356 



Index 



Nerves — Contintied 



trigeminal, 68, 133, 135, 136, 



trigeminal, inferior maxillary 



branch, 136 

 trigeminal, ophthalmic branch, 



136 



trigeminal, supenor maxillary 



branch, 136 



trochlear, 133 



vagus, 68, 134, 137 

 Nervous epithelium of ear, 149 

 Nervous layer of ectoderm, 259, 



268 

 Nervous system, 131 

 Nest of alligator, compactness of, 

 21 



construction of, 21 



form of, 21 



location of, 20 



size of, 21 



temperature in, 24 

 Neural arches, development of, 



325.331 ,. , „ 



Neural groove, see Medullary 



groove 

 Neurenteric canal, 264, 267, 272, 



275, 282, 336 

 New York Zoological Park, croco- 



dilians in, 39 

 Nictitating membrane, 144 

 Notochord. 236, 238, 245, 248, 



249, 251, 255, 256, 260, 263, 



266, 269, 270, 285, 295, 306, 



335 



Nuchal shield, 47 



Obex, 133 



Oblique muscles, 146 

 Odontoid process, 52, 54 

 CEsophagus, 151, 152, 324, 330 



cilia of, 174 



epithelium of (feeding), 173 



epithelium of (hibernating), 172 



histology of, 168 



transsections of (figures), 169, 

 170 

 Okefinokee, 10, 226 

 Olfactory bulb, 132, 1 33 

 Olfactory lobes, development of, 



332 



Olfactory tract, 132, 133, 134 



Olivary enlargement of oesopha- 

 gus, 151 



Optic chiasma, 134 

 cup, 302, 309, 310, 321 

 lobes, 132, 133, 135 

 nerve, development of, 321 

 stalk, 302 V 



tracts, 134 1 



vesicle, 274, 276, 282, 294 



Oral cavity, 150 



Ora serrata, 147 



Osteolsemus tetrapis, 3 



Otic vesicle, see Auditory vesicle 



Outer ear, 148 



Ova, 193 



Ovary, 193 



Oviducts, 156, 193, 194 



Palm Beach, Fla., 9 



Pancreas, 154 



development of, 326 



Papillae of tongue, 150 



Paraphysis, 132, 133 



development of, 319, 320, 330 



Pecten, 147, 321 



Pectoral girdle, 81 



Penis, shaft of, 194 



Pericardium, 323 



Periotic capsule, 73 



Pes, 317, 318, 329 



Petromyzon marinus, 157 



Pharynx, development of, 277, 

 285, 292, 295, 299 



Pigment, 333, 334 



Pineal body, 132, 319 



Pits in scales, 49 



Pituitary body, see Hypophysis 



Plover and crocodile, 40 



Posterior cardinal vein, develop- 

 ment of, 298 



Postorbital bar, 60 



Prickle cells, 49 



Primitive groove, 246, 249, 250, 

 256, 265, 267 



Primitive spinal column, 326 



Primitive streak, 233, 240, 246, 

 249, 250, 256, 265, 267, 275 



Procoelia, i 



Pulp cavit}'- of tooth, 65 



Pupil, 146 



