946 



INDEX 



Deutoplasm, 76. 

 Development of Amphibia, 84. 

 • — of Amphioxus, 525. 



— of Amielids, 262. 



— of Anodonta, 454. 



— of Ascidia, 506. 



— of Astacus, 359. 



— of Balanoglossus, 495, 495. 



— of Chaetognatha, 281. 



— of chick, 764, 766. 



— of crab, 359. 



— of crayfish, 334, 334. 

 — • of Crustacea, 357. 



— of Dipnoi, 648. 



— of earthworm, 254. 



— of Echinoderma, 314. 



— of eye, 553. 



— of feather, 734. 



— of frog, 670. 



— of Gasteropoda, 477. 



— of haddock, 626. 



— of hair, 812. 



— of Homarus, 359. 



— of Hydra, 179. 



— of Insects, 395, 396. 



— of Mammalian teeth, 814, 



— of Mammals, 817. 



— of Nemerteans, 232. 



— of Penaeus, 359. 



— of Peripatus, 365. 



— of Petromyzon, 583. 



— of placenta, 821. 



— of Polychasta, 262. 



— of Reptilia, 717. 



— of scorpion, 416. 



— of sea-anemone, 195. 



— of skate, 607. 



— of skull, 534. 



— of Sponges, 161. 



— of teeth, 814. 



— of Tunicata, 506. 



— of Vertebrata, 531. 



— arrested, 46. 



— in plants and animals, resemblances in, 



23. 

 Diadema, 209. 

 Diapedesis, 665. 

 Diaphragm, 778, 809. 

 Diastema, 784. 

 Diastylis, 350. 

 Diatoms, pigment of, 138, 

 Dibothriocephalus, 229. 

 Dibranchiata, 485, 486. 



— and Tetrabranchiata compared, 485. 

 Dichogamy, 64. 



— in Tunicates, 505. 

 Dicotyles, 849. 

 Dicotylidae, 849. 

 Dicyema, 462. 



— a young, 165. 

 Dicyemidae, 166. 

 Dicynodon, 720. 

 Didelphia, 3, 837. 

 Didelphydidae, 839. 

 Didelphys, 840. 

 Differentiation, 42, 43. 



Differentiation of organs, 85. 

 Digestion, 30. 



— in amoeba, iii, 112. 



Digestive processes of Vertebrates and 



Invertebrates compared, 31. 

 Digitigrade, 870. 

 Dimorphism, 170. 



— of sexes, 63. 



— 7— in Bonellia, 269. 



— in Insects, 403. 



— in Spider, 418, 422. 

 Dinoceras, 860. 

 Dinoflagellata, 133. 

 Dinophilus, 270. 

 Dinornis, 770. 

 Dinosauria, 720, 722. 

 Dinotherium, 860. 

 Diodon, 627. 

 Diphycercal, 631. 

 Diphyes, 205. 



Diphyodont dentition, 815. 

 Diploblastic, 153, 175. 

 Diplopoda = Millipedes, 368, 369. 

 Diplotrophoblast, 823. 

 Diplozoon, 222. 

 Dipneumones, 420, 422. 

 Dipnoi, 6, 547, 641. 



Diporpa, 222. 

 Diprotodon, 842. 

 Diprotodontia, 839. 

 Diptera, 384, 406. 

 Dipterus, 642. 

 Dipylidium, 229. 

 Direct division, 56. 

 Discoidal segmentation, 81. 

 Discomedusae, 205. 

 Discophora, 244, 271, 278. 

 Discus proligerus, 817. 

 Distomum, 65, 216. 

 Distribution, geographical, 895. 



— geological, 103. 



— of Fishes, 630. 

 Division of labour, 22. 

 Dochmius, 239. 



Doctrine of descent, 105, 908. 

 Dodo, 774. 

 Dog, 872. 



— brain of, 870. 



— dentition of, 817. 



— skull of, 869. 



Dogfish, 609, 634. {see Acanthias), 

 Dogwhelk, 441, 474, 476. 

 Dolabella, 474. 

 Dolichoglossus, 490, 491. 



— development of, 494. 

 Dolichosaurus, 720. 

 Doliolum, 610, 511, 514. 

 Dolphin, 860. 

 Dominant characters, 91. 

 Donatia, 160. 

 Donkey, 856. 

 Dorcatherium.. 850, 851. 

 Doris, 469, 474. 



Dorsal axis of Chordata, 573. 

 Dourine, parasite of, 147. 

 Dove, wing of, 743. 



