ibjecl l.ul. 



;;:;:} 



Dermoptera, 736, 737, 774, 776 



Descartes, 227 



Descending fibers, 154, 169, 170 



Desmognathus, 452 



Determinants, 365 



Deuterostomians, 391, 393 



Deutoplasm, 233 



Development, 236, 237, 239, 240, 243, 



246-299 

 Devonian, 789 



Diacoele, 149 (see also Ventricle, third) 

 Diaphragm, 22, 213 

 Diaphysis, 598 

 Diapsid skull, 501, 502 

 Diastema, 739 

 Dicamptodon ensatus, 454 

 Dicotyles, 754 



Didelphis virginiana, 731, 733 

 Didus ineptus, 551 

 Diencephalon, 6, 144, 145, 147, 148, 149, 



215, 227, 710 

 Diet, 569, 805 (see also Food) 

 Differentiation theory, 53 

 Diffuse placenta, 293 

 Diffusion, 155, 156 

 Digastric muscle, 92 

 Digestion, 155, 174 



of starch, 637 

 Digestive cavity, 267, 274 



epithelium, 23, 27, 258, 274, 281, 303 



passage, 199 



tube, 13, 25-35, 96, 136, 155, 174, 213, 

 241, 270, 281, 285, 288 (see also 

 Alimentary tube, Alimentary 

 canal) 

 Digitigrade condition, 583 

 Digits, 132 

 Dilator fibers, 286 

 Dingo, 565, 750 

 Dinornis, 347, 554 

 Dinosaurs, 499, 500 

 Dioecious, 233 

 Diphyodont, 54, 55, 635 

 Diplospondyly, 111 

 Dipnoi, 198, 426, 437-439 

 Diprotodontia, 735 

 Directions, 12, 13 

 Discoidal placenta, 294 

 Disks, intercalated, 315, 316 



intervertebral, 597 

 Ditremata, 729 

 Divergence, 794 

 Diverticulum, hepatic, 275 

 Division of labor, 297 

 Dodo, 551 

 Dog, 54, 563, 601, 637, 703, 706, 747 



Australian, 565, 751 

 Dogfish(es), 6, 11, 93, 146, 233, 289, 308, 

 356, 376, 42-2 



and mammal, spiracle and ear, 357- 

 359 

 Doliolum, 400, 401 

 Dolphins, 56, 765 

 Domestic fowl, 234, 530 



Dorsal, 13 (see under noun entries) 



Dorsal-parietal axis, 138 



Double-tubular structure, 23, 154, 155, 



156, 158 

 Dove(s), 229, 551 

 Down-feathers (plumules), 507, 510 



nestling, 507 



powder, 507, 509 

 Draco volans, 800 

 Dromatherium, 45 

 Dromedary, 755, 757 

 Dromiceius, 543 

 Duckbill, 236, 238, 242, 270, 726, 727, 



733 (see also Ornithorhynchus) 

 Ducks, 546 

 Duct(s), 281 



alveolar, 616 



bile, 14, 31, 32, 276 



of Cuvier, 73, 74, 631 



endolymphatic, 209, 211, 688 



genital, 238 



hepatic, 31 



hypophyseal, 224, 225 



lacrimal, 199 



mesonephric (Wolffian), 80, 81, 82, 83, 

 87, 88, 280, 650-656 



Mullerian, 80, 87, 88, 283 



nasolacrimal, 686 



nasopalatine, 475, 678 



pancreatic, 14 



primitive, 81, 83, 275, 277 



pronephric, 87, 279, 280 



of Santorini, 32 



sperm (see Vas deferens) 



Steno's, 636 



thoracic, 66 



urinary, 87 



urinogenital, 79-83, 87, 88, 154, 276, 

 283, 285, 474 



Wharton's, 636 



Wirsung's, 32 



Wolffian (mesonephric), 80, 81, 82, 83, 

 87, 88, 280, 283, 650-656 

 Ductus deferens (see Vas deferens) 



ejaculatorius, 651 

 Dugong, 294, 763 

 Duodenum, 14, 29, 215, 639 

 Duplicidentata, 742 

 Dura mater, 191, 192 

 Dwarf, ateliotic, 226 



E 



Eagle, 529, 546 



Ear, 103, 112, 116, 122, 125, 166, 167, 176, 

 207, 208, 273, 357, 419, 451, 456, 

 457, 534 



external, 696 



internal, 477, 689, 693 



of mammals, 688-701 



of man, 357, 694 



middle, 693 



vibration effects in, 697, 698 

 Eardrum, 693 



