INDEX, 



639 



Os— Manns, 483. 



Oxyaris — Alimentary canal, 159. 



Pagarus — Ventral chord, 254; Male organs, 

 295. 



Palinurus — Ventral chord, 254; Liver, 275. 



Palaeotlierium — Manus, 4S3. 



Paludicella — Alimentary canal, 169. 



Paludina — Nervous system, 348 ; Figure, 

 371 ; Albumiuiparous gland, 385 ; 

 Penis, 386. 



Pandora — Generative organs, 381. 



Pauorpa — Masticatory stomach, 272. 



Paradoxurus — Dorso-lumbar vertebrae, 

 437. 



Paramoecium — Trichocyst, 79 ; Pharynx, 

 85 ; Figure, 85 ; Contractile vesicles 

 86. 



Passeres — Stomach, 558. 



Patella— Branchise, 337; Radula, 360; 

 Excretory organs, 377 ; Germ-glands, 

 385. 



Pecten — Byssus gland, 329 ; Branchiee, 

 337; Muscles, 343; Ganglia, 346; 

 Tentacles, 352 ; Visual organs, 353 ; 

 Organ of Bojanus, 376 ; Generative 

 organs, 381. 



Pectinaria — Branchial tentacles, 135. 



Pedicellina — Tentacles, 134; Nervous 

 system, 146. 



Pelagia— Larvae, 99 ; Marginal filaments, 

 102 ; Marginal vesicles, 110. 



Pelobates — Vertebrse, 432 ; Tympanic 

 cavity, 537- 



Penelopidse — Copnlatory organs, 621. 



Pennaria — -Buds, 95. 



Pennatulida — Skeleton, 106 ; Generative 

 organs, 123, 



Pentacrinus — Ambulacral groove, 204. 



Pentacta — Cuvierian organs, 216. 



Pentastomum — Generative organs, 298. 



Perameles — Tympanic bone, 466. 



Perennibranchiata — Branchial arches, 

 471 ; Muscles of branchial skeleton, 

 497; Eyelids, 532; External gills, 

 545; Lungs, 572; Cephalic arteries, 

 586. 



Peripatus — Form of, 237; Appendages, 

 238, 244 ; Spinning glands, 250; Mus- 

 cular system, 251 ; Nervous do., 255 ; 

 Enteric canal, 270 ; Salivary glands, 

 273 ; Circulatory system, 283 ; Tra- 

 chefe, 286. 



Perisossodactyla— Nipples, 422 ; Dorso- 

 lumbar vertebrae, 436 ; Manus, 483 ; 

 Pelvis, 486 ; Third trochanter, 490. 



Peritricha — Cilia, 79. 



Perlida— Tracheal gills, 247, 289 ; Ec- 

 dysis, 289. 



Petalosticha — Ambulacra, 199. 



Petaurista — Tympanic bone, 466. 



Petromyzon — -Auditory capsule, 448; Ol- 

 factory organ, 525 ; Ear, 533 ; Respi- 

 ratory organs, 542 ; Aorta, 585. 



Phalangium — Geuei-ative organs, 298. 



Phallusia — Mantle, 394. 



Pharyngobranchiata — Branchial arches, 

 470. 



Phascolomys — Turbinate bones, 547. 



Phascolosoma — Alimentary canal, 161. 



Pheruseidae — Branchial tentacles, 135. 



Phoca — Turbinate bones, 547 ; Stomach, 

 558 ; Pancreas Aselli, 600. 



Pholas — Nervous system, 345. 



Phronima — Optic nerves, 253; Heart, 280. 



Phryganida— Tracheal gills, 247, 273. 



Phrynida — Gnathites, 244 ; Nervous 

 system, 256 ; Eyes, 265 ; Enteric 

 canal, 269 ; Lungs, 291. 



Phylactolaoma — Muscular system, 144. 



Phyllodoce— Visceral nerves, 187; Pro- 

 boscis, 163. 



Phyllopoda — Shell, 235; Appendages, 

 238 ; Ventral chord, 254 ; Eyes, 265 ; 

 Liver, 275 ; Heart, 280. 



Phyllosoma — Liver, 275; Germ-glands, 

 294. 



Physemaria — Ectoderm, 103. 



Physoklisti — Air-bladder, 567. 



Physophoridae — Nectocalyces, 96 ; Air- 

 sac, 97 ; Generative organs, 121. 



Phvsostomi — Caudal region, 431 ; Ribs, 

 438 ; Air-bladder, 567- 



Pinna — Visceral ganglia, 346 ; Visual 

 organ, 353; Renal ducts, 376; Genital 

 canal, 381. 



Pinnipedia — Auditory meatus, 539 ; 

 Buccal glands, 553 ; Thymus, 600 ; 

 Renal organs, 605. 



Pipa — Sacrum, 433; Atlas, 437; Eusta- 

 chian tube, 537 ; Tongue, 551. 



Piscicola — Vascular system, 167 ; Gene- 

 rative organs, 184. 



Placentalia — Foramen ovale, 584. 



Placophora — Groove, 318; foot, 321; 

 Tentacles, 326 ; Spicules, 330 ; Bran- 

 chias, 336, 337 ; Nervous system, 

 344; Liver, 365; Auricles, 369; 

 Excretory organs, 375 ; Generative 

 organs, 380. 



Planaria — Tentacles, 132; Liver, 165; 

 Coelom, 165 ; Excretory organs, 177 ; 

 Genital pore, 184. 



Planorbidae— Lung, 339 ; Crop, 361. 



Planorbis— Blood-fluid, 375. 



Platyhelminthes— Form, 129 ; Month, 129 ; 

 Integument, 136; Dermal glands, 

 141 ; Muscular system, 142 ; Mus- 

 cular fibres, 144; Nervous system, 

 145 ; Sexual organs, 184 ; Alimentary 

 canal, 157; Liver, 165; Excretory 

 organs, 175 ; Generative organs, 179. 



Platyrhini — Turbinate bones, 547. 



Plectognathi — Bony plates, 42 1. 



Pleione — Origin of nerves, 151. 



Pleurobranchus — Jaws, 360 ; Salivary 

 . glands, 364; Vessels, 372 ; Recepta- 

 culum seminis, 384. 



