342 



INDEX. 



Nasal is, teeth, 219 



Naso-palatine duct of Cyclostomes, 171 



Naso-lacrymal duct, 174, 194 



Navicular, 109 



Neomorph, 33, 48, 236 



Nephridia, 296 



Nephrostomes, 297, 302, 304, 307 



Nerve, lateral, 158, 165 

 phrenic, 122 



Nerve-roots, 151, 152 



Nerves: cranial, 153160; olfactory, 154; 

 optic, 132, 155 ; oculomotor, trochlear, 

 and abducent, 156; trigeminal, 118 120, 

 126, 156, 165, 193; facial, 60, 118120, 



158 ; auditory, 158 ; glossopharyngeal, 

 60, 118120, 158 ; vagus, 60, 118, 119, 

 158, 160, 165, 284 ; spinal accessory, 



159 ; hypoglossal, 119, 159 

 Nerves : spinal, 152 



Nervous system : central, 129 151; peri- 

 pheral, 151 160; sympathetic, 129, 152, 

 160 



Neural tube, 9 



Neurenteric canal, 129 



Nenrilemma, 129 



Neuroglia, 129 



Neuropore, of Tunicata and Amphioxus, 

 188 



Nictitating-memhrane, 192 



Nose, external, 177 



Nothosaurus, abdominal ribs, 50 



Notochord, 10, 3347 



Notodelphys, external gills, 251 



Nucleus, 3 



O. 



Obturator foramen, 95 



Odontoid bone, 43 



Odontornithes, teeth, 216 



(Esophagus, 209, 228, 23 1 



Olfactory organ, 170 177 



Olfactory region of skull, 58 



Olfactory scrolls, 176 



Omosternum, 51 



Ontogeny, 1 



Opercular bones, 69 



Operculum, 65, 158, 249, 250 



Orbicular apophysis, 202 



Orbital region of skull, 58 



Orbital ring, 69 



Organ of Corti, 201, 202, 206 



Organs, 1 : electric, 128 ; sensory, 162 

 207 ; of nutrition, 208243 ; of respira- 

 tion, 245 265 ; of circulation, 268 

 294 ; urinogenital, 296330 



Ornithorhynchus : eggs, 5, 320 ; pectoral 

 arch, 91 ; urinogenital organs, 321 



Ornithoscelida, sacral vertebrae, 43 



Orthagoriscus, spinal cord, 131 



Os penis and clitoridis, 329 



Ossification, 62 



Otoliths, 196 



Ovary, 311320, 322, 325 

 Oviducal gland, 311 

 Oviduct, 302, 31132 

 Ovipositor, 311 

 Ovotestis, 316 

 Ovum, 2 



Palaeontology, 1 



Palate, 75, 81, 209 



Palpebrae, 184 



Pancreas, 243 



Panniculus adiposus, 26 



Papilla acustica, 198, 199, 202 



Papillse, of tongue, 166, 222 



Parabronchia, 262 



Parachordal cartilages, 57 



Paradoxurus, number of caudal vertebra, 



47 



Parorchis, 298, 306, 320 

 Parostosis, 62 

 Parovarium, 298, 322 

 Parrot : number of vertebrae, 45; frontc- 



nasal joint, 80 

 Pars acetabularis, 93 98 

 Pars basil aris, 198 

 Pars superior and inferior of membranous 



labyrinth, 198 

 Patella, 110 

 Pecten, 188 



Pectineal process of pubis, 98 

 Pectoral arch, 8691 

 Pelvic arch, 86, 92 

 Pelvis of kidney, 309 

 Penis, 328 

 Pennse, 22 



Pericardium, 208, 265, 263 

 Perilymph, 196 

 Perissodactyle feet, 1 09 

 Peritoneal funnels, 297, 302 

 Peritoneum, 208 

 Pes, 102 

 Phalanges, 104 



Phalangista, nrinogenital organs, 322 

 Phagocytes, 239 



Phascolomys, urinogenital organs, 322 

 Pharynx, 209 



Phyliodactylus : tongue, 224; larynx, 254 

 Phylogeny, 1 

 Physiology, 2 

 Physoclisti, 251 

 Physostomi, 251 

 Pia mater, 135 

 Pigment of retina, 183 

 Pigment of skin, 19 

 Pineal gland, 132, 142 

 Pinna of ear, 198 

 Pisiform bone, 106, 109 

 Pituitary body, 133 

 Pituitary space, 57 

 Placenta, 10, 274 

 Placenta, umbilical, 12 



