762 



INDEX 



Dermal cortex, 102*, 110 



Dermal pores, 347 



])t nnaptera, 587 



Desmoscolecichv, 296 



Desmoscohx, 297 



Desmospongiee, 103* 



Deutomerite of Gfreffttrina, 77 



Development, of &ycon, 113, 114: Sponges, 

 115: Obelia, 129, 130: SeptoUna*, 141: 

 Trachylimt, 144: Aurelia, 160, 161, 

 162 : Sea-anemone, 179 : Hormiphora, 

 204: Dici/tin'til,!-, 217, 218 : Khopalura, 

 219: Ptanaria,22o: Liver-Fluke, 229, 

 230: T<mia, 236: Platyhelminthes, 

 256: Nemertinea, 272, 273 ; Amiri*, 

 280 : Nematoda, 286, 287 : Chaeto- 

 gnatha, 295 : Brachionus rubens, 302 : 

 Rotifera, 309: Buyula, 317: Ecto- 

 procta, 325: Phoroni*, 329, 330: 

 Brachiopoda, 341 : Asterina, 358, 359 : 

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

 Antedon, 377, 398 : Echinodermata, 

 " ~" M ' IT ri', ,in (\\_<\_ 415 : Lum- 



453 : Gephyrea, 457 : Hirudo, 468, 

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

 Axtaciifi, 506 : Crustacea, 547 : Peri- 

 P'linx, 561 : Myriapoda, 569 : Peri- 

 plamta, 576: Insecta, 592 : Scorpion, 

 607,608: Arachnida, 618 : Anodontu, 

 636 : Pelecypoda, 655 : Amphineura, 

 665: Triton, 676, 677: Gastropoda, 

 692: 'Scaphopoda, 706: Sepia, 712, 

 713, 714, 715 : Nautilus, 730, 731 : 

 Cephalopoda, 743 



Dinwrpha, 66, 67 



Dimorphic zooids, of Ciliata, 89 



Dimorphism, sexual, 38" :; " 



Dinobryon, 66 



Dinoflagellata, definition, 65 : Charac- 

 teristic features, 73 



Dinophilea, 310 



Dinophilus, 482 



Dice'cious, 38 



Diophnjs, 83 



Diphyes, 152, 153 



Diplomita, 66 







DiastylM, 524, 543 



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



Diceras, 651 



Dichyocysta, 86 



Dicyema, 216, 217, 218 



Dicyemidw, 216, 217 



Didinium, 85 



DlDYMIUM DIFFORME, 61, 62 



Didymograptus, 155 



Differentiation, 21* 



Diffiwjia, 48 



Digenetica, 238*, 250, 253, 256 



Digestion, intracellular, 31 



Digestive glands, 31 



Digestive system, 30 



Digestive system, of Param<r<-ii(iii, 86 : 

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

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

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

 Platyhelminthes, 250, 251, 252: Ne- 

 mertinea, 269: Jsm/v's, 278, 279: 

 Nematoda, 283 : Cluutognatlui, 293 : 

 Brachionus rnlx-H*, 300, 301 : Rotifera, 

 3U7 : /SH</n/n, 315, 316 : Ectoprocta, 



323 : Endoproeta, 326 : Phormti*, 329 : 

 Maydlania, 334 : Axt.wia*, 353 : Sea- 

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

 Aufcd.on, 375: Echinodermata, 394: 

 .V'/v/. s 40(5, 407: L-intiln'it'nx, 420: 

 Chaetopoda, 436 : tfijinnrnluH, 452, 



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 



Distomum hepatic urn, 265 



D. rathousii, 265 



D. xinense, 265 



Distribution, 8: of Sponges, 113: Hydro- 

 corallinse, 147: Scyphozoa, 171 Ac- 

 tinozoa, 196 : Ctenophora, 211 : Platy- 

 helminthes, 263 : Ectoprocta, 326 : 

 Brachiopoda, 342 : Gephyrea,, 461 : 

 Hirudinea, 481 : Onychophora, 5(ili : 

 Pelecypoda, 661 : Amphineura, 670 : 

 Gastropoda, 704 : Cephalopoda, 749 



Distribution, geographical, 8 



Distribution, geological, 8 : of Sponges, 

 113: Corals, 197: Brachiopoda, 342: 

 Chsetopoda, 447 : Insecta, 604 : Arach- 

 nida, 624 : Cephalopoda, 749 



Distribution, vertical, 8 

 duodenal**, 284 

 , 683 



Doctrine of Descent, 6 



