452 



Index 



D1PYLIDIUM CANINUM, dipeli'dium 



(G. dipylos, with two gates) 291 



Latum 302 



DISCOIDAL, SEGMENTATION, defini- 

 tion of 106 



DISCOIDES, diskoi'des (G. diskoeides, 



disk-shaped) 149 



DISCOMEDUSAE, discomedu'sfi (G. 

 diskos, a disk + L. medusae, me- 

 dusa) 422 



An order of Scyphozoa in which 

 umbrella is disk shaped. 



DISCRIMINATION, definition of 176 



DISSECTION OF FROG 48 



DISSEPIMENTS, disep'iments (L. dis, 



apart; saepire, to hedge in) 267 



DISSIMILATION, definition of 126 



DISTAL, dis'tal (L. dis, apart; stare, 



to stand ) , definition of 76, 249 



DISTENSIBLE 65 



DISTILLATION 38 



DISTOMA BUSKI (G. dis, two + 



stoma, mouth ) 294 



A name for the various genera of 

 Trematoda. 



Felineus 293 



Sinensis 293 



DISTOMUM CONJUNGTIVUM 294 



DISTRIBUTION, dis'tribu'shun (L. 

 dis, apart; tribuere, to allot), geo- 

 graphical, definition of 32 



DIVISION OF LABOR, divizh'un (L. 

 dividere, to divide), definition of... 121 



DOCILITY, definition of 176 



DOMINANCE, definition of 164 



DORSAD, definition of. (See prefixes 

 and suffixes at top of Index-Glos- 

 sary. ) 

 DORSAL AORTA, dor'sal (L. dorsum,- 



back) 48 



DORSO-VENTRALITY, definition of . .266 

 DRACUNCULU 8 MEDINENSIS, 

 drakung'lmlus (L. little dragon) .. .306 

 A genus of Nematode parasites. 

 DREPANIDOTAENIA SETIGERA.. .299 



DRONE 354 



DUALIST IN PHILOSOPHY 175 



DU BOIS-REYMOND 381 



DUCT OF GALL BLADDER AND 



PANCREAS (L. ducere, to lead) 48 



DUMAS 381 



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



deni, twelve ) 48, 49 



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



dura, hard; mater, mother) 67 



DYAD, diad (G. dyas, two) definition 



of 102 



EAR DRUM OF FROG 45 



EARTHWORM 263, 285 



Behavior 282 



Circulatory system 270 



Digestive system 268 



Embryology 280 



Excretory system 273 



External appearance 265 



Grafting 283 



Internal structure 267 



Nervous system 274 



Oogenesis 279 



Regeneration 283 



Reproductive system 276 



Respiration 273 



Sense organs 276 



ECDYSIS, ek'disis (G. ek, out; dyein, 



to enter), definition of 331 



ECHINODERMATA, ekinoder'mata 

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



derma, skin) 430 



Radially symmetrical, spiny- 

 skinned sea animals. 

 ECHINOIDEA, ekinoi'dea (G. echinos, 

 a hedge-hog + eidos, form) . . . .422, 431 



A class of Echinodermata such as 

 the sea urchin and sand dollar. 

 ECH1NORHYNCHUS, ekinoring'kus 



(G. echinos + rhynchos, snout) . . . .307 

 ECHWROIDEA, ekiuroi' dea (G. echis, 



adder + oura, tail + eidos) 311 



ECHIURUS PALLASI, ekiu'rus (G. 



echis + oura ) 312 



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



logos, discourse) 32 



The study which deals with the 

 relationship between organisms and 

 their surroundings. 

 ECONOMIC BOTANY, definition of... 32 



Zoology 32 



ECTOBLAST, ek'toblast (G. ektos, 



outside; blasios, bud) 



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

 side; derma, skin), definition of.... 107 

 ECTOPLASM, ek'toplazm (G. ektos, 

 outside : plasma, something moulded) . 



311 



The external layer of protoplasm 

 in a cell, usually slightly modified. 

 ECTOPROCTA, ektoprok'ta (G. ektos, 



+ proktos, anus), definition of 311 



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

 side; sarx, flesh), definition of 122 



EDENTATA, e'denta'ta (L. e, without 



-f dens, tooth) 423 



EDUCATION 32 



EDWARDSIIDEA, edwardzi'ide (named 

 after Henry Milne-Edwards, a French 



naturalist) 422 



An order of Zoantharia. 

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



gerere, to carry) 30, 63 



EGGS, OF PARASITIC WORMS.... 302 



Frogs 44 



ELMER 405 



EJACULATORY DUCT IN EARTH- 

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

 jacere, to throw) 273 



