614 



GOMPABATIVE ANATOMY 



Pannoplwrus {Scutum), 5 

 Fcdella, 72 ; iiephridia, 218 ; nervous 

 system, 138 ; section, 188 

 ., vulgata, 4 



Patellida; 5 

 Patiiidla, 108 

 PaxiUsE, 391, 503 

 Peeten, 17 ; eye, 174 

 „ Jacoheus, 16 

 Pect-inihrancMa, 5 

 Periinldm, 16 

 Pn-tiiivra, 300 

 Pcrtiinrii/ii.t, 15 ; eye, 175 

 Pedicellarire, 393-399 

 PaHceUasle,; JHO 

 PeiUcella.-itnidcr, J90 

 Pedina, S90 

 Pedipes, 109 



Pelagothii ria natatrix, ,3S5, 286 

 Pdagotkuriida', 2S5 

 Pi'lmiechinus, 290 

 Pelecijp"(la, IJf 

 I'ebnatnzna, 302-315 

 Prlfusfcx, 290 



ppltdla palliolum, 9 

 Peltidw, 10 

 Pen (Cepli.), 69 

 Peneafjoitc, 2S5 



Pntacero.-:, 297 



turrififs, oral skeleton, 473 



Pe nt tree n>( idee, 296 



Penteterinidee, 313 



Pentcicrinus, 313 



„ deenrus, 377 ; calyx, section, 



382 



Penteccta^a, larva, 548 



Penteietidii, 516 



Petttagunaster, 206 



Pe idagonrLsteridte, 296 



Pentephyllum, 315 



Pentreiiutes, 315, 314 ; ambulacrum, 

 section, 382 ; apical system, 330 ; 

 organisation, 380 



Pentremitidee, 315 



Pentreiiidlileo., 315 



Penidis, 11 



Periechverinus, 307 



Periostracum, 58 



Periscoechinoidea, 289 



Peristome, 339 



Perna, 17 



,, liphippimn, shell, 64 



Peronella nrhieideiris, 424 



Peronia (Moll.), 45 ; (Ech.), 290 



Perradii, 316 



Petalodium, 347 



Pdrieirhi.. 52 



PdrieiiUdie, IS 



PheenoscMsnm, 315 



Phanericj'iiiei., 296 



p]iarus, 51, 115 



Plidine, 46 



Philinidce, to 



Philoiiexidee, 2Ii. 

 Phileytiexis, 24- 



„ (Odopus) carence, hectocotylisa- 



tion, 243 

 Pholadacea, 19 

 Plwladidce, 19 

 Pholadidea, 19 

 Pholadoinyidce, 51 

 Plwlas, 19 



,, dadylus, valve, 67 

 Phormejsoiiia, 290 

 PhoruM exiftus, 5 

 Pliragmocone, 68 

 Phyllidiidee, 13 

 Phyllirlio'i, genital organs, 238 



„ biixephaluin, 12 



Phyllirlimdee, 13 

 Phyllobmndiidcc, 12 

 Phyllodes, 347 

 Phyllophorus, 2S7 



,, urna, 502 



Physa, S 



„ funtincdis, 8 

 Physetocri'ims, 307 

 Pinna, 17 



Pinnules (Grin.), 371 ; (Blast.), 381 

 Piracy stis, 336 

 Pisidii'm, 17 

 Pisocrinus, 304 

 Placohrci'iicMdai, 12 

 Pleieopkoret, 2 

 Placuna, 15 

 Planaxidce, 8 

 PluneirMs, 5, 58 

 Plastidogenic organ, 445 

 Plastron (Ecliinoid.), 348 

 Plates, included, 340 ; isolated, 340 ; half, 



340 ; primary, 340 

 PlatycrinideE, 307 

 Platycrinus triacontadactylis^ 308 

 tidxrosus, tegmen, 335 

 Platyderris, 13 

 Plesiocidaroida, 2S9 

 Plesiu-ynUernijidee, 293 

 Pleura, 182 

 PleuTohrandicEa, 10 



„ MecA'eiii, genital organs, 



237 

 Pleurobrcoichia, 47 

 Pleurobrmichidce, 10 

 Pleurobrayichii s, 18 



,, aiiremtieieus, 10 



PleuriJeuridce, 13 

 XHeurophyllidia lineata, 13 

 PleuTophyllidiidce, 13 

 PleuTotoinaria, 5 ; shell, 59, 156 

 Pleurotomaridce, 5 

 Pleurotomidce, 6 

 Pliodon Spekei, 125 

 Pltitevs, larva, 608, 509, 522 

 Plutonaster, 296 

 Pneumoderma, 11, 79 

 P?ieumodermatida', 11 



