40 
Pauropoda 
, # 
3431 
Radiolaria . . 
. . 
0131 
Pedagogy . . 
. . 
0050 
Regeneration 
0215 
Pedipalpi . . 
, . 
3031 
Reproduction 
. . 
0216 
Pelagic Animals . . 
, , 
0219 
Reproductive Organs 
0207 
Pelecinidce 
. , 
4631 
Reptilia . . 
. . 
5600 
Pelecypoda 
, # 
2213 
Resemblances 
0219 
Periodicals 
0020 
Respiration 
. . 
0211 
Peripatus . . 
. , 
3231 
Respiratory Organs 
. . 
0207 
Perissodactyla 
. . 
6031 
Rheas 
. . 
5831 
Perlidae . . 
. . 
3831 
Rliipidoglossa 
. . 
2231 
Phalangida 
. . 
3031 
Rhiptoglossa 
. . 
5631 
Phasmidae. . 
. . 
3831 
Rhizopoda 
0431 
Phenology 
. . 
0219 
Rhopalocera 
4431 
Philosophy 
. . 
0000 
Rhynchosauria . . 
. . 
5631 
Phcenicopteri 
. . 
5831 
Rhynchota 
4000 
Phoronis . . 
. . 
1800 
Rhyncliocephalia 
. . 
5631 
Phylaetolaema . . 
. . 
2031 
Rodentia . . 
. . 
6031 
Phyllopoda 
. . 
2631 
Rotifera . . 
. . 
1600 
Phylogeny 
. . 
0223 
Rudimentary Organs 
. . 
0207 
Physiology 
. . 
0211 
Sarcosporidia 
. . 
0431 
Physopoda 
. . 
3600 
Saururae . . 
5831 
Phytophthires 
. . 
4031 
Scaphopoda 
2231 
Pici 
. . 
5831 
Schizopoda 
. . 
2631 
Pisces 
. . 
5400 
Scolopendrella 
. . 
3131 
Plagiostomi 
, . 
6431 
Scorpionida 
. . 
3031 
Plankton . . 
# # 
0219 
Seyphomodusao . . 
, , 
0831 
Pluniponnia 
, . 
3?3l 
Senescence 
, , 
0211 
Plutyhelminthes . . 
. . 
1200 
Sense, Organs of . . 
. . 
0207 
Plesiosauria 
, , 
6631 
Function of . . 
, . 
0211 
Podargidae 
. . 
5831 
Sessiliventres 
4631 
Podophthalma . . 
. . 
2631 
Sex, Production of 
. . 
0211 
Polychaeta 
1800 
Sexual Relations . . 
. . 
0219 
Polyzoa . . 
2000 
Siphonaptera 
3600 
Porifera . . 
. . 
0600 
Sirenia 
6031 
Primates . . 
, , 
6031 
Siricidae . . 
4631 
Proohordata 
, . 
5000 
Size, Yariations of 
# 9 
0223 
Procolophonia 
. . 
5631 
Skeletal Structures (internal) 
of 
Proctotrupidee 
4631 
Invertebrates . . 
. . 
0207 
Proganosauria 
. . 
5631 
Social Relations . . 
. . 
0219 
Proportions, Yariations 
i of 
. . 
0223 
Societies, Reports of 
, , 
0020 
Prosobranchiata . . 
, , 
2231 
Solifugae . . 
. , 
3031 
Protection 
, , 
0219 
Sound Production 
0219 
Proteomyxa 
. . 
0431 
Spermatogenesis . . 
0215 
Protorosauria 
. . 
5631 
Spermatozoon 
. . 
0215 
Prototracheata . . 
, . 
3200 
Sphegidae . . 
. . 
4631 
Protozoa . . 
. . 
0400 
Spongida . . 
. . 
0600 
Pselaphognatlia . . 
, . 
3431 
Sporozoa . . 
. . 
0431 
Pseudoscorpiones. . 
. . 
3031 
Steatornis. . 
. . 
5831 
Psittaci . . 
. . 
5831 
Steganopodes 
5831 
Psocidee . . 
. . 
3831 
Stegocephala 
. . 
5631 
Psychology 
0219 
Stephanidae 
. . 
4631 
Psyllidae . . 
. . 
4031 
Stereornithes ... 
, , 
5831 
Ptenoglossa 
. . 
2231 
Stomatopoda 
, . 
2631 
Pterocletes 
. . 
5831 
Strepsiptera 
. . 
4800 
Pteropoda. . 
. . 
2231 
Striges . . . . , . 
5831 
Pterosauria 
. , 
6631 
Stromatoporidae . . 
. . 
0831 
Pulmonata 
, . 
2231 
Struthiones 
5831 
Pygopodes 
. . 
5831 
Stylommatopliora 
. . 
2231 
Pytlionomorpha . . 
. . 
5631 
Subungulata 
. . 
6031 
Rachiglossa 
2231 
Symbiosis . . 
•• 
0219 
