G40 



INDEX. 



Pleurodonts — Teeth, 551. 



Pleuroma — -'Generative organs, 293. 



Pleuropliyllidia — Branchia, 338. 



Plumatella — Alimentary canal, 160. 



Plnmnlaria — Colonies, 89. 



Pneumoderrnou — Respiratory organs, 339 ; 

 Olfactory organs, 352; Liver, 3G6; 

 Hermaphrodite glands, 382 ; Copu- 

 latory organ, 385. 



Poecilopoda — Development, 234 ; Abdo- 

 men, 235 ; Branchiae, 242 ; Liver, 

 275; Circulatory system, 282 ; Gene- 

 rative organs, 296. 



Podinema — Columella, 458. 



Podophthalma — Eye-stalk, 267. 



Podophrya — Nucleus, 89. 



Polyacanthus — Branchial lamella?, 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 ; 

 Ribs, 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; 

 Manns, 482; Hallux, 491; Cerebellum, 

 510 ; Pons Varolii, 510 ; Uvula, 549 ; 

 Stomach, 558 ; Venae cava?, 592 ; 

 Renal organs, 605 ; Penis, 623. 



Pristiurus — Ovaries, 64. 



Procyon — Dorso-lumbar vertebra 1 , 437. 



Proporus — Auditory organ, 156. 



Prorhynchus — Alimentary canal, 157. 



Prorodon — Contractile bands, 80 ; 

 Pharynx, 85. 



Prosimii - — Nipples, 422 ; Caca, 562, 

 Uterus, 616. 



Prosobranchiata — Epipodium, 324 ; Cere- 

 bral ganglia, 347 ; Ommatophor, 359 ; 

 Jaws, 360 ; Crop, 361 ; Salivary 

 glands, 364; Germ-glands, 385. 



Proteus— Vertebra?, 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; Conns arte- 

 riosus, 578. 



Protozoa — Review of, 75 ; Bibliography, 

 77 ; Supporting organs, 81 ; Inspira- 

 tion in, 85 ; Sensory organs, 86. 



Protrachcata — Enteric canal, 269; Tra- 

 cheae, 286; Generative organs, 296. 



Protula— Tentacles, 133. 



Pscudoneuroptera— Thorax,239;Gnathites, 

 245; Feet, 246; Ventral chord, 258; 

 Enteron, 272 ; Malpighian vessels, 

 277 ; Tracheal system, 289. 



Psittacida — 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 ; Radula, 

 360; Stomach, 362; Liver, 366; 

 Heart, 371 ; Vessels, 372 ; Generative 

 organs, 381 ; Hermaphrodite glands, 

 383 ; Receptaculum seminis, 384 ; 

 Copulatory organ, 385. 



Ptcrotrachea — Shell, 323; Sensory organs, 

 354; Ommatophor, 359; Recepta- 

 culum seminis, 385. 



Pterygota — Gnathites, 245; Ventral chord, 

 258 ; Trachea, 288. 



Fulex— 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; Trachea, 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 ; Langnets, 

 401; Branchial slits, 402; Sexual 

 organs, 407. 



Pyrula— Coeloni, 367. 



Radiolaria — Central capsule, 76, 82 ; 



Shells, 81 ; Skeleton, 82 ; Figure, 



82 ; Spores, 87. 

 Rana — Sternum, 442 ; Palato-quadrate, 



457 ; Shoulder-girdle, 476 ; Larvnx, 



569. 

 Raptores — Optic bulb, 529 ; Turbinate 



bone, 547 ; Stomach, 558. 

 Patita — Sternum, 443 ; Shoulder-girdle, 



476 ; Precoracoid, 476 ; Clavicle, 477 ; 



M. pyramidalis, 496; Lymphatic 



hearts, 599; Copulatory organs, 621. 

 Rays — Dermal denticles, 424; Articular 



processes, 437; Hyomandibular, 119; 



Shoulder-girdle, 474 ; Protoptery- 



gium, 478 ; Electric organs, 500 ; 



Vagus, 521; Gelatinous tubes, 524; 



Nasal groove, 526; Branchial clefts, 



543. 



