434 



INDEX 



Prototheria, classified, 271, 274 



Protozoa, 26, 29, 31, 32, 33, 34, 38, 57, 

 59, 61, 62, 64, 65, 66, 68, 76, 81, 84, 

 85, 93, 96, 102, 107, 166, 168, 171, 

 172, 173, 174, 175; classified, 268, 

 271; fission in, 171; possible matura- 

 tion in, 180; rejuvenation in, 180; 

 reproduction of, 190; sexual repro- 

 duction in, 175; significance of 

 fertilization in, 180 



Protozoologist, defined, 267 



Protylopus, 329 



Provinces, zoogeograpliical, 309 



Prussia, ancient men of, 336 



Pseudacris fcriarum, range of, 308 



Psevdacris ornata, range of, 308 



Pseudopodium, 30, 61, 62 



Psychozoic, in time scale, 315 



Ptyalin, 56, 143, 144, 146 



Pubis, 138 



Pulmonary circulation, 124 



Pulmonata, classified, 269 



Pupa, 232; of swale-fly, 232 



Purkinje cells, 114 



Pylorus, 117, 120 



Pyrosoma, 101, 102, 103, 169 



Python, incubation in, 199 



Quail, extinction of, 307 

 Quaternary, in time scale, 315 

 Queens (bees), 181 



Rabbit, birth stages in, 201; snow shoe, 

 range of, 292 



Raccoon (see Procyon lotor) 



Race and genetics, 258 



Race and history, 258 



Racial unity, 335 



Radial canals, 100 



Radiale, 138 



Radial symmetry, 105, 106 



Radial type, 18 



Radiolaria, classified, 268 



Radius, 138, 139 



Rainfall in Michigan, 294; in environ- 

 ments, 294, 305 



Rain marks, fossil, 313 



Raji, classified, 270 



Rana pipiens, range of, 297 



Range, of amph bious animals, 292; of 

 aquatic forms, 297; differences in 

 continuity of, 289, 291; differences 

 in phj'sical conditions in, 289, 292; 

 differences in position of, 289; dif- 



ferences in proximity of, 289, 299; 

 extended by normal migration, 304; 

 of families, 290, 291; of forest ani- 

 mals, 292, 294; of genera, 290, 291; 

 of orders, 291 ; of plains animals, 292, 

 294; of prairie animals, 292, 294; re- 

 lation to major environments, 297; 

 of species, 290, 291; of terrestrial 

 forms, 297; of various animals, 289- 

 294 



Ratios, accuracy of, 247 



Ray, John, 16, 261, 262 



Rays, classified, 273 



Reactions and habitat, 284 



Realms, zoogeographical, 309 



Recapitulation theory, 234 



Recent, in time scale, 315 



Receptacle, seminal, 128, 129, 130, 185 



Receptaculum seminis 128, 129, 130 



Recessive, 244 



Rectum, 118 



Red beds, 318, 319; Amphibia in, 319; 

 reptiles in, 319 



Red-headed woodpecker, range of, 292 



Redi, Francesco, 165, 166 



Redia, 182, 183 



Reduction, 212, 242 



Reduction division, 211, 212, 253 



Reflex action, 161, 162 



Reflex arc, 160, 162 



Regeneration, 66; in Stentor, 67 



Regions, zoogeographical, 309 



Rejuvenation in Protozoa, 180 



Relations, of animals to plants, special- 

 ized, 282 



Relationships of living animals, bearing 

 of paleontology on, 331 



Remak, Robert, 70 



Renal portal vein, 127 



Rennin, action of, 144 



Reproduction, 60, 165-187; asexua , 168; 

 combined tj^pes of, 186; conditions 

 of, 189; early ideas of, 165; in Eudo- 

 rina, 190; in Gonium, 190; in Heter- 

 omita lerifi, 190; in Paramecium, 190; 

 in Protozoa, 190; rate of, in earth- 

 worms, 303; sexual, 90, 168, 173, 186; 

 sexual, defined, 189; imisexual, 181; 

 in Volvox, 190; in Vorticella, 190. 

 (See also Copulation, Fertihzation, 

 Eggs, etc.) 



Reproductive organs of earthworm, dia- 

 gram of, 128 



