INDEX 



689 



Darwinian theory, 629 



Dasypodidce, 465 See Armadillos 



Dasyprocta, 492 



Dasypus sexcinctus, 484, 510, 511, 512, 

 513, 516 



Dasyures, 464, 480 



Dasyuridcs, 464, 479, 506, 508, 547, 577 



Dasyurus, 508, 577 



Dasyurus viverrinus, 480 



D'Azyr, V., 653 



Decidua, 462, 576 



Deciduate placenta, 462, 576 



De Bary, 659 



Deer, 468, 487 



Deer, Red, 520, 525, 526, 527 



Delphinus, 466, 486, 543, 544 



Deltoid ridge, 442* 



Demersal eggs, 235* 



Dendrohyrax, 469 



Dental formula, 545* 



Dental groove, 541, 542 



Dental lamina, 541, 542 



Dental papilla, 83, 84*, 541, 542 



Dental sac, 542* 



Dentary, of Craniata, 77, 80* 



Dentine, 83*, 84 



Dentine -forming layer, 542* 



Dentition See Teeth 



De Perthes, B., 665 



Depressor muscles, 267* 



Dermal defences, 184 



Dermal fin -rays, 80* 



Dermal teeth, 140, 222 



Dermatochelys, 336, 357, 358 



Dermis, of Amphioxus, 45 : Craniata, 

 67 



Derotremata, 284*, 287 



Desmognathous arrangement, 415* 



Determinants, 668 



Development, of Balanoglossus, 7, 8, 

 9 : Ascidian, 30, 31, 32, 33, 34, 35, 

 36, 37 : Pyrosoma, 37 : Doliolum, 

 38, 39 : Salpa, 40 : Amphioxus, 55- 

 62: Craniata, 117, 118: Lamprey, 

 130, 131, 132, 133 : Elasmobranchii, 

 176, 177, 178, 179, 180, 181 : Holo- 

 cephali, 190, 191 : Trout, 209, 210 : 

 Teleostomi, 234, 235 : Ceratodus, 

 247, 248, 249 : Frog, 279, 280, 281, 

 282, 283 : Amphibia, 300, 301, 302 : 

 Reptilia, 351, 352, 353, 354 : Aves, 

 422^29 : Rabbit, 461, 462 : Mam- 

 mals, 567-579 



Devonian period, 619 



Diacoele, 97 



Diaphorapteryx, 605 



Diaphragm, of Craniata, 70* : of 

 Rabbit, 445 



Diastema, 445 



Diazona, 22 



Dicotyles, 468, 580 



Didelphyidce, 464, 478, 479, 480, 506, 

 507, 546, 547, 565, 566, 577, 579, 

 583, 609, 613 



Didelphys dorsigera, 566 



Didelphys marsupialis, 546, 547 



Didelphys virginiana, 480 



Dididce, 404 



Didunculus, 612 



Didus, 404, 417, 431 



Diencephalon, of Craniata, 97* 



Diffuse placenta, 576* 



Digestive system, of Balanoglossus, 4, 

 5, 6 : Ascidia, 18 : Appendicularia, 

 24, 28 : Simple Ascidians, 24, 28 : 

 Composite Ascidians, 28 : Salpa, 28 : 

 Doliolum, 28 : Craniata, 82 : Lam- 

 prey, 124 : Myxine, 136, 137 : 

 Dogfish, 147, 148, 149 : Elasmo- 

 branchii, 172 : Holocephali, 186 : 

 Trout, 204, 205 : Teleostomi, 226, 

 227 : Ceratodus, 243 : Frog, 268, 

 269 : Amphibia, 295 : Lizard, 313, 

 314 : Reptilia, 345, 346 : Pigeon, 

 383, 384, 385 : Aves, 420, 421 : 

 Rabbit, 445, 446, 447 : Mammals, 

 541-557 



Digitals, 373* 



Digitigrade, 364* 



Digits, 67 -See Limbs 



Dingo, 580, 611 



Dinoceras, 588 



Dinornis robustus, 418, 621 



Dinornithes, 398*, 417, 423, 429 



Dinornithidas, 398, 429 



Dinosauria, 326*, 362, 363, 364 



Dinotheridce, 587 



Dinotherium giganteum, 587 



Diomedea, 402, 417, 422 



Diphycercal fin, 184*, 223 



Diphyodont, 463* 



Diploblastic forms, 597 



Dipneumona, 250* 



Dipnoi, 64*, 239 : Example, 239 : Dis- 

 tinctive characters and classification, 

 249, 250 : General remarks, 250 



Dipodidce, 470, 531, 532 



Diprotodon australis, 583, 584, 621 



Diprotodont, 545 



Diprotodontia, 465*, 481, 482, 483, 583 



Dipterus, 252 



Dipu8 t 492 



Discoidal placenta, 576 



Dispersal, 606 



Distalia, of Craniata, 80, 81* 



Distinctive characters and classifica- 

 tion, of Acrania, 62, 63 : Craniata, 

 64, 119 : Cyclostomata, 133 : Elas- 

 mobranchii, 161 : Teleostomi, 211 : 

 Dipnoi, 249 : Amphibia, 283 : Rep- 

 tilia, 323 : Aves, 395 : Mammals, 

 462 



