INDEX 



911 



DORSU YEXTKALITY. definition of. .:>(!f> 

 DOUBLE CIRCULATION, definition 



of 535 



DRACUN CU LU S MEDINENSIS, 



drakung'kuliis (L. little dragon )... 305 



A genus of Nematode parasites. 

 DREPANIDOTAENIA SETIGERA ... 298 



DRONE 353 



DUALIST IN PHILOSOPHY 174 



DU BOIS-REYMOND 380 



DUCK-BILL 65IJ 



DUCT OF BOTALLUS, dukt (L. 



ducere, to lead), definition of 531 



of gall bladder and pancreas. ... ^8 



DUCTLESS GLANDS 751 



DUCTUS BOTALLI 531, 596 



Cuvieri 501 



Venosus 501 



DUGUNG '...661 



DUMAS 380 



DUODENAL LOOP, definition of 590 



DUODENUM, diu'ohdee'num (L. duo- 



deni, twelve ) !f8, 49 



DURA MATER, diu'rah mah'ter (L. 



dura, hard; mater, mother) ... .67, 838 

 DYAD, diad (G. dyas, two), definition 



of 102 



EAR 



External 869 



Inner 867 



Middle 869 



Of locust 336 



Stones 868 



EAR BONES OF MAMMALS 807 



EAR DRUM OF FROG 45 



EARTHWORM 262-284 



Behavior 281 



Circulatory system ' 209 



Digestive system 267 



Embryology 279 



Excretory system 272 



External appearance 264 



Grafting 283 



Internal structure 266 



Nervous system . 273 



Oogenesis 279 



Regeneration 282 



Reproductive system 275 



Respiration 272 



Sense organs 275 



ECDYSIS, gkdi'sis (G. ek, out; dyein, 

 to enter ) , definition of 330 



ECHIDNA ACULEATA, ekid'nfi (L. 



echidna, an adder ) 656 



Hy striae 656 



ECHIDNIDAE, ekid'nide (L. echidna 

 + G. eidos) 657 



ECHWNODERMATA, ekmoder'mata 

 (G. echinos, a sea hedge-hog -(- 

 derma, skin) . . 428 



Radially symmetrical, spiny- 

 skinned sea animals. 



UCHINOIDEA, ekinoi'dea (G. echinos, 

 a hedge-hog + eidos, form) . . .420, 428 



A class of Echinodermata such as 

 the sea urchin and sand dollar. 



HCHINORHYNCHUS, ekmoring'kus 

 (G. echinos + hynchos, snout) 306 



ECHIUROIDEA, ekiuroi'dea (G. echis, 

 adder + oura, tail + eidos) 310 



EGHIURUS PALLA8I, ekiu'rus (G. 

 echis -\- oura ) 31 1 



ECOLOGY, ekol'oji (G. oikos, house; 



loyos, discourse) 31 



The study which deals with the 

 relationship between organisms and 

 their surroundings. 



ECONOMIC BOTANY, definition of . . 32 

 Zoologv 32 



ECTOBLAST, ek'tdblast (G. ektos, 

 without; blastos, bud) 



ECTOCHONDROSTOSIS, ek'tokondros- 

 to'sis (G. ektos, without; chondros, 

 cartilage; osteon, bone), definition 

 of 681 



ECTODERM, ek'toderm (G. ektos, out- 

 side; derma, skin), definition of.... 106 



ECTOPLASM, ek'toplazm (G. ektos, 

 outside ; plasma, something moulded ) . 



310 



The external layer of protoplasm 

 in a cell, usually slightly modified. 



ECTOPROCTA, ektoprok'ta (G. ektos, 

 -\- proktos, anus), definition of 310 



ECTOSARC, ek'tosark (G. ektos, out- 

 side; sarx, flesh), definition of 121 



EDENTATA, ee'dentay'tah (L. e, with- 

 out; dens, tooth) 426, 658 



EDUCATION 32 



EDWARD8IIDEA, edwardzl'ide (named 

 after Henry Milne-Edwards, a French 



naturalist ) 420 



An order of Zoantharia. 



EEL '.(/.'/.$ 



EFFERENT DUCTS, definition of . . . .610 



EFT 6J8 



EGESTION, ejes'chun (L. ex, out; 

 gerere, to carry) 30, 63 



EGG AXIS (Icel. egg), definition of.. 553 



Tooth, definition of 737 



EGGS, OF PARASITIC WORMS 301 



Frogs 44 



EIMER 404 



EJACULATORY DUCT IN EARTH- 

 WORM, ejak'ulatory (L. ex, out; 



jacere, to throw) 272 



ELASMORRANCHII, eelas'mowbran'- 

 kee-eye (G. elasmos, plate; branchia, 



gills) 424, 641 



ELASTIC SHEATHS, definition of... 612 



