INDEX- 367 



Metabolism, 134. 



Metacarpus, 242. 



Metamorphosis, 116. 



Metatarsus, 244. 



Mid-brain, 103, 291, 293. 



Molybdis Entzi, 43. 



Monostomum, 42. 



Mouth, 68, 116. 



Mucigen, 144. 



Mucosa, 139, 149. 



Miillerian duct, 115. 



Muscle fibers, 128-130. 



Muscles, kinds of, 247 ; of body wall, 

 25s. 256; of eye, 333; of hind leg, 

 248-255 ; seasonal changes of, 34 ; 

 of throat, 257. 



Muscularis mucosae, 139. 



Myotome, no. 



Myxosporidia, 43. 



Nares, 63, 69, 102. 

 Nasal bone, 232 ; capsule, 232. 

 Necturus, 3, 4. 

 Nematoxys, 41. 

 Nephrostome, 113, 204. 

 Nerve, 131 -, cells, 132. 

 Nervous system, 80, 195, 283. 

 Neural arch, 237 ; spine, 237, 

 Neurenteric canal, 105. 

 Neurilemma, 131. 

 Neuroglia, 287. 



Nictitating membrane, 63, 325. 

 Nodes of Ranvier, 131. 

 Nostrils, 63, 102. 

 Notochord, 97, 115. 

 Nototrema, 17. 

 Nucleus, of egg, 85. 



Occipital condyle, 229. 



Odontoblasts, 72. 



CEsophagus, see Esophagus. 



Olecranon, 241. 



Olfactory capsule, 232; lobe, 291, 



294; nerve, 295, 324 ; organ, 323. 

 Opalina, 43. 

 Operculum, 118, 119. 

 Optic chiasma, 294; lobe, 103, 293, 



311; nerve, 104, 296; thalamus, 



104 ; ventricle, 293. 

 Orbit, 62. 

 Osteoblasts, 127. 

 Osteoclasts, 73. 

 Otoliths, 336, 337. 

 Ova, 81, 212. 

 Ovary, 74, 212. 

 Oviduct, 76, 213. 

 Oviposition, 44, 48, 50, 214. 

 Oxysoma, 41. 



Palatine, 233, 



Pancreas, 74, 107, 151, 219. 

 Pancreatic duct, 107, 151; juice, 151. 

 Papillae, of skin, 179, 186, 321 ; of 



tongue, 70, 322. 

 Parabasal, parasphenoid, 231. 

 Paracoccidium Prevoti, 43. 

 Paraphysis, 293. 

 Parasites, 40. 

 Parietal nerve, 294. 

 Pectoral girdle, 238. 

 Pelobatidae, 11, 12. 

 Pelvic girdle, 242. 

 Pepsin, 142, 147. 

 Pepsinogen, 147. 

 Peptones, 142. 

 Pericardium, 73, in, 264. 

 Perichondrium, 126. 

 Perilymph, 336. 

 Periosteum, 127. 



Peritoneum, 78, in, 139, 148, 213. 

 Pes, 65. 



Phalanges, 242. 

 Phaneroglossa, 11. 

 Pharynx, 138. 

 Photopathy, 348. 

 Phototaxis, 346. 

 Pia mater, 285. 

 Pigment, 67, 154, 188, 221 ; cells, 154, 



188. 

 Pineal gland, 64, 104. 

 Pipa americana, 12. 

 Pituitary body, 104, 

 Plasma, of blood, 262. 

 Pleistophora Danilevvskyi, 43. 



