326 
Pharynx, 71. 
Phiegethontius carolina, larva of 
(illus.), 215. 
Phrynosoma  blainviller 
181. 
Phyllium (illus.), 210. 
Phyllopteryx (illus.), 212, 
Physalia (illus.), 175. 
Physiology, 64. 
Physoptora (illus.), 47. 
Pocket-gopher, nest of (illus.), 271. 
Pointer dog (illus.), 256. 
Polistes, parasitized by Stylops 
(illus), 192. 
. Polygamy, 59. 
Polymorphism, 42. 
Polyps, 37. 
Polystomella strigillata (illus.), 17. 
Porcupine-fish (illus.), 134. 
Post-embryonic development, 80. 
Pigeon horn-tail (illus.), 191. 
Pipe-fish (illus.), 212. 
Planaria, alimentary canal of 
(illus.), 70. 
Plankton, 304. 
Plants, difference between animals 
and, 111. 
Platophrys lunatus (illus.), 100. 
Play, instincts of, 247. 
Pluteus, 96. 
Precocial, 140. 
Prawn, adult and larva (illus.), 195. 
Praying-horse (illus.), 127. 
Pressure, a condition of animal 
life, 109. 
Primitive form, 20. 
Primitive life, 21. 
Prionus, larva of (illus.), 146. 
Processes, life, 21. 
Promethea moth (illus.), 231. 
Prophysema primordiale (illus.), 
34, 
(illus.), 
ANIMAL LIFE 
Protective resemblance, 201. 
Protoplasm, 3; chemical constitu- 
tion of, 4; physical constitution 
of, 4. 
Protozoa, 1; colonial, 24; marine, 
15. 
Psaltriparus minimus, nest of 
(illus.), 270. 
Pseudopod, 5. 
Pterophryne histrio in Sargassum 
(illus.), 208. 
Pupa, 93. 
Puss moth, larva of (illus.), 216. 
Quiescence, degeneration through, 
193. 
Rabbit, embryonic stages of (illus.), 
” 87. 
Radiolaria, 16. 
Radiolaria-ooze, 19. 
Raja binoculata (illus.), 140. 
Realm, Arctic, 297; Australian, 
303 ; Indo-African, 301; Lemu- 
rian, 3802; Neotropical, 301; 
North Temperate, 299; of ani- 
mal life, 297; Patagonian, 302; 
South American, 301. 
Realms, subordinate, 303. 
Reason, 251. 
Recognition marks, 22, 129, 223, 
Rectum, 68. 
Reflex action, 241. 
Remora (illus.), 173. 
Remora remora (illus.), 125. 
Reproduction, 9, 50; instincts of, 
249. 
Reproductive cells, 28, 55. 
Resemblance, aggressive, 202 ; gen- 
eral protective, 202; protective, 
201; special protective, 207; va- 
riable protective, 204, 
