55° 
Dictynidae, 352, 353, 398 
Digestive system, =alimentary canal, qv. 
Dikelocephalus, 247 
Dimorphism, high and low ; in Decapoda, 
103 ; in Tanaids, 123 
Dindymene, 251 
Dinopinae, 410 
Dinopis, 410 
Dinorhax, 429 
Diogenes, 151 
Dionide, 245 
Diphascon, 485; D. alpinum, 487; D. 
angustatum, 487; D. bullatum, 487 ; 
D. chilenense, 486, 487; D. oculatum, 
487 ; D. scoticam, 487 ; D. spitzbergense, 
487 
Diplocentrinae, 306, 307 
Diplocentrus, 307 
Diplocephalus bicephalus, 405 
Diplostichous eyes, 301 
Diplura, 390 
Diplurinae, 390 
Dipoena, 403 
Discoarachne, 512, 535 
Distribution, of Crustacea, 197 f. ; (strati- 
graphical) of Trilobites, 222 
Doflein, on eyes of deep-sea Crustacea, 
148, 150 
Dohrn, 504, 513, 519 
Doleschall, 365 
Dolichopterus, 283, 291 
Doliomelus, 415 
Dolomedes fimbriatus, 416 
Dolops, 78 
Domed webs, 350 
Donachochara, 406 
Donnadieu, 457 
Dorippe, 185, 188 
Dorippidae, 78S 
Doropygus, 66; D. pulex, 66 
Dorsal organ, of Phyllopoda, 22; of 
Cladocera, 39 
Doublure, 232 
Doyere, on Tardigrada, 481 ; 
systematic position, 483 
Doyeria, 485 ; D. simplex, 480, 487 
Drassidae, 324, 396 
Drassinae, 396 
Drassus, 3897 ; D. lapidosus, 396, 397 
Drepanothrix, 53 
Dromia, 184; D. vulgaris, 184 
Dromiacea, 1/83; metamorphosis, 182 ; 
relation to Macrura, 184 ; habitat, 198 
Dromidia, distribution, 200 
Dromiidae, 184 
Drymusa, 393 
Dufour, 385 
Dujardin, 464 n.; on systematic position 
of Tardigrada, 483 
Duplorbis, 95; D. calathurae, 99 
Dynomene, 184 
Dynomenidae, 784 
on their 
INDEX 
Dysdera, 3594; D. cambridgii, 394; D. 
crocota, 3895 
Dysderidae, 317, 319, 336, 394 
Dysderina, 394 
Dysderinae, 394 
HKbalia, 188 
Echiniscoides, 485 ; E. sigismundi, 477, 
486 
Echiniscus, 480, 485; #. arctomys, 486 ; 
E. gladiator, 486; #. granulatus, 486 ; 
E. islandicus, 486 ; L. muscicola, 486 ; 
E. mutabilis, 486; EH. oihonnae, 486 ; 
E. quadrispinosus, 486 ; EH. reticulatus, 
486; H. spinulosus, 479 ; HE. spitzberq- 
ensis, 486 ; H. testudo, 478; EH. wendti, 
486 
Echinoderms, Dendrogaster parasitic on, 
94 
Echinognathus, 283 
Eeribellatae, 385 
Ectatosticta davidi, 393 
Ectinosoma, 62 
Edriophthalmata, 112, 121 
Eggs, of Phyllopoda, 32; of Cladocera, 
44; of Copepoda, 59, 62, 66, 67, 71, 
74; of Branchiura, 77; of Synearida, 
114; of Peracarida, 123; of Hoplo- 
carida, 1413; of Eucarida, 144; of 
Trilobites, 238; of Limulus, 2753; of 
Pedipalpi, 309; of Spiders, 358; of 
Solifugae, 424; of Pseudoscorpions, 
434 ; of Phalangidea, 442; of Acarina, 
456; of Tardigrada, 478; of Penta- 
stomida, 493 ; of Pyenogons, 520 
Ehrenberg, on systematic position of 
Tardigrada, 485 
EHleleis crinita, 396 
Ellipsocephalus, 224, 235, 247; H. hoff, 
248 
Embolobranchiata, 248, 259, 297 f. 
Emmerich, on facial suture of Zrinucleus. 
226 
Encephaloides, 193; E. armstrongi, 192, 
193 ; habitat, 205 
Encrinuridae, 257 
Enerinurus, 227, 235, 251 
Endeis didactyla, 534; E. gracilis, 539 ; 
E. spinosus, 541 
Endite, 9, 10 
Endopodite, 9, 10 ; of Trilobites, 237 
Endosternite, 257, 305, 330 
Endostoma, of Hurypterus, 287 
Engaeus, 157 ; E. fossor, distribution, 213 
Enoplectenus, 418 
Enterocola, 67; E. fulgens, 67 
Entomostraca, defined, 6; diagnosis, 18 ; 
of littoral zone, 197; fresh-water, of 
southern hemisphere, 216 
Entoniscidae, 130, 734 
Enyo, 400 
Enyoidae, 399 
