N 
Pauropoda 
3431 
10 
Radiolaria 
0431 
Pedagogy 
0050 
Regeneration 
0215 
Pedipalpi . . 
3031 
Reproduction 
0215 
Pelagic Animals . . 
0219 
Reproductive Organs 
0207 
PelecinidcD 
4631 
Reptilia . . 
5600 
Polecypoda 
2213 
Resemblances 
0219 
Periodicals 
0020 
Respiration 
Respiratory Organs 
021 1 
Peripatus . . 
3231 
0207 
Pcrissodactyla 
6031 
Rhea) . j . . 
5831 
Perl id to . . 
3831 
Rhipidoglossa 
2231 
Phalangida 
3031 
Rhiptoglossa 
5631 
Phasmidee. . 
3831 
Rhizopoda 
0431 
Phenology 
0219 
Rhopalocera 
4431 
Philosophy 
0000 
Rhynchosauria . . 
5631 
Phoenicopteri 
5831 
Rhynchota 
4000 
Phoronis . . 
1800 
Rhynchocephalia 
5631 
Phylacfcolaema . . 
2031 
Rodentia . . 
6031 
Phyllopoda 
2631 
Rotifera . . 
1600 
Pliylogeny 
0223 
Rudimentary Organs 
0207 
Physiology 
0211 
Sarcosporidia 
0431 
Physopoda 
3600 
Saururee . . 
5831 
Phytophthires 
4031 
Scaphopoda 
2231 
Pici 
5831 
Schizopoda 
2631 
Pisces 
5400 
Scolopendrella 
3431 
Plagiostomi 
5431 
Scorpionida 
3031 
Plankton . . 
0219 
ScyphomedustB . . 
0831 
Planipennia 
3831 
Senescence 
0211 
Platyholminthes . . 
1200 
Sense, Organs of . . 
0207 
Plesiosauria 
5631 
Function of 
0211 
Podargidte 
5831 
Sessili ventres 
4631 
Podophtlialma . . 
263 L 
Sex, Production of 
0211 
Polyehreta 
1800 
Sexual Relations . . 
0219 
Polyzoa . . 
2000 
Siphonaptera 
3600 
Porifera . . 
0600 
Sirenia 
6031 
Primates . . 
6031 
Siricida) . . 
4631 
Prochordal a 
5000 
Size, Variations of 
0223 
Procolophonia 
5631 
Skeletal Structures (internal) 
of 
Procfcotrupidte 
4631 
Invertebrates . . 
0207 
Proganosauria 
5631 
Social Relations . . 
0219 
Proportions, Variations 
5 of 
0223 
Societies, Reports of 
0020 
Pro8obranchiata . . 
2231 
Solifugo) . . 
3031 
Protection 
0219 
Sound Production 
0219 
Proteomyxa 
0431 
Spermatogenesis . . 
0215 
Protorosauria 
5631 
Spermatozoon 
0215 
Prototracheata . . 
3200 
Sphegidce . . 
4631 
Protozoa . . 
0400 
Spongida . , 
0600 
Pselaphognatha . . 
3431 
Sporozoa . . 
0431 
Pseudoscorpiones. . 
3031 
Steatornis. . 
5831 
Psittaci . . 
5831 
Steganopodes 
5831 
Psocida? . . 
3831 
Stegocephala 
5631 
Psychology 
0219 
Stephanidee 
4631 
Psyllidae . . 
4031 
Stereornithes 
5831 
Ptenoglossa 
2231 
Stomatopoda 
2631 
Pterocletes 
5831 
Strepsiptera 
4800 
Pteropoda. . 
2231 
Striges . . _ . . 
5831 
Pterosauria 
5631 
Stromatoporidse .. 
0831 
Pulmonata 
2231 
Strutliiones 
5831 
Pygopodes 
5831 
Stylommatophora 
2231 
Pythonomorplia . . 
5631 
Subungulata 
6031 
Rachiglossa 
2231 
Symbiosis , . 
0219 
