464 



INDEX 



Neuroblast cells, 487 

 Neuroglia, 99 

 Neuromasts, 397 

 Neuron, 96, 97, 341, 342, 344 



relations in spinal cord, 372 

 Neurosensory cells, 338, 393, 394 

 Nodes of Ranvier, 99 

 Non-epithelial tissues, 93 

 Notochord, 52, 59, 63, loi, 102, 146, 185 



224 

 Nuclei pulposi, 151 



O 



Oculomotor nerves, 352, 353, 374 

 Olfactory nerves, 352, 353, 374 



organs, 399-403 

 Omasum, 231 

 Omenta, 236, 238 

 Ontogenesis, 157 



olfactory organ, 403 

 Optic nerve, 352, 353, 374, 413 



vesicles, 413 

 Oral cavity, 226 

 Organisms, sequence of, 25 

 Organogenesis, 58, 62, 78 

 Organs, 85 

 Orifice, cardiac, 228 

 Ornithodelphians, 18 

 Os uteri, 310 

 Osborn's Theory, 133 

 Ostium tubae, 308 

 Ostracoderm(ata)(i), 13, 23 

 Ova, 308 



Ovarian ligament, 308 

 Ovaries, 308, 309 

 Oviparity, 30, 31 

 Ovum(a), 30 



Pain, 395 



Paired appendages, 147 



eyes, 196, 407 



fins, 178 



gills, 246 



muscles, 204 

 Palantine tonsil, 225, 226, 253 

 Palate, soft, 225, 226 

 Paleostoma, 218 

 Paleozoic, 25 



Pancreas, 66, 217, 242-244, 325 

 Papillae, 223, 225 



Paracasein, 230 

 Paracone, 133 

 Paraconid, 133 



Parasympathetic nerves, 381, 383 

 Parathyroid, 66, 331-333 

 Parietal cells, 230 



eyes, 415 

 Parotid, 221, 223 

 Pectoral girdle, 179, 180, 181, t86 

 Pedicle, 149 

 Pelvic girdle, 148 

 Pelvis, 318 

 Penis, 314 

 Pepsin, 230 

 Perichondrium, 188 

 Perilymph, 420 

 Perimysium, 191 

 Perineum, 235, 320 

 Periosteum, 188 

 Perissodactyls(a) , 20, 23 

 Peristaltic waves, 233, 239 

 Peritoneum, 236 

 Pharyngeal cleft, 65 

 derivatives, 253 



Pharynx, 217, 225 



Phylogenesis, nervous system, 344 

 reproductive system, 297-303 

 urinary system, 290-297 

 vertebrate mouth, 221 



Phylogenetic series, 3 

 tree, 2, 431 



Pia mater, 392 



Pigmentation, 123, 124 



Pineal, 362 

 eyes, 415 



Pinna, 419 



Pisces, 15 



Pithecanthropus, 24 



Pituitary, 334-33^ 



Placentals, 19, 23, 36, 37, 55, 57, 83, 303 



Plasma, 107, 263 



Platyhelminthes, 22 



Platyrhina, 21, 24 



Pleural cavity, 253-261 



Plexus, 341 



Polyphyodont, 134 



Porifera, 22 



Postcava, 284 



Postganglionic fibers, 381 



Precava, 284 



Preganglionic fibers, 381 



Prepuce, 314, 323 



