960 



INDEX 



Panopaea, 467. 

 Panorpata, 406. 

 Pantopoda, 431. 

 Papillary muscles, 806. 

 Papio, 885. 



Parachordals of skull, 533. 

 Paractinopoda, 310. 

 Paradise-fish, 628. 

 Paraglossae, 372. 

 Paramcecium, 116, 117, I39- 



— conjugation of, 118. 

 Paraperipatus, 366. 

 Parapodia, 266, 266. 



Parasites, disease-producing, 145-150. 



— important human, 242. 

 Parasitic fauna 900. 

 Parasitism of Acarina, 422. 



— of Amoebae, 145. 



— of Cestoda, 223. 



— of Cirripedia, 346, 347. 



— of Copepoda, 342. 



— of Crustacea, 354, 356, 359. 



— of Gasteropods, 476. 



— of Insects, 404. 



— of Nematoda, 239. 



— of Pentastomum, 424. 



— of Trematoda, 218, 220. 

 Parasphenoid, 619, 654 

 Parasuchus, 717. 

 Parathyroids, 570. 

 Parazoa, 166. 

 Pareiosaurus, 720. 



Parental care in Amphibians, 682. 



in Asteroids, 297. 



in Birds, 760. 



-in crocodiles, 716. 



in Crustacea, 360. 



in Fishes, 628. 



in Holothurians, 310. 



— ■ — in Mammals, 830, 831. 

 — ■ — in starfishes, 297. 

 Paroccipital process, 790. 

 Parthenogenesis, 23, 64. 



— in Apus, 340. 



— in Artemia, 339. 



— in Cladocera, 340. 



— in Crustacea, 356. 



— in insects, 395. 

 Particulate inheritance, 90. 

 Partnership, spatial, 209. 

 Partnerships between insects and plants, 



403- 

 Patella, 468, 469, 475- 

 Pathetic nerve, 545. 

 Paunch, 851. 

 Pauropoda, 368. 

 Pauropus, 369. 

 Pearl, 230, 448, 469. 

 Peccaries, 849. 

 Pecora, 848, 851. 

 Pecten, 449, 480. 



— of eye of Birds, 552, 747- 

 Pectines of scorpion, 414. 

 Pectoral girdle, 537. 



Pedal ganglion, 439, 450, 459. 

 Pedalion, 282. 



Pedicellariae, 292, 302. 



Pedicellina, 287. 



Pediculus, 411. 



Pedipalpi, 416. 



Pedipalps of scorpion, 414. 



— • of spider, 417. 



Pelagia, 171, 190, 205, 208. 



Pelagic life, 895. 



Pelagohydra, 204. 



Pelagonemertes, 232, 235. 



Pelagothuria, 305, 310. 



Pelecypoda {see Bivalves), 465, 479. 



Pelias, 707, 709. 



Pelmatozoa, 291, 314 



Pelobates, 677. 



Pelodera, 247. 



Pelomyxa, 131, 141. 



Pelvic 'girdle, 537. 



Penaeus, 353. 



Penella, 343. 



Penguin, 734. 



Penis of Mammals, 811. 



— of snail, 444. 

 Pennatula, 195, 201, 205. 

 Pentacrinus, 311, 313, 314- 

 Pentanymphon, 432. 

 Pentastomum, 424. 

 Pepsin, 30. 

 Peracarida, 350. 

 Peragale, 840. 



Perameles, 777. 827, 839, 840. 



— embyro and membranes of, 820. 

 Peramelidae, 840. 



Perch, 641. 



Perching of Birds, 737. 



Peribranchial cavity, 502. 



Pericardial gland, 462. 



Pericardium, 560. 



Pericolpa, 205. 



Peridinium, 134. 



Perilymph, 549. 



Perineal glands, 802. 



Peripatoides, 366. 



Peripatopsis, 366. 



Peripatus, 319, 361, 362, 363, 362-366. 



— and Annelids, 361, 365 

 — - embryos of, 364. 

 Peripheral segmentation, 78. 

 Periplaneta, 370. 

 Periptychus, 860. 

 Perisarc, 170. 

 Perissodactyla, 847, 852. 



— and Artiodactyla compared, 847. 

 Peristaltic action, 31. 

 Peritoneum, 802. 



Peritricha, 119. 



Perivisceral fluid, 303. 



Periwinkle, 8, 441, 474- 



Perla, 397, 407. 



Permeability of plasma membrane, 38,55- 



Peromedusae, 205. 



Petaurus, 828, 841. 



Petromvzon, 6, 541, 579, 580. 



— and Myxine contrasted, 584. 

 Petrous portion of periotic, 793. 

 Phacochcerus, 849. 



