38(3 



Oliva. :!'2S 

 01i\-e shells, 328 

 Olivella, 329 

 Olivida-. :a8 

 Olvnthoidea, 02 

 Oiiniuistici.liul*, o75 

 OimiKistivi'lics, o76 

 Oiicliid.-lla. ::o!i 

 (),i,-!ii. lii.hr, :;(«! 

 OiH'lii'liiiiii. :;ii'.i 



Onciiiciniis, ;;m 



Oniscia, :i5'2 

 Onychoteutliis, 375 

 Opalina, 41 

 Oiiercularia, 45 

 Operculum, "288 

 OiihiacaiitUa, 151 

 Ophiactis. 150 

 Ophitlaster, 159 

 Opliidomonas, 33 

 Opliiobyrsa, 152 

 Ophiocerauiis, 149 

 Opliiociasuia, 152 

 Opliiocoma, 151 

 Opliiocniila, 150 

 Ophioci'eas, 152 

 Opliiocteu, 149 

 Ophiooviubium,151 

 Ophioulviilia, 149 

 Opliioiiclus, V<-1 

 Ophioiuitra, 151 

 Oi.liio,„„siun,. 149 

 (,,,l,i,.nn.- 1.-.2 

 !l|,h..m,vxa. 1..2 

 (lphl..lirll:l, 1:. 

 C>i.ln..i.lH.lis, 150 

 (ll.lilMll.rix, I.M 

 Opl.iozona. Il'.i 

 Opliiuia, UU 

 OphiuiuUe, 148 

 Ophiuroklea, 147 

 OplirydiiiiE, 43 

 Ophrydium, 27, 45 

 Oplir'yocotyle, 201 

 Ophyomyces, 152 

 Opisthobranchiata, 295 

 Orbiculiua, 10 

 Orbitolites, IG 

 Orbulina, 20 

 Oreaster, 15i) 

 Organic bodies, ii 

 Organ-pipe coral, 123 

 Organs, xiii 



Organs, correlation of, xiv 

 Organs o{ Bojauus, 251 

 Ormers, 320 

 Oi-thidaj, 247 

 Orthoceras, 368 

 Ostrea, 257 

 Ostreidai, 257 

 Ostrich plume, 86 

 Otina, 307 

 Otocysts, XXX, 84 

 Otoliths, XXX 

 Ovuluni, 349 

 Oxygyrus, 355 

 Oxyuris, 212 

 Oyster, 257 

 ■ „ pearl, 262 

 „ thorny, 262 



Pachybatron, 352 

 Pachydrilus, 223 

 Pachvtrocha, 45 

 Pallets, 283 

 Pallial chamber, 288 

 Pallial Hue, 256 

 Pallial sinus, 257 

 Pallium, 240 

 PaludicellidiB, 241 



INDEX. 



Paludina, 340 

 PaludinidiE, 340 

 Palythoa, 69 

 Pandora, 282 

 Panopsea, 281 

 Pantostomata, 32 

 Paper nautilus, 370 

 Paper sailor, 370 

 Paphia, 280 

 Parallelipedum, 268 

 ParamecidiE, 39 

 Paramecium, 28, 39 

 Parapodia, 219 

 Parasira. 370 

 Partvila. :'>15 

 Parthenogenesis, xlviii 

 Parypha, SO 

 Patella. 320 

 Patellida;, 320 

 Patiria, 159 

 Peachia, 116 

 Peacock tail volute, 327 

 Pear-shells, 352 

 Pear-snail, 332 



Pearl oyster, 262 



Pearly nautilus, 368 



Pecten, 261 



Pectinaria, 228 



Pectinatella, 244 



PectinidsE, 260 



Pectinura, 149 



Pectunoulus, 269 



153 



lV<l;it:l. ISO 



I I'rdirrllilKi, -:■'■> 

 PediccUinida, 239 

 Pedipes, 306 

 Pelagia, 92 

 Pelagidse, 92 

 Pelecynoda, 252 

 Pelican's-foot shell, Sol 

 Pclodera. 207 

 Peueropolis, 16 

 Pennaria, 80 

 Pennatula, 123 

 PennatulidEe, 123 

 Pentaceros, 159 

 Pentacrinus, 142 

 Pentacta, 181 

 Prntiviiiites, 139 

 I r,.|>'l.;i't:'. --2 

 I'rrMiiii.hr. :;s 



divlhi 



, 176 



IViiidiyllida'. 94 



Peviploina, 282 



Perisarc,77 



Peritricha, 43 



Perivisceral space, xx 



Periwinkles, 338 



Perna, 266 



Peronia, 309 



Person, 57 



Perspective shell, 326 



Petalosticha, 172 



Petricola, 277 



Petricolidfe, 277 

 Petrified fingers, 373 

 Phalansterium, 35 

 I'liaretrones, 63 

 riuis<-..li.s..iiia, 217 

 I'hasiunfll-,,. 323 

 I'lieasant shells, 323 

 I'hercmema. 71 

 Pliilinida-. :;02 

 Philonexid.-c, 369 

 Phileus. 162 

 Pboladidea, 286 

 PholadinBe, 283 



Pholas, 285 

 Phormosoma, 168 

 Phoronis, 218 

 Phorus, 32(i 

 Phosphorax, 319 

 Pliragmocoue, 373 

 Phreoryctes, 223 

 Phreoryctidae, 222 

 Phylactolfemata, 243 

 Phyllacanthus. 166 

 PhyllididfE, 298 

 Phyllirhoe, 300 

 Phyllirboidte, 300 

 Phyllodoce, 229 

 Physa, 308 

 Physalia, 104 

 Physemaria, 61 

 Physiology, xviii 



Physophora, 102 



Physophorte, 98 



PhysophoridiE, 102 



Pilgrim's shells, 261 



PilTdium. 217 



Pin-worm, 212 



Pinna, 87, 267 



Pisidium, 275 



Placuna, 260 



Planaria, 188 



Planovbina;, 307 



Planorbis, 308 



Plant, ill 



Plants and animals, differences 

 between, iii 



Planula, 78 ■ 



Plastidules, 4 



Plathelminthia, 187 



Platycola, 33, 45 



Platycrinus, 146 



Platytheca, 33 



Pleuvohrachia, 111 

 Plenn.l.nni.lnda-, 303 



, i03 

 ■al cavity, xii 



l-.ihr; 



Pli 



Pic 

 Pl< 



Plruroti 



Pleurot. 

 PhunaK 

 PI" 

 Pill 



a. :i37 

 .,rid:T?, 323 

 i&.y. 337 





Podo 



fiidiou-e, 104 

 ,„l,.iin.m. 360 

 ...Irniionida', 360 

 ,,|.h..ra. ISO 



..nis, 12 



Podophrya, 47 



Podophryie, 47 



Podostoma, 32 



Podostomata, 244 



Polar globule xlv 



Polia. 216 



P<.lian vescicle, 137 



P,.hr,dis, ISII 

 l'.,rv.vva. :;"0 



l>„Iye.M ida., :;iX) 

 Polycha'ta, 22;) 

 Polycirrus, 235 

 Polvcloni 

 Polvcvsti 

 Polvdnra. 22, 

 Pi.lvuastri.aj; 

 p„lV-..i<li"s, 219 

 P.ilvkrik.'S. -10 

 l',.lvniastiua, :'.2 

 l'„lvn,ondi.sn,,49 

 P..rva'.-i, ::.- 

 INdvi's, 112 

 T,.lM,st.-ni.99 

 Polyp.drs, 2:'.7 

 Polvpites, 100 

 I Polyplacophora, 293 



s, 11 



