensis, 585 



„ clavigera, 570 



., erythrcea, 585 



„ minuta, 562 ; branchial region, 



section, 562 ; head region, 

 section, 566, 568 ; coelom, 

 diagrams, 576 

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



renal ducts, diagram, 75 

 Pupa, 8 

 Pupidce, 8 

 Purpura, 101 

 Purrpuridce, 6 

 Pygaster, 291 

 Pygurus, 293 

 Pyramidellidai, 6 

 Pyriforni vessel (Gastr.), 220 

 Pyrula, 44 



„ tuba, 73 

 Pythonaster, 298 



Rachial teeth, 182 



Rachiglossa, 6 



Radial shields, 362 



Radials, 318 



Radiolitidce, 18 



Radula, 177, 180-183 



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



Regulares, 315 



Reptaiitia, 10 



Requienia, 18 



Retaster, 298 



Rete mirabile (Hoi.), 452 



Rdi.n:ni,ldw, 306 



Rdinrnin-^, 306 



Rlucbduplcara, 600-602 



„ Normani, 601 ; section, 



602 

 Rhachiglossa, 6 

 Rhinophore, 48, 103 

 RhipidocrtMus, 306 

 Rhipidoglossa, 4 

 Rhizochilus, 183 

 Rhizoerinus, 311 



„ lofotensis, 335 ; axial canals, 



378 ; stone canal, 423 



„ Rawsoni, 335 



Rhodocrmidce, 306 

 Rhodocrinus, 306 

 Rlwdope Veranii, 281 

 Rlwpalodina, 287 



„ derivation of, 408 



Rimula, 43 

 Ringiculida, 46 

 Rissoidce, 108 

 Rizzolia, 13 

 Rossia, 24 



