N 
Pauropoda 
3431 
40 
Radiolaria 
0431 
Pedagogy . . 
0050 
Regeneration 
0215 
Pedi palpi . „ 
. . 
3031 
Reproduction 
, , 
0215 
Pelagic Animals . . 
. , 
0219 
Reproductive Organs 
. , 
0207 
Pelecinidae 
4631 
Reptilia . . 
# f 
5600 
Pelecypoda 
, , 
2213 
Resemblances 
, , 
0219 
Periodicals 
0020 
Respiration 
0211 
Peripatus . . 
, , 
3231 
Respiratory Organs 
# « 
0207 
Perissodactyla 
, . 
6031 
Rlieao 
, , 
5831 
Perlidee 
. . 
3831 
Rhipidoglossa 
, , 
2231 
Phalangida 
3031 
Rkiptoglossa 
5631 
Phasmidab. . 
. . 
3831 
Rhizopoda 
0431 
Phenology 
. . 
0219 
Rhopalocera 
, , 
4431 
Philosophy 
. . 
0000 
Rhynchosauria . . 
, , 
5631 
Phcenicopteri 
, , 
5831 
Rhynchota 
# # 
4000 
Phoronis . . 
. , 
1800 
Rhynchocophalia 
6631 
Phylactolaema . . 
. » 
2031 
Rodentia . . 
6031 
Phyllopoda 
, . 
2631 
Rotifera . . 
, , 
1600 
Phylogeny 
, . 
0223 
Rudimentary Organs 
. . 
0207 
Physiology 
. . 
0211 
Surcosporidia 
. . 
0431 
Physopoda 
. . 
3600 
Saururae . . 
5831 
Pkytophthires 
. . 
4031 
Scaphopoda 
. , 
2231 
Pici 
. . 
5831 
Sehizopoda 
2631 
Pisces 
54C0 
Scolopendrella 
, , 
3131 
Plagiostomi 
. . 
5431 
Scorpionida 
• . 
3031 
Plankton . . 
0219 
Scyphomedusae . . 
0831 
Planipennia 
. . 
3831 
Senescence 
, # 
0211 
Platyhelmintkes . . 
1200 
Sense, Organs of . . 
0207 
Plesiosauria 
, . 
5631 
Function of 
# * 
0211 
Podargidae 
, , 
5831 
Sessiliventres 
, t 
4631 
Podophthalma . . 
. . 
2631 
Sex, Production of 
0211 
Polyckaeta 
. . 
1800 
Sexual Relations . . 
0219 
Polyzoa . . 
. . 
2000 
Siphonaptera 
3600 
Porifera . . 
, , 
0600 
Sirenia 
, # 
6031 
Primates . . 
, . 
6031 
Siricidae . . 
• . 
4631 
Prochordata 
, . 
6000 
Size, Variations of 
, , 
0223 
Procolophonia 
. . . 
5631 
Skeletal Structures (internal) 
of 
Proctotrupidae 
. . 
4631 
Invertebrates . . 
0207 
Proganosauria 
, . 
5631 
Social Relations . . 
. • 
0219 
Proportions, Variations 
i of 
, , 
0223 
Societies, Reports of 
, , 
0020 
Prosobranchiata . . 
, , 
2231 
Solifugte . . 
# , 
3031 
Protection 
, , 
0219 
Sound Production 
# , 
0219 
Proteomyxa 
, , 
0431 
Spermatogenesis . . 
. . 
0215 
Protorosauria 
, , 
6631 
Spermatozoon 
, . 
0215 
Prototracheata . . 
. . 
3200 
Sphegidae . , 
4631 
Protozoa . . 
r . 
0400 
Spongida . . 
0600 
Pselaphognatha . . 
, . 
3431 
Sporozoa . . 
, . 
0431 
Pseiidoscorpiones. . 
. . 
3031 
Steatornis. . 
5831 
Psittaci . . 
. . 
5831 
Steganopodes 
, . 
5831 
Psocidae . . 
. . 
3831 
Stegocephala 
. , 
5631 
Psychology 
. . 
0219 
Stephanidae' 
, , 
4631 
Psyllidae . . 
. . 
4031 
Stereornitlies 
5831 
Ptenoglossa 
. . 
2231 
Stomatopoda 
2631 
Pterocletes 
. . 
5831 
Strepsiptera 
4800 
Pteropoda. . 
. . 
2231 
Striges 
5831 
Pterosauna 
. . 
5631 
Stromatoporidae . . 
. . 
0831 
Pulmonata 
, . 
2231 
Strutliiones 
, , 
5831 
Pygopodes 
. . 
5831 
Stylommatophora 
. . 
2231 
Pytlionomorpha . . 
. . 
5631 
Subungulata 
. . 
6031 
Rachiglossa 
.. 
2231 
Symbiosis . . 
0219 
