670 



INDEX. 



Dinotheridae, 644 



Dinotherium, 644 



Dioecious, 118 



Diopatra, 313 



Diotocardia, 378 



Diphasia, 242 * 



Diphycercal fin, 41, 562 



Diphyes, 244, 245 



Diphyodont, 625 



Diploblastica, 230 



Diplocardia, 316 



Diplopoda, 459, 496 



Diploria, 261 



Diplospondyli, 570 



Diplozoon, 273 



Diplozoon, development of, 165 



Dipneumones, 453 



Dipneumonia, 579 



Dipneusti, 579 



Dipnoi, 579 



Diporpa. 165, 274 



Diprotodon, 634 



Diprotodonta, 633 



Diptera, 491 



Dipurena, 240, 242 



Dipylidium, 287, 289 



Direct development, 160 



Directive corpuscles, 140 



Directive spindle, 146 



Directives, 254 



Discina, 328 



Discodermia, 226 



Discodrilidae, 315 



Discoidal placenta, 634 



Discomedusae, 250 



Disconanthe, 245 



Discophori, 318 



Dispermy, 148 



Distaplia, 510 



Distichalia, 340 



Distichopus, 315 



Distomise, 274 



Distomum, 116, 272, 275, 276 



Distribution, 40 



Disuse, 55 



Division of labor, 72, 165 



Dobsons, 482 



Docoglossa, 378 



Docophorus, 479 

 Dodo, 614 



Dog-day harvest fly, 489 

 Dogfish, 569, 571 

 Dog, prairie, 639 

 Dog sharks, 571 

 Dogs, 647 

 Dolichonyx, 616 

 Doliolum, 512 

 Dolomedes, 453 

 Dolphins, 646 

 Dondersia, 358 

 Doridiidse, 382 

 Doris, 382 

 Doryphora, 485 

 Dorsal aorta, 548 

 Dorsal fin, 526, 562 

 Dorsal organ, 341 

 Draco, 599 

 Dragon flies, 479 

 Dranculus, 303 

 Dreissenia, 367 

 Drepanidotaenia, 289 

 Drills, 651 

 Dromseus, 613 

 Dromatherium, 632 

 Drum of ear, 544 

 Duck, 615 

 Duckbill, 632 

 Ducts, genital, 120 

 Ductus Botallii, 550 

 Ductus choledochus, 546 

 Ductus cochlearis, 543 

 Ductus ejaculatorius, 120 

 Dugong, 645 

 Duplicidentata, 639 

 Dynastes, 484 

 Dysmorphosa, 241 

 Dysodont hinge, 359 

 Dytiscidae, 484 



Eagles, 617 



Ear bones, 525 



Ear of vertebrates, 542 



Earth worms, 315 



Ear wig, 480 



Ecardines, 328 



Ecdysis, 399 



