Hyobranchial or anterior branchial groove, 



288 

 Hyodentine, 236, 248 

 Hyoid apparatus, 41, 44, 46, 49, 51, 64, 65, 



69, 72, 78, 80, 8/ 

 Hyoid afferent artery, 357 

 Hyoid arch, 41, 126 

 Hyoid cornu, 69 

 Hyoid efferent artery, 359 

 Hyoid hemibranch, 287, 288, 288, 289 

 Hyoidean sinus, 366 

 Hyomandibula, 94, 99, 106, 107, 115 

 origin in Dipnoan, 102 



shark, 119, 122 



teleost, 1 1 1 

 Hyomandibular foramen, 95 

 Hyostylic jaw suspension, 119 

 Hypapophysis, 145, 146, 149 

 Hypaxial division of myotome, 420 

 Hyperlrophied, nephric duct, 310 

 Hypoblast, 201,203,205 

 Hypobranchial artery, 357 

 Hypobranchial element, 107 

 Hypobranchial muscles, 420 

 Hypocercal tail, J/, 169, 170 

 Hypochordal rod, see subchordal rod 

 Hvpogeophis (see also Apoda), 282, 300, 301, 



403 

 mesodermal components, 30/ 

 Hypogastric artery, 367, 368 

 Hypoglossal nerve (XII), 387 



foramen, 51 

 Hypohyal, 41, 64, 95, 107 

 Hypophyseal cartilage, 54, 131 

 Hypophyseal connective vein, 365 

 Hypophyseal duct, 290 

 Hypophyseal fenestra, 109, 122, 129, 131 

 Hypophyseal foramen, 99 

 Hypophyseal plate, 54 

 Hypophyseal sac, 199 

 Hypostoma scale, 238 

 Hypothalamus, 384 

 Hypsodont, 251 

 Hypural plates, 168 

 Hyrax. 254,291,257 



Ichthyosaur fins, 166 

 Ichthyopterygium, 180 

 Uhtkyophis, skin, 224 



Ichlhyoslega, Ichthyostegid (see also Acantho- 

 'slega), 21,33,55,88, 151, 418 



skull and mandible, 89 



vertebrae, 153 

 Ictidosaur, see Dmrlhrognathus 

 Idiis, pearl organs, 226 



Iguana, 22, 64, 146, 176, 256, 257, 260, 347, 

 356, 405, 432 



aortic arches, 348 



digestive tract, 260 



external appearance, 28 



muscles, pectoral limb, 435, 436, 437 



pectoral girdle, 174 



skin surface (scales), 221 

 Ileocolic junction, 256 

 Ileocolic valve, 253 

 Ileum, 253 

 Iliac artery, external, 367 



Iliac process, 180, 182 



Iliac veins, 368 



Iliacus, 430 



Iliopsoas, 429 



Ilium, 143, 145, 149, 171, 176 



Incisive foramina, 64 



Incisor teeth, 39, 251 



Incus, 36, 41,46, 59 



Inferior branchial sinuses, 365 



Inferior colliculi, 384 



Inferior gnathal cartilage, 84 



Inferior jugular, 363 



Inferior mesenteric artery, 367 



Inferior oblique muscle, 422 



Inferior opthalmic veins, 361 



Inferior rectus muscle, 422 



pars depressor palpebrae, 423 



pars rectus, 423 

 Inferior sagittal sinus, 360 

 Inferior temporal fenestra, 65 

 Inferognathal, 127 

 Infraorbital artery, 358 

 Infraorbital bone, 105 

 Infraorbital (sensory-canal) line, 410 

 Infraorbital process of suborbital, 127 

 Infundibulum, 379 

 Ingression, 201,205, 207 

 Inner ear, 406 

 Inner shell membrane, 201 

 Inner sinus, 205 

 Innominate bone, 171 

 Inscctivores, 22, 291 

 Insertion, muscle, 420 

 Interareal grooves, 41 1 

 Intercalare, 106 



origin in teleost, 1 1 1 

 Intercellular matrix, 225 

 Intercentrum, 141, 145, 146, 147, 149, 192 

 Interclavicle, 171, 173, 177, 179, 181, 184, 



191 

 Interglobular spaces, 243 

 Interhyal, 107, 115 

 Intermandibular cartilage, 80, 107 

 Intermediate cuneiform, 173 

 Intermediate mass or massa intermedia, 384 

 Intermedium, 172, 173 

 Intermuscular bones, 188 

 Internasal, 105, 111, 114 

 Internasal cavities, 96 

 Internal acoustic meatus, 41 

 Internal auditory fenestra, 129 

 Internal branchial arches, 134 

 Internal carotid artery, 347, 354 



cavernous portion, 354 



portal, 40 

 Internal gill, 287 

 Internal jugular vein, 360 

 Internal maxillary artery, 354 

 Internal nares, 85 

 Internal oblique muscle, 281 

 Internal rectus muscle, 422 

 Interopercle, 106 



origin of, 115 

 Interorbital septum, 53, 54, 108 

 Interosseus muscles, 433 

 Interpapillary peg of dermal papilla, 218 

 Interparietal, 36 



Interpterygoid fenestra, 64 

 Interpterygoid fontanelle, 86 

 Interramal area, 94 

 Interrenal body, 381, 382 

 Intersclerotomic fissure, 143 

 Intersegmental fissure, 143 

 Intertemporal, 85, 96, 105, 106, 114 

 Interventricular septum, 339 

 Intervertebral body, 148 

 Intervertebral disc, 144 

 Intestinal blood vessel, 16 

 Intestine, 8, 11, 13, 16, 253 



ciliated groove, 13 

 Intraintestinal vein, 370, 375 

 Intrasegmental, sclerotomic, fissure, 143 

 Intrinsic muscles, 424 

 Invagination, 195, 199 

 Involution, 199,201,205 

 Iridocytes, 226 

 Iris, 404 



Irregulanaspjs, 4 1 1 

 Ischial process, 180 

 Ischium, 171, 176 

 Isinglass, 284 



Islets of Langerhans, 266, 382 

 Isocercal tail, 26, 168, 769 

 Isolecithal egg, 193, 194, 194, 198 

 Isopedine, 234 

 Isthmus, 23, 288, 289 

 Isthmus, of Miillerian duct, 325 



Jacobson's organ, 53, 56, 69, 76, 388, 402, 



403 

 JARVIK, 3, 92, 104, 128, 155, 242 

 Jarvikia. form B, 155, 158 

 Jaws, origin from branchial arch, 128 

 Jaw suspension types, see autostylic, 1 19 

 Jejunum, 253 

 Jelly coats, 199 

 Jena Nomina Anatomica, 34 

 Joints, 41 



Jugal, 38, 43, 46, 76, 85, 105 

 Jugal division of mandibular sensory-canal 



line, 410 

 Jugular foramen, 51, 61 

 Jugular ganglion of vagus nerve, 387 

 Jugulohypoglossal canal, 57 

 Jurassic, 62 



Kangaroo, 141, 111,291.348 

 KELLICOTT, 370 

 Keratin, 218 



scales, 217, 221 



teeth, 249 

 KERR, 3, 266 



Kidney, 291, 292. 293, 296, 297, 299 

 KIELMEYER, 3 

 Kineticism, 61 

 Knowledge, half life, I 

 KOWALEVSKI, 5 

 Kujdanowmspis. 126 

 KUKENTHAL, 252 

 Kupffer's vesicle, 271 



Labia, 320 



Labial arch, 65, 76 



INDEX 



467 



