356 
Nerves—Continued 
trigeminal, 68, 133, 135, 136, 
137 
trigeminal, inferior maxillary 
branch, 136 
trigeminal, ophthalmic branch, 
136 
trigeminal, superior 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 Zodlogical 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 
Cisophagus, 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, 133 
Olfactory lobes, development of, 
332 
Index 
Olfactory tract, 132, 133, 134 
Olivary enlargement of cesopha- 
gus, 151 
Optic chiasma, 134 
cup, 302, 309, 310, 321 
lobes, 132, 133, 135 
nerve, development of, 321 
stalk, 302 
tracts, 134 
vesicle, 274, 276, 282, 294 
Oral cavity, 150 
Ora serrata, 147 
Osteolemus 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 
Papille 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 
Plaver and crocodile, 4o 
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 
Proccelia, 1 
Pulp cavity of tooth, 65 
Pupil, 146 
