792 



INDEX. 



Diplopoda = Millipedes, . 292 

 Diplotrophoblast, . . .651 

 Diplozoon, . . . .170 

 Dipneumones, . . 333, 336 

 Dipnoi, . . . . -5ii 

 Dipodidae, . . . .711 

 Diprotodon, . . . .688 

 Diptera, .... 304 

 Dipterus, . . . .511 



Dipus, 711 



Direct division, ... 45 



Discoidal segmentation, . 65 



Discomedusae, . . .156 



Discophora, . . . .213 



Distomum, . . . .164 



Distribution, Geographical, . 753 



,, of Lemurs, . 722 



,, of Marsupials, . 684 



,, of Tapirs, . . 700 



Geological, . 74 



Division of Labour, . .15-16 



Dochmius, . . . .183 



Doctrine of Descent, . 81,765 



Dodo, 618 



Dog, 715 



Dogfish, .... 506 

 Dogwhelk, . . . 357 

 Dolabella, . . . '357 

 Doliolum, . . .401, 409 

 Dolphin, .... 709 

 Donkey, . . . .701 

 Dorcatherium, . . . 696 

 Doris, ..... 357 

 Dormouse, . . . . 711 

 Dorsal lamina of Tunicate, . 404 

 Draco, ..... 577 

 Dracunculus, . . . .184 

 Dragonet, .... 520 

 Dragon-flies, .... 305 

 Dreissena, .... 372 

 Drepanidium, . . .104 

 Drepanophorus, . . .176 

 Dromaeognathse, . . . 620 

 Dromseus, . . . .619 

 Dromatherium, . . . 640 

 Dromia, .... 279 



Duckmole, . . . 68 1, 682 

 Ductus endolymphaticus, . 444 

 Dugong, . . . .691 

 Duodenum, . . . . 670 



Duplicidentata, 

 Dura mater, . 



Ear of Arenicola, . 

 , , Crayfish, 

 ,, Myxine, 

 ,, Vertebrates, 



Earthworm, 



PAGE 



. 711 



439 



. 203 

 . 260 

 . 467 

 . 444 

 . 187 



Development of, 196-201 

 Structure of, 187-196 

 Earwigs, .... 305 

 Ecardines, .... 226 

 Ecaudata, .... 555 

 Ecdysis or moulting of Ar- 

 thropods, . . . 254 

 Echidna, . . . .681 

 Echinochrome, . . . 238 

 Echinococcus, . . .173 

 Echinoderma, . . 7, 227 

 ,, Contrast between the 



classes of, . .251 



,, Development of, . 247 



,, General characters of, 227 



,, Larvae of, . . . 250 



,, Relationships of, . 250 



Echinoidea, .... 236 



,, Classification of, . 240 



Echinorhynchus, . . .185 



Echinus, . . . 236 



Echiuridae, . . .211 



Ectoderm, . . 36, 68 



Ectoplasm, . . .no 



Ectoprocta, . . . 225, 



Edentata, . . .688 



,, Families of, . . 689 



Edriophthalmata, . . . 276 



Eel, 510 



Egg case of Skate, . . 493 



Egg cases of Buccinum, lan- 



thina, Purpura, . . 356 



Eggs, see Ova, ... 56 



,, of Birds, . . . 627 



Eimeria, . . . .104 



Elaps, 583 



Elasipoda, .... 243 

 Elasmobranchii, . . 477, 505 

 Electric organ of Skate, . 478 

 ,, organs of Teleostei, . 478 

 Eledone, .... 386 

 Elephant's tooth shells, . . 362 



