INDEX 



619 



Dipleurula, 55S; 55i, 552 



Diploblastica, 120. See also Coelen- 

 terata 



Diplograptus, 148; 150 



D.foliaceus, 149 



Diplomonadina, 60, 61, 62 



Diplopoda, 379 



Diplopores, 582 



Diploporida, 582 



Diplozoon, 193; 194 



Diptera, 436; 386, 439 



Dipylidium caninum, 201, 204 



Direct wing muscles, 386 



Directives, 163, 164 



Discomedusae, 152 



Dissosteira Carolina, 392 



Distephanus, 46 



D. speculum, 45 



Distomiim macrostomiim, 194 



Division of protozoan nuclei, 19 



Docoglossa, 489 



Dolichoglossus kowalevskii, 586 



Doliolida, 607; 600, 603, 604 



Doliolum, 608 ; 599, 600, 606 



Donax, 503 



Doris, 494 ; 480, 493 



Dorsal and ventral, 124; aspects of 

 bilateral animals, 124; aspects of 

 Ciliata, 97; aspects of Holothu- 

 roidea, 572, 573 ; aspects of Sepia, 

 515; "blood vessels" of Echi- 

 noidea and Holothuroidea, 553, 

 567, 575 ; mesenteries of Alcyo- 

 naria, 159; structures in radial 

 animals, 124 



Dorsal antenna, 212 



Dorsal blood vessel, of Arthropoda, 

 see Aorta; of Chaetopoda, 230, 

 240 



Dorsal "blood vessels" of Echino- 

 dermata, 553, 567, 575 



Dorsal cirrus, 23 1 



Dorsal lamina, 600 



Dorsal organ, 297 



Dorsal plates, 562 



Dorsal pores, 254 



Dorsal shield, 297 and n. 



Dorsal siphon, 501 



Dorsal tubercle, 592 



Dorsolateral antennae, 212 



Drag line, 461 



Dreissensia, 473, 507 



Drift net, of Physalia, 145 ; 147 



Ductus communis, 185, 186, 199 



Dytisciis, 393; 385 

 D. niarginalis, 396 



Earthworms, 253 



Ecardines, 542 



Ecdysis, see Moult 



Echinaster sentiis, 560 



Echinocardiwn, 571 



E. cordatum, ^Ti 



Echinocyamus, 571 



E. pusilhis, 571 



Echinodermata, 547; 2, 122, 124 



Echinoidea, 564; 547 



Echinopluteus, 556 



Echinosphaera, 582 



Echinus, 567, 567, 570, 570, 571 



E. esculentus, 564 



E. miliaris, 565 



Echiuroidea, 268 



Echiurus, 268 ; 268 



Ectoderm, 120, i ; 121, 125, 129, 248 



Ectoneural system, 554; of Crinoidea, 

 580 



Ectoplasm, 8; 15, 39, 62, 63, 65, 71, 

 90, 95, 97, 98 



Ectoprocta, 536 



Edrioaster, 582 



E. bigsbyi, 581 



Edrioasteroidea, see Thecoidea 



Edwardsia, 164; 165 



Efferent canals, see Exhalant canals 



Egg sac, 334 , 



Eggs and Egg laying, of Arachnida*, 

 452, 457, 461 ; of Arthropoda, 280; 

 of Balanoglossus, 590 ; of Buccinum, 

 492; of Chaetognatha, 544; of 

 Ciona, 597 ; of Cnidaria*, 131, 135, 

 138, 139, 140, 152, 155, 160; of 

 Crustacea*, 3 14, 3 18, 321,324, 329, 

 334, 338, 340, 345, 368 ; of Cteno- 

 phora, 173 ; of Dinophilus, 263 ; of 

 Echinodermata, 554; of Hiru- 

 dinea, 266; of Insecta*, 411, 415, 

 417, 419, 420, 423, 424, 425, 426, 

 427, 429, 442; of lulus, 381; of 

 Myriapoda*, 379, 381; of Nema- 

 toda, 218, 220, 222, 223, 225, 227; 

 of Oligochaeta, 256 ; of Pantopoda, 

 467 ; of Peripatus, 285 ; of Platy- 

 helminthes*, 185, 186, 187, 193, 

 194, 196, 199, 201 ; of Polychaeta, 

 243 ; of Pulmonata, 481, 488, 496; 

 of Rotifera, 213 ; of Sepia, 522; of 

 Thaliacea, 604 



