762 



INDEX 



204 : 

 219 : 

 230: 



251) : 

 280 



Dermal cortex, 102*, 110 



Dermal pores, 347 



Dermaptera, 587 



Desmoscolecidce, 296 



Desmoscolex, 297 



Desmospongise, 103* 



l)eutomerite of Gregarina, 77 



Development, oLSi/con, 113, 114 : Sponges, 

 115: O'ulia, 129, 130: S^JtoUnn-, 141: 

 Trr-1n//;>i, 144: Anrelia, 160, 161, 

 162: Sea-anemone, 179: Hormiphora, 

 Dirytmiihi', 217, 218 : Rhopalura, 

 Planaria, 225 : Liver-Fluke, 229, 

 T'iii(i, 236: Platyhelmintlies, 

 Nemertinea, 272, 273 ; Asmri*, 

 Nematoda, 286, 287 : Cha?to- 

 gnatha, 295 : Brachionus nibens, 302 : 

 Rotifera, 309 : Bmjiila, 317 : Ecto- 

 procta, 325 : Phoroiii.t, 329, 330 : 

 Brachiopoda, 341 : Atiterina, 358, 359 : 

 Sea-urchin, 368 : Sea-cucumber, 372 : 

 Antetlon, 377, 398: Echinodermata, 

 396, 397 : JVt/W*, 413, 414, 415 : Lum- 

 Iricus, 425, 426: Chtetopoda, 442: 

 Gephyrea, 459, 460 : Hirudo, 475 : 

 Hirudiuea, 479: A jut*, 496: Astac-us, 

 515 : Crustacea, 551 : PeripafHx, 562, 

 563, 564. 565 : Myriapoda, 570 : Peri- 

 jtfaiitfa,560: Scorpion, 610 : Anodonta, 

 643 : Pelecypoda, 658 : Amphineura, 

 668 : Gastropoda, 698 : Scaphopoda, 

 706 : Cephalopoda, 744, 755 



Devonian, 7 



Diatfylix, 524, 543 



Dibranchiata, 736*, 737, 738, 740, 743, 744 



Dicer as, 651 



Dichyocysta, 86 



Dicytmu, 216, 217, 218 



Diryemidi?, 216, 217 



Didinium, 85 



DlDYMIU.M DIFFORJIE, 61, 62 



Didymograptus, 155 

 Differentiation, 21* 



J>ilfttt<ji(t, 48 



Digenetica, 238*, 250, 253, 256 



Digestion, intracellular, 31 



Digestive glands, 31 



Digestive system, 30 



Digestive system, of Param cerium, 86 : 

 Aiirtfin, 157, 158, 159 : Sea-anemone, 

 174, 175 : Hormiphora, 199, 200, 201 : 

 Phuiuria, 222, 223 : Liver-Fluke, 227 : 

 Platyhelminthes, 250, 251, 252 : Ne- 

 mertinea, 269: Ascaris, 278, 279: 

 Nematoda, 283 : Chtetognatlia, 293 : 

 Brachionus rubeiis, 300, 301 : Roiifera, 

 307: JJ/K/H/'t, 315, 316: Ectoprocta, 

 323 : Endoprocta, 326 : Phoronis, 329 : 

 Ma'jtUmna, 334 : Axit'riax, 353 : Sea- 

 urchin, 367 : Sea-cucumber, 371, 372 : 

 Aitttdon, 375: Echinodermata, 394: 

 Xi.rtit, 406, 407: Lnml>ri<-n*, 420: 

 Chtutopoda, 436: Xi/jtiiK-ulnn, 452, 



453 : Gephyrea, 457 : Hirwlo, 468, 

 469 : Hirudinea, 476 : Apu, 489, 490 : 

 Axtacus, 506: Crustacea, 547: Peri- 

 561 : ilyriapocla, 569 : Peri- 

 . 576: Insecta, 592 : Scorpion, 

 607,608: Arachnida, 618 : Anodonta, 

 636: Pelecypoda, 655 :' Amphineura, 

 665 : Triton, 676, 677 : Gastropoda, 

 692: Scaphopoda, 706: Sepia, 712, 

 713, 714, 715 : Xautiln*, 730, 731 : 

 Cephalopoda, 743 

 Dimorpha, 66, 67 

 Dimorphic zooids, of Ciliata, 89 

 Dimorphism, sexual, 38* 

 Dinobryon, 66 



Dinoflagellata, definition, 65 : Charac- 

 teristic features, 73 

 Dinophilea, 310 

 Dinoji/ii/ti*, 482 

 Diu'cious, 38 

 Diojthn/s, 83 

 Diphyes, 152, 153 

 Diptomita, 66 

 Diplonephridia, 439* 

 Diplopoda, 567, 569, 57< > 

 I)iplo~oou, 258 



Diptera, 585, 589, 596, 598, 602, 605 

 Directive mesenteries, of Sea-anemone, 



176 



Distinct, 337, 339 

 Discoidal segmentation, 610 

 Discomedusae, 164*, 169, 170 

 Dixcorhhia, 53 

 I >ix<-o*oma, 195, 197 

 Dissepiments, 192* 



Distinctive characters See Classification 

 DISTOMUM HEPATICUM, 226 : General 

 features, 226 : Body-wall, 226, 227 : 

 Digestive system, 227 : Water-vessels, 

 227 : Nervous system, 228 : Repro- 

 ductive organs, 228, 229 : Develop- 

 ment, 229, 230 : Systematic position, 

 238 



Diatom-urn heputicum, 265 

 D. rathousii, 265 

 D. ni>it><xf, 265 



Distribution, 8: of Sponges, 113: Hydro- 

 coralliiict, 147 : Scyphozoa, 171 : Ac- 

 tinozoa, 196 : Ctenophora, 211 : Platy- 

 lielminthes, 263 : Ectoprocta, 326 : 

 Urachiopoda, 342 : Gephyrea, 461 : 

 Hirudinea, 481 : Onychophora, 566 : 

 Pelecypoda, 661 : Amphineura, 670 : 

 Gastropoda, 704 : Cephalopoda, 749 

 Distribution, geographical, 8 

 Distribution, geological, 8 : of Sponges, 

 113: Corals, 197: Brachiopoda, 342: 

 Cluetopoda, 447 : Insecta, 604 : Arach- 

 nida, 624 : Cephalopoda, 749 

 Distribution, vertical, 8 

 Dochmius duodenalis, 284 

 I >o< - oijl (>**, 6S3 

 Doctrine of Descent, 6 



