N 
Pauropoda 
3431 
Pedagogy 
0050 
Pedipalpi . . 
303 L 
Pelagic Animals . . 
0219 
Pelecinidse 
4631 
Pelecypoda 
2213 
Periodicals 
0020 
Peripatus . . 
3231 
Perissodactyla 
6031 
Perlidce 
3831 
Phalangida 
3031 
Phasmida. . 
3831 
Phenology 
0219 
Philosophy 
0000 
Phoenicopteri 
5831 
Phoronis . . 
1800 
Phylactolaema . . 
2031 
Phyllopoda 
2631 
Phylogeny 
0223 
Physiology 
0211 
Physopoda 
3600 
Pkytoplithires 
4031 
Pici 
5831 
Pisces 
54C0 
Plagiostomi 
5431 
Plankton . . 
0219 
Planipcnnia 
3b 3 L 
Platyhelminthes . . 
1200 
Plesiosauria 
5631 
Podargidee 
5831 
Podophthalma . . 
263 L 
Polycheeta 
1800 
Polyzoa . . 
2000 
Porifera . . 
0600 
Primates . . 
6031 
Prochordata 
5000 
Procoloplionia 
5631 
Proctotrupidee 
4631 
Proganosauria 
5631 
Proportions, Variations 
i of 
0223 
Prosobranchiata . . 
2231 
Protection 
0219 
Proteomyxa 
0431 
Protorosauria 
5631 
Prototracheata . . 
3200 
Protozoa . . 
0400 
Pselaphognatlia . . 
3431 
Pseudoscorpiones. . 
3031 
Psittaci .. 
5831 
Psocidse .. 
3831 
Psychology 
0219 
Psyllidae . . 
4031 
Ptenoglossa 
2231 
Pterocletes 
5831 
Pteropoda . . 
2231 
Pterosauna 
5631 
Pulmonata 
2231 
Pygopodes 
5831 
Pythonomorpha . . 
5631 
Rachiglossa 
2231 
Radiolaria 
0131 
Regeneration 
0215 
Reproduction 
0215 
Repi’oductive Organs 
0207 
Reptilia . . 
5600 
Resemblances 
0219 
Respiration 
0211 
Respiratory Orgaus 
0207 
Rhea 
5831 
Rhipidoglossa 
2231 
Rhiptoglossa 
5631 
Rhizopoda 
0131 
Rhopulocera 
4431 
Rhynchosauria . . 
5631 
Rhyncliota 
4000 
Rhynchocephalia 
5631 
Rodentia . . 
6031 
Rotifera . . 
1600 
Rudimentary Organs 
0207 
Sarcosporidia 
0431 
Saururae . . 
5831 
Scaphopoda 
2231 
Schizopoda 
2631 
Scolopendrella . . 
3131 
Scorpionida 
3031 
Scyphomedusce . . 
0831 
Senescence 
0211 
Sense, Organs of . . 
0207 
Function of 
0211 
Sessiliventres 
4631 
Sex, Production of 
0211 
Sexual Relations . . 
0219 
Siphonaptera 
3600 
Sirenia 
6031 
Siricida . . 
4631 
Size, Variations of 
0223 
Skeletal Structures (internal) 
of 
Invertebrates . . 
0207 
Social Relations . . 
0219 
Societies, Reports of 
0020 
Solifuga . . 
3031 
Sound Production 
0219 
Spermatogenesis . . 
0215 
Spermatozoon 
0215 
Sphegidee . . 
4631 
Spongida . . 
0600 
Sporozoa . . 
0431 
Steatornis. . 
5831 
Stegauopodes 
5831 
Stegocephala 
5631 
Stephanida 
4631 
Stereornithes 
5831 
Stomatopoda 
2631 
Strepsiptera 
4800 
Striges 
5831 
Stromatoporida . . 
0831 
Strutliiones 
5831 
Stylommatopliora 
2231 
Subungulata 
6031 
Symbiosis.. 
0219 
