614 



COMPARATIVE ANATOMY 



Parmophorus (Scutum), 5 



Patella, 72 ; nephridia, 218 ; nervous 



system, 138 ; section, 188 

 ,, rulyata, 4 



Patelluhtf, 5 

 Patinella, 108 

 Paxillae, 391, 503 

 Pecten, 17 ; eye, 174 

 ,, Jacobeus, 16 

 Pectinibranchia, 5 

 Pectinidce, 16 

 Pectinura, 300 

 Pectunculus, 15 ; eye, 175 

 Pedicellariae, 393-399 

 Pedicellaster, 299 

 PediceHasterid.ee, 299 

 Pedina, '290 

 Pedipes, 109 



Pelagothuria natatrix, 285, 286 

 Pelagothuriidce, 285 

 Pelanechinus, 290 

 Pelecypoda, 14 

 Pelmatozoa, 302-315 

 Peltastes, 290 

 Peltella palliolum, 9 

 Peltulti", 10 

 Pen (Ceph.), 69 

 Peneagone, 285 

 Pentaceros, 297 



turritus, oral skeleton, 473 



Pentactrnthhi', 296 

 Pentar.riitida, 313 

 Pentacrinus, 313 



decoms, 377 ; calyx, section, 



382 



Pentactcea, larva, 548 

 Pentactula, 516 

 Pentagonaster, 296 

 Pentagonasteridu; 296 

 PentephyUitm, 315 



Pentremites, 315, 314 ; ambulacrum, 

 section, 382 ; apical system, 330 ; 

 organisation, 380 

 Pentremitidce, 315 

 Pentremitidea, 315 

 Peraclis, 11 

 Periechocrinus, 307 

 Periostracum, 58 

 Periscoechinoidea, 289 

 Peristome, 339 

 Perna, 17 



Epliippinm, shell, 64 

 Peronella orbicularis, 424 

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

 Perradii, 316 

 Petalodium, 347 

 Petricula, 52 

 Petricolidce, 18 

 Phcenoschisma, 315 

 PJianerozonia, 296 

 P/iarus, 51, 115 

 Philine, 46 

 Philiiiid/i, 10 



Philonexidcc, 24 

 Philonexis, 24 



,, (Octopus) carence, hectocotylisa- 



tion, 243 

 Pholadacea, 19 

 Pholadidcc, 19 

 Pholadidea, 19 

 Ph./iladomyidce, 51 

 Pholas, 19 



dactylus, valve, 67 

 Phormosoma, 290 

 Phorus exutus, 5 

 Pliragmocoue, 68 

 Phyllidiidcc, 13 

 P/iyllirhoe, genital organs, 238 



,, buceplialum, 12 



Phyllirhida\ 13 

 PhylldbranchidcK, 12 

 Phyllodes, 347 

 Phylloplwrus, 287 



urna, 502 



Physa, 8 



fontinalis, 8 

 Physetocrinus, 307 

 Pinna, 17 



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

 I'ii-ni'i/stis, 336 

 Pisidium, 17 

 Pisocrinus, 304 

 Placobranchidce, 12 

 PlacopJwra, 2 

 Placuna, 15 



I'lii mi, i'ii!ir, S 



Planorbis, S, 58 



Plastidogenic organ, 445 



Plastron (Ecliiuoid.), 348 



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



340 ; primary, 340 

 Platycrinidce, 307 

 Platycrinus triacontadactylis, 308 

 fvberosus, tegmeu, 335 



Platydoris, 13 

 Plesiocidaroida, 289 

 Plesiospatangidce, 293 

 Pleura?, 182 

 Pleurobranchcea, 10 



Meckelii, genital organs, 



237 



Pleurdbranchia, 47 

 PlenrobraJichidce, 10 

 /'/I'l'i-n/irniic/iKs, 18 



,, auranttacus, 10 



1'1,'11,-n /i'/i,-/i/ie, 13 



'iifn, 13 



t , 13 



in, 5 ; shell, 59, 156 

 Pleurotomaridce, 5 



e, 6 

 'i, 125 



Pluteus, larva, 508, 509, 522 

 Plutonaster, 296 

 Pneumoderma, 11, 79 

 I'n: niii<itlermatid(e, 11 



