738 



Crossopterygii, 346 582, 713 

 Crown of tooth, 362 

 Crura cerebri, 386, 461 

 Crus, 418 

 Crustacea, 219 

 Crystalline style, 276 



cone, 214 

 Ctenidia, 284 

 Ctenophora, 117 

 Cubitals, 394 

 Cuckoo, 149 

 Culex, 76, 145. 242 

 Cursorial, 558 

 Cuticle, 37 



of Arthropoda, 219 

 of Ascaris, 136 

 of crayfish, 195, 198 

 of earthworm, 160 

 of insects, 226 

 of leech, 181 

 of Polytoma, 37 

 Cuticulin, 227 

 Cuttlefish, 285 

 Cuvier, G., 709 

 Cuvierian sinus, 605 

 Cyanea aurita, 114 

 Cyclops, 221 

 Cyclostomata, 543 

 Cypris, 220, 221 

 Cyst of Amceba, 34 

 of Cercaria, 125 

 of Entamoeba, 63, 65 

 of Monocystis, 44 

 of Opalina, 61 

 of Polytoma, 38 

 of TricMnella, 145 

 Cysticercus, 128, 129, 133 

 Cytophore, 173 

 Cytoplasm, 499 

 Cytoplasmic inheritance, 704 



Dactylopodite, 197 

 Daddy-long-legs, 260 

 Dama dama, 494 

 Daphnia, 220, 221 

 Dart sac, 269 

 Darwin, C. R., 709 

 Darwin, E., 709 

 Dauermodificationen, 705 

 Dasyurus, 495 

 Deamination, 8 

 Death, 34, 499, 500. 50i 

 Deer, 492 

 Degrowth, 131 

 Delamination, 649 

 Delhi boil, 67 

 Deltoid ridge, 358 

 Deme, 724 



INDEX 



Demodex folliciilorum, 224 

 Dendrites, 511 

 Dendroccelum lacteum, 132 

 Dendrons, 511 

 Dental formula, 440 

 Dentalium, 284 

 Dentine, of teeth, 362, 520 

 Depression — 

 in Amceba, 31 

 in Hydra, 98 

 in Paramecium, 55 

 Dermaptera, 249 

 Dermis, 348, 527, 628 

 Dermotrichia, 320, 321 

 Determination of sex, 679, 701 

 Deutoplasm, 499 

 Development, 4, 620 

 of birds, 644 

 of crayfish, 671 

 of dogfish, 336 

 of earthworm, 670 

 of frog, 629 

 of Hydra, 100 

 of invertebrates, 670 

 of lancelet, 620 

 of liver fluke, 125 

 of mammals, 663 

 of man, 668 

 of Obelia, 107 

 of swan mussel, 670 

 See also Life-history 

 Diabetes, 471 

 Diakinesis, 694 

 Diapedesis, 525 

 Diaphragm, 420, 446 

 Diapsid, 579 

 Diarrhoea, 140, 150 

 Diarthrosis, 539 

 Diastema, 440 

 Diastole, 31 

 Didelphis, 496 

 Diencephalon, 608 

 Differences between animals. 16 

 animals and plants, 19 

 parents and offspring, 3 

 Diflerentiation, 16, 673 

 Difflugia, 80 

 Digestion, 7 

 external, 223 

 in Amoeba, 29 

 in cockroach, 233 

 in crayfish, 205 

 in earthworm, 162 

 in frog, 366 

 in Hydra, 98 

 in lancelet, 305 

 in mussel, 276 

 in Paramecium, 49 



