608 



Diffuse liver (Gastr.), 192 

 Digonopora, 8 

 Dimerocrinus, 367 

 Dimyaria, 14, 124 ; shell, 63 

 Diotocardia, 4) 30 

 Dipleurula larva, 546 

 Diplopodia, 290 

 Discodoris, 13 

 Discoidea, 291 

 Distichals (Grin.), 371 

 Docoglossa, 5 

 Dolabella, 10 

 Doliidce, 6 

 Dolium, 102 

 Donacidce, 18 

 Donax, 18 

 Dondersia, 3 



,, batyulensis, 251 



,, flavens, 184 

 Dondersiidce, 3 

 Dorididce cryptobranchiata, 13 



,, phanerobranchiata, 13 

 Doridiidce, 10 

 Doridium, 46 

 Doridopsidce, 13 

 Doriopsis, 214 

 Doris, respiratory and circulatory organs, 



98 



Dorocidaris papillata, 388 

 Dorsal axis (Blast.), 331 ; cartilage (Ceph.), 



127 



Dorycrinus, 307 

 Dosidicus, 69 

 Dotonidce, 13 



Dreissensia polymorpha, gills, 94 

 Dreissensiidce, 17 

 Disaster, 293 

 Dytaster, 296 



ECHINASTER, 299 



,, sepositus, 483 



Echinasteridce, 299 

 Echinidce, 290 

 Echinobrissus, 293 

 Echinocardium, 293 



flavescens, 398 



Echinocidaris, 290 



nigra, ambulacrum, 393 



pustidosa, 291 



Echinoconus, 293 

 Echinocorys, 293 

 Echinocrepis, 295 

 Echinocrinus (Archceocidaris), 289 

 Echinocyamus, 291 



,, pusillus, gastrula, 520 ; 



Pluteus larva aud young, 

 520-524 ; tentacle, sec- 

 tion, 464 



Echinocystis (Cystocidaris), 289 

 Echinodermata, alimentary canal, 475 ; 

 representatives of principal divisions, 

 316 

 EcJiinodiscus, 293 



Echinodiscus biforis, 424 

 Echinoencrinus, 313 



, 333 



Echinoidea, 288-295; endocyclic, 322; 

 exocyclic, 322 ; larva, 509 ; organisa- 

 tion of regular, 419 ; pedicellarise, 

 397 ; Pluteus, 520-524 ; radial region, 

 section, 410 

 fa/nnolampas, 293 

 Ki-Jiinometra, 290 

 Efliinometridce, 290 

 Echinoneidce, 293 



93 



is, 290 

 Echinospatagus, 293 

 /jrhiiiux/ihcera, 386 

 Echitwthrix, 290 

 KfliiiKiflmriii, 290 

 /;</! inn/// it n't/ii , 290 

 Kelt limn, 29(J ; apical system, 318 ; masti- 



catory apparatus, 401 

 ,, acntifs, 398 

 ,, melo, 398 

 , 387 

 , 315 

 a, 285 

 Eledone, 24 



,, nmschata, secondary body cavity, 



diagram, 214 

 El< I'fherocrinus, 315 



,, Cassedayi, apical side, 



331 ; oral side, 383 

 Kljiidia, 285 



,, glacialis, 467 

 Elpidiidoe, 285 

 , / .' 



, 4', shell, 59, 156 

 Embryonic cone, 257 

 K/Liillocrinus, 308 

 Encope, 293 



,, V<ilenciennesi, system of plates, 



346 

 Enrrinus, 304 \ ax i ft l canals, 378 



,, liliiformis, 304 

 Endoceratidce, 67 



Eudogastric coil (Gastr.), 67, 68, 159 

 Enoploteuthis, 127 ; musculature, 127 

 Ensis, 19 



Enter opneusta, 561-596 ; branchial region, 

 567, 580 ; larvae, 586-590, 594 ; pro- 

 boscis, section, 583 

 Entocolax Ludwigii, 246, 247 

 Entoconcha, 183 



,, mirabilis, 247, 248 



Entovalva, 229 

 Eolampas, 293 

 Eolis Drummondi, 183 

 Epineural canal, 449 

 Epipodial lobes (Ceph.), 38 

 Epipodium, 106 

 Episternum, 349 

 Epistroma, 349 

 Eretmocrinus, 307 



