832 
Differentiation . 
Digestion . . 
Digitigrade . ‘ ‘ 
Dimorphism of sexes. 
Dinoflagellata 
Dinophilus . 
Dinornis 
Dinosauria 
Dinotherium 
Diphycercal . 
Diphyes : 
Diphyodont dentition 
Diploblastic . Z 
Diplopoda = Millipedes . 
Diplotrophoblast . 
Diplozoon  . : ‘ 
Dipnoi . . . 
Diporpo . . 
Diprotodon . 
Diprotodontia - 
Diptera i . . 
Dipterus . 
Direct division . 
Discoidal segmentation . 
Discomedusze ‘ 
Discophora . ‘ 
Discus proligerus . . 
Distomum 
Distribution, geographical 
as geological . 
Division of tabour 
Dochmius  . 5 
Doctrine of descent 
Dodo 
Dog . 
Dogfish 
Dogwhelk 
Doliolum is 
Dolphin . : 
Donkey F 
Dorcatherium 
Doris . . . 
Draco . . 
Dracunculus . 
Dragon-flies . 
Dreissensia . 
Drepanophorus 
Dromeognathous . 
Dromeus . 
Dromia . ° 
. ‘ 
ee eee 
205, 
84, 
INDEX 
Duckmole . . ¥ 
Ductus botalii 
‘3 endolymphaticus 
Dugong . 
Duodenum 
Duplicidentata 
Dura mater . ; ‘ 
Ear of Arenicola . 
» of crayfish 
», Of Myxine . Z 
» of pe aa ‘ 
Earthworm . ‘ 
Earwigs 
Ecaudata 
Ecdysis or moulting 0 of Ar- 
thropods . 
Echidna ¥ 
Echinococcus 3 
Echinoderma 
a contrast between 
the classes of. . 
Echinoidea . 
Echinorhynchus 
Echinus 
Echiuridz 
Ectoderm 
Ectoplasm 
Ectoprocta . 
Edentata. 
Edible bird’s nest . 
Edrioasteroidea . : 
Egg-case of skate . 
>» cell ; ‘ 
Eggs of Birds . 
Elasipoda_. 
Elasmobranchii 
Electric organs 
Eledone i ‘ 
Elephant’s tooth shells . 
Elephas ‘ 
Elginia . . 
Elimination . a 
Elpidia 2 . . 
Embolé 5 ‘ ‘ 
Embryology . 
Emu . 
Enaliornis i 
Enamel F % ‘ 
Encystation . . 2 
