INDEX. 



Descending aorta, 284 



tracts, 40 



Desmognathous, 97 

 Deutoplasm, 8 

 Diaphragm, 123, 135 

 Diapophysis, 46 

 Diarthrosis, 38 

 Diastole, 272 

 Diencephalon, 142 

 Digastric muscle, 133 

 Digestive tract, 12, 205 

 Digitigrade, 120 

 Digits, 116 

 Dilator pupillae, 202 

 Diphy cereal, 50 

 Diphyodont dentition, 211 

 Dipnoi, brain, 154 



circulation, 292, 295 



excretory organs, 327 



lungs, 257 



reproductive organs, 333 



skull of, 80 

 Discus proligerus,, 320 

 Dorsal aorta, 275 



fissure of cord, 139 



nerve root, 161 



vertebrae, 49 

 Down feathers, 31 

 Dromseognathous, 97 

 Ductless glands, 18 

 Ductus arantii, 277 



arteriosus, 283 



Botalii, 283 



Cuverii, 271, 278 



venosus, 277 

 Dumb-bell bone, 69, 101 

 Duodenum, 227 

 Dura spinalis, 152 



Ear, 182 



bones, 73 



external, 187 



functions of, 188 



inner, 183 



middle, 187 



stones, 1 86 

 Ect-ental line, 9 

 Ectethmoid, 67 

 Ectobronchus, 259 

 Ectochondrostosis, 43 

 Ectoderm, 9 

 Ectopterygoid, 80, 88 

 Ectoturbinals, 196 

 Efferent branchial artery, 274 



duct of gills, 238 



nerve root, 161 

 Egg, segmentation of, 8 



teeth, 216 



Ejaculatory duct, 341 

 Elasmobranchs, brain, 153 



copulatory organs, 343 



excretory organs, 326 



gills, 239 



Elasmobranchs, girdles of, 105 



intestine, 228 



reproductive organs, 331 



skull, 76 

 Elastica externa, 45 



interna, 44 

 Elastic tissue, 22 

 Electrical organs, 135 

 Electric plates, 135 

 Electroplax, 136 

 Embolomerous, 48 

 Embryology, i, 6 

 Embryonic tissue, 22 

 Eminentia median's, 145 

 Enamel, 40 



organ, 40, 209 

 Endocardium, 269 

 Endolymph, 185 



duct, 183 



sac, 183 



End organs, 178 

 Endorhachis, 151 

 Endoskeleton, 38, 42 

 Ensiform process, 56 

 Entepicondylar foramen, 120 

 Enteroccele, 10 

 Enteropneusta, 2 

 Entobronchus, 259 

 Entochondrostosis, 43 

 Entoderm, 9 

 Entoglossal, 80, 97, 218 

 Entoplastron, 42, 159 

 Entopterygoid, 80 

 Entoturbinals, 196 

 Entovarial canal, 326 

 Envelopes of nervous system, 151 

 Eparterial bronchi, 262 

 Epaxial muscles, 127 

 Ependyma, 139 

 Epibranchial cartilage, 65 

 Epibranchial ganglia, 176 



muscles, 133 

 Epicardium, 124, 269 

 Epicoele, 143 

 Epicoracoid, 107 

 Epidermis, 25 

 Epididymis, 322 

 Epigastric artery, 288 



vein, 289 



Epiglottis, 252, 253 

 Epimerals, 54 

 Epimere, 13 

 Epineurals, 54 

 Epiotic, 67, 69 

 Epipharyngeal bones, 80 

 Epiphyses, 43 

 Epiphysial structures, 146 

 Epiphysis, 147 

 Epiplastron, 42, 108 

 Epipleurals, 54 

 Epipterygoid, 82 

 Epipubis, in 

 Episternalia 109 



