INDEX 



513 



Myliobatis, uterus, 495. 



Myochondria, 76, 82. 



My old, cells, 310. 



Myomeres, 88. 



Myotome, 81, 88, 89. 



Mytillus, byssus, 411; pigment in, 271, 274. 



Myzostoma, egg follicle, 455. 



Nail, of man, 385. 



Nautilus, eye of, 253; olfactory tissues, 267. 



Nebenkern, 428. 



Necrophorus, olfactory tissues, 264. 



Nccturus, lung, 321. 



Nematocysts, 376. 



Nemertean, blood vessels, 151. 



Nephridial cells, 341. 



Nephridial tissues, 339-357; of coelenterates, 

 340 ; of Crustacea, 348 ; of Eulalia, 345 ; 

 of insects, 344 ; kinds, 342; of lizard, 350- 

 352; of Lumbricus, 346348; origin of, 

 341 ; of tapeworm, 344. 



Nephrostome, 343, 352. 



Nereis, eye, 242. 



Nerve cell, processes, 175. 



Nerve cell body, 176-181. 



Nerve cells, communicatory, 178; giant, 183- 

 184; grouping of, 177; intracellular 

 channels, 185; motor, 178; origin of, 176; 

 perceptory, 178; of Purkinje, 192. 



Nerve-ending, in mammal's cornea, 201 ; with 

 hairs, 205; of temperature, 207. 



Nerve-endings, on gland cells, 195; motor, 

 191; on muscle, 194. 



Nerve fiber, 187-188; covering of, 188; 

 origin and growth of, 187; regeneration 

 of, 1 88. 



Nerve tissues, 174. 



Nettle cells, of coelenterates, 376. 



Neurite (of nerve cell), 176. 



Neurochondria, 183. , 



Neuro-fibrils, 174-182. 



Neuroglia, 196-197; in visual tissues, 199. 



Neuromuscular nerve-ending, 204. 



Neuron, 175. 



Neuron theory, 1 78. 



Neurons, grouping of, 176-177. 



Neurotendinous nerve-ending, 204. 



Nidamental tissues, 478; of birds, 489; of 

 earthworm, 482 ; of fish, 487 ; of gastero- 

 pod, 483; of leech, 480; of salamander, 

 486; of vertebrates, 485. 



Noctiluca, light production, 125. 



Normoblasts, 172. 



Notochord, Opsanus, 60. 



Nourishing tissues of embryo and parent, 492. 



Nourishing tissues of embryo, in cat, 496; in 

 fish, 500; in gull, 499. 



Nourishing tissues of parent, in Acanthias, 

 492; in Myliobatis, 495. 



Nucleus, 6-7 ; distributed, 6. 



Nurse cells, of developing ova, 453; migra- 

 tion of, in Raja, 438 ; of pollen cells, 430 ; 

 of reproductive tissues, 420; of sperma- 

 tozoa, 429; ovarian, of Ameiurus, 456; of 



2L 



Cambarus, 455; of Esox, 456; of Felis, 

 460; of Forficula, 458; of mammals, 459; 

 of Myzostoma, 455; of Natrix, 458; of 

 Ophryotrocha, 455; of Scolia, 457; of 

 Vanesa, 458. 

 Nyctiphanes, light organ, 129. 



Ocellus, of Dytiscus, 237; of Perla, 238. 

 Octopus, blood vessel, 155; grasping suckers, 



414; nerve fiber, 189; visual tissues, 252. 

 Odd chromosomes, 444. 

 Odorous glands, of insects, 405; of skunk, 



400; of stinking turtle, 402; of toad, 403. 

 Odors, attractive and offensive, 400. 

 (Esophagus, of cat, 295-296; of squid, 295. 

 Olfactory bulb, 193. 

 Olfactory cell, stimulation of, 261. 

 Olfactory tissues, 258; of mollusks, 266-288. 

 Ontogeny, 19. 

 Oocyte, of first order, 461. 

 Oogonium, 461. 

 Oosperm, 419, 461. 

 Ophiura, photogenesis, 123. 

 Ophryotrocha, egg follicle, 455. 

 Opsanus, notochord, 60; yolk membrane, 



500. 



Orders of colonization, 14. 

 Organ, 15, 19. 

 Organization, 19. 

 Osphradium, 266-267. 

 Osteoblasts, 71. 

 Osteoclasts, 73. 

 Ova, follicle cells, 454; food acquisition, 453; 



growth, and maturation of, 453. 

 Ovary, 419. 



Ovis, developing stratified epithelium, 46. 

 Ovum, growth of, in a mammal, 469-473. 



PalcRmon, eye, 235. 



Palamonetes, static hair, 208; tactile hair, 205. 



Pancreatic tissues, 300. 



Pandorina, 14. 



Papilla, of feather, 368. 



Parablastic nuclei, in fish, 501. 



Paraganglionic bodies, 313. 



Paramcecium, food vacuoles, 284. 



Paraplasm, 3. 



Parasynapsis of reproduction chromosomes, 



425- 



Parathyroid gland, 304; of cat, 312. 

 Parthenogenesis, 474. 

 Pecten, eye of, 246-249. 

 Perceptory organs, of nerve cells, 174. 

 Pericardial, glands, 343, 354. 

 Pericheeta, nephrostome, 352. 

 Periphery, of circulation, 149. 

 Periplanata, eye, 234. 

 Peyer's patches, 308. 

 Pholas, light tissue, 126. 

 Pholcus, yolk body, 461. 

 Photinus, light tissue, 133. 

 Photochondria, 125. 

 Photo plasm, 125. 

 Phylodoce, eye of, 243. 



