INDEX 



637 



Cvstoidea, 580, 597 f. 



Cytogamy, 33 f. 



Cytoplasm, 6 ; of ovum of Sea-urchin, 7 ; 



granular, nutritive, of muscle cell, 19 ; 



in cell-division by mitosis, 26 f. ; during 



syngamy, 34 



Dactylometra, 311, 323; D. lactea, 312 



Dactylopores, 257 



Dactylozooids, 264 ; of Hydractinia, 264 ; 

 of Millepora, 259 ; of Siphonophora, 299 



Dale, on chemiotaxy, 22 



Dallinger, W. H., and Drysdale, C, on 

 Protozoa, 44, 45 ; on organisms of putre- 

 faction, 44, 116 f. ; on life-histories of 

 Flagellates, 116 f. 



Dallingeria, 111, 112, 119; anchoring 

 hagella of, 114 ; D. drysdali, gametes 

 of, 116 n. 



Daly ell, 317 n., 375 



Dangeard, on brood - division in active 

 Chlamydomonaclidae, 115 ; on Flagel- 

 lata, 119 n. 



Dantec, Le, on protoplasmic movements, 

 16 n. ; on peptic digestion in Protozoa, 16 



Darwin, 328 n., 360, 391 



Darwinella, 221 



Dasygorgiidae, 333 ( = Chrysogorgiidae, 

 355) 



Davenport on protoplasmic movements, 

 16 n., 19 n. 



Dawydoff, 423 



Dead men's fingers ( = Alcyonium digita- 

 tum, 349) 



Death, 11 ; by diffluence, granular disin- 

 tegration or solution, 14 f. ; by desolu- 

 tion, 15 ; necessary, of colonial cells of 

 Volvox, 128 ; in Volvox and in Metazoa, 

 compared, 130 



Deep-sea deposits (Foraminifera), 70 



Degen, on functions of contractile vacuole, 

 15 n. 



Degeneration, senile, among Ciliata, 148 



Deglutition in Podophrya trold, 159 see 

 also Ingestion of food 



Deiopea, 419 



Deiopeidae, 4W 



Delage, on protoplasm, 3 n. ; on syngamy, 

 34 n. ; on motion of flagella, 114 n. ; 

 on Sponges, 168, 174, 226 ; and 

 Herouard, on Protozoa, 46 



Delap, M. J., 311 n. 



Deltoid plate of Blastoidea, 599 



Demospongiae, 195, 209 f. 



Dendoryx, 224 



Dendrite, 444 



Dendrobrachia, 409 



Dendrobrachiidae, 409 



Dendroceratina, 209, 220, 221 



Dendrochirota, 568, 569, 572, 577, 578 



Dendrocometes, 159, 160, 161 f. 



Dendrograptidae, 281 



Dendrograptus, 281 



Dendrophyllia, 404 



Dendy, 188 n., 192, 274, 275 



Depastrella, 321 



Depastridae, 320, 321 



Depastrum cyathiforme, 321 



Depressor muscles of compasses of Echinus 



esculentus, 527 

 Dercitus bucklandi, 221 

 Dermal, gill see Papula ; membrane, 170 

 Dermalia, 201 

 Dermasterias, 471 

 Desma (the megasclere which forms the 



characteristic skeletal network of the 



Lithistida, an irregular branched spicule), 



215, 224 

 Desmacella, 224 

 Desmacidon, 222 

 Desmophyes, 307 

 Desmophyinae, 307 

 Desmothoraca, 71 

 Desolution of protoplasm, 11 f. 

 Deutomerite, 98 

 Development, of Sponges, 226 ; of 



Scyphozoa, 316 ; of Alcyonaria, 341 ; 



of Zoantharia, 373 ; of Echinodermata, 



601 f. 

 Dextrin, 15 



Diadematidae, 531, 532, 538 f., 558 

 Diadematoid type of ambulacral plate, 



531, 539 

 Dialytinae, 192 

 Diancistra (a spicule resembling a stout 



sigma, but the inner margin of both 



hook and shaft thins out to a knife edge 



and is notched), 222 

 Diaphorodon, 59 ; shell of, 60 

 Diaseris, 404 ', asexual reproduction, 388 

 Diatomaceae, skeleton of, 84 ; symbiotic 



with Collosphaera, 86 

 Diatomin, 86 ; (?) in coloured Flagellates, 



115 n. 

 Dichoporita, 598, 599 

 Dicoryne, 268, 270 

 Dictyoceratina, 220 

 Dictyocha, 110 

 Dictyochida ( = Silicoflagellata, 110), 79; 



in Phaeocystina, 86 f. 

 Dictyocystis, 137 ; test of, 152 

 Dictyonalia, 201 

 Dictyonema, 281 

 Dictyonina, 202 

 Dictyostelium, 90 

 Dicyclica, 594 

 Dicymba, 308 

 Dicystidae, 97 



Didinium, 137 ; trichocysts of, 143 

 Didymivm, 90 ; D. difforme, 92 

 Didymograptus, 282 

 Diffluence, 1 4 f. 

 Dijfiugia, 52 ; D. jynformis, 55 ; test of, 



55 



V 



