GIO 



INDEX. 



Pleuroclonts — Teeth, 551. 



Pleuroma — Generative organs, 293. 



Pleurophyllidia — Branchia?, 338. 



Plumatella — Alimentary canal, 160. 



Plumularia — Colonies, 89. 



Pneumodermon — Eespiratory organs, 339 ; 

 Olfactory organs, 352; Liver, 366; 

 Hermaphrodite glands, 382 ; Copu- 

 latory organ, 385. 



PcEcilopoda — Development, 23 1 ; Abdo- 

 men, 235 ; Branchiae, 242 ; Liver, 

 275 ; Circnlatory system, 282 ; Gene- 

 rative organs, 296. 



Podinema — Columella, 458. 



Podophthalma— Eye-stalk, 267. 



Podophrya — Nucleus, 89. 



Polyacanthus — Branchial lamellae, 544. 



Polycera — Vessels, 372. 



Polydesmus — Eenal concretions, 278. 



Polygordius — Cilia, 138 ; Muscular sys- 

 tem, 142 ; Cephalic pits, 153. 



Polymorphina — Shells, 81. 



Polypterus — Vertebral column, 429 ; 

 Bibs, 438; Brain, 505; External 

 gills, 545. 



Polyzoa— Skeleton, 82. 



Pontolimax — Branchiae, 339. 



Porifera — Ectoderm, 103; Skeleton, 105; 

 Sexual organs, 119. 



Porpita — Air-sac, 97. 



Priapulus — Alimentary canal, 161. 



Primates — Nipples, 422; Episternum, 444 

 Interparietal, 464; Turbinate bones 

 465; Tympanic, 466; Hyoid, 472 

 Manus, 482; Hallux, 491; Cerebellum 

 510; Pons Varolii, 510; U^-ula, 549 

 Stomach, 558 ; A''enae cavse, 592 

 Eenal organs, 605 ; Penis, 623. 



Pristiurus — Ovaries, 64. 



Procyon — Dorso-lumbar vertebrae, 437. 



Proporus — Auditory organ, 156. 



Prorhynchus — Alimentary canal, 157. 



Prorodon — Contractile bands, 80 ; 

 Pharynx, 85. 



Prosimii — Nipples, 422 ; Caeca, 562, 

 Uterus, 616. 



Prosobrancbiata — Epipodium, 324 ; Cere- 

 bral ganglia, 347 ; Ommatophor, 359 ; 

 Jaws, 360 ; Crop, 361 ; Salivaiy 

 glands, 364 ; Germ-glands, 385. 



Proteus — Vertebrae, 432 ; Thyroid gland, 

 554; Stomach, 557; Mid-gut, 561; 

 Larynx, 570 ; Lungs, 572 ; Blood, 

 corpuscles, 577 ; Auricle, 580. 



Protista • — Cilia, 39 ; Conjugation, 52 ; 

 Spores, 87. 



Protopterus — Fin, 477 ; External gills, 

 545 ; Air-bladders, 568 ; Conus arte- 

 riosus, 578. 



Protozoa — Eeview of, 75; Bibliography, 

 77 ; Supporting organs, 81 j Eespira- 

 tion in, 85 ; Sensory organs, 86. 



Protraeheata — Enteric canal, 269; Tra- 

 cheae, 286; Generative organs, 2G6. 



Protula— Tentacles, 133. 



Pseudoneuroptera— Thorax,239;Gnathites, 

 245; Feet, 246; Ventral chord, 258; 

 Enteron, 272 ; Malpighian vessels, 

 277 ; Tracheal system, 289. 



Psittacidae — Tongue, 551 ; Caeca, 562. 



Psolus — Ambulacra, 199. 



Pteraster — Arms, 196. 



Pterocera — Siphon, 323. 



Pteropoda— Velum, 322; Mantle, 322; 

 Foot, 323, 324; Shell, 332, Muscles, 

 343 ; Nervous system, 349 ; Buccal 

 ganglia, 351 ; Tentacles, 352 ; Olfac- 

 tory organs, 352 ; Auditory vesicles, 

 357 ; Alimentary canal, 358 ; Eadula, 

 360; Stomach, 362; Liver, 366; 

 Heart, 371 ; Vessels, 372 ; Generative 

 organs, 381 ; Hermaphrodite glands, 

 383 ; Eeceptaculum seminis, 384 ; 

 Copulatory organ, 385. 



Pterotrachea— Shell, 323; Sensory organs, 

 354 ; Ommatophor, 359 ; Eecepta- 

 culum seminis, 385. 



Pterygota — Gnathites, 245; Ventral chord, 

 258 ; Tracheaj, 288. 



Pulex — Ventral chord, 259. 



Pulmonata — Shell, 332 ; Salivary glands, 

 364 ; Excretory organs, 377 ; Herma- 

 phrodite glands, 383. 



Pupipara — Ventral chord, 259. 



Purpura — Dermal glands, 329 ; Anal 

 glands, 362. 



Pycnogonida — Nervous system, 256; Eyes, 

 266; Caeca, 269; Circulatory system, 

 284; Tracheae, 291; Generative 

 organs, 299. 



Python— Skull, 460; Larynx, 569; Veins, 

 591 ; Copulatory organs, 621. 



Pyrosoma — Stolo prolifer, 396 ; Lumi- 

 nous organs, 294 ; Muscular system, 

 395; Nervous system, 396; Languets, 

 401 ; Branchial slits, 402 ; Sexual 

 organs, 407. 



Pyrula— Coelom, 367. 



Eadiolaria — Central capsule, 76, 82 ; 



Shells, 81; Skeleton, 82; Figure, 



82 ; Spores, 87. 

 Eana — Sternum, 442 ; Palato-quadrate,' 



457; Shoulder-girdle, 476; Larvnx, 



569. 

 Eaptores — Optic bulb, 529 ; Turbinate 



bone, 547; Stomach, 558. 

 Eatitfe — Sternum, 443 ; Shoulder-girdle, 



476; Precoracoid, 476; Clavicle, 477; 



M. pyramidalis, 496 ; Lymphatic 



hearts, 599; Copulatory organs, 621. 

 Bays — Dermal denticles, 424 ; Articular 



processes, 437; Hyomandibular, 449; 



Shoulder-girdle, 474 ; Protoptery- 



gium, 478 ; Electric organs, 500 ; 



Vagus, 521; Gelatinous tubes, 524; 



Nasal groove, 526; Branchial clefts, 



543. 



