1148 



INDEX 



CYS 



Cyst, of Protococcus, 544, 551 ; of Proto- 

 myxa, 728 ; of Clathrulina, 742 ; of 

 gregarines, 751 ; of Dallingeria, 759 ; 

 of Polytoma, 760 



Cystic Entozoa, relation to cestoids, 944 

 Cysticercus, relation to cestoids, 944 

 Cystids of Hymcnomycetes, 648 

 Cystocarp of Floridece, 632 ; of Batra- 



chospermum, 574 

 Cystopus Candidas, 640 

 Cythere, 960, 961 



Cytherina, shells of, in chalk, 1087 

 Cytodes, contrasted with plastid, 727 

 Cytoplasm, 537 



Dallinger and Drysdale's moist stage, 

 341 ; tripod, 402 ; on life-history of 

 monads, 756-768 ; on effects of tempe- 

 rature on monads, 761 



Dallinger (W. H.), on Navicula, &c., as 

 test objects, 600 note ; on nucleus of 



monads, 762 



Dallinger's thermo-static stage, 344-346 

 Dallingeria Drysdali, life-history and 



structure of, 758 ; nucleus of, 762 

 Dalyell (J. G.), on Hydra tuba, 874 

 Damceus geniculatus, proventriculus of, 



1011 

 Dammar, as a preservative medium, 518 ; 



as a mounting medium, 521 

 Dandelion, laticiferous tissue of, 695 ; 



- pollen-grains of, 721 



Daphnia, eye of, 960 ; eggs of, 964 ; 



ephippial eggs of, 964 

 Daphnia pulex,$% 

 Darwin (Charleston Cirripedia,QQ7 

 Datura, seeds of, 724 

 Davis, on desiccation of Motif era, 791 



note 

 Dawson (W.), on foraminiferal nature of 



Eozoon, 837 

 ' Day-fly.' See Ephemera. 



* Dead-man's toes,' 879. SeeAlcyonium 

 Dean's medium for mounting insects, 



973 

 De Bary, on fungi, &c., 634 note ; on 



potato-disease, 640 ; on alternation of 



generations in ferns, 680 

 Decalcification, 512 ; of echinoderms, 



512 ; of bones, 512 ; of teeth, 512 ; of 



Foraminifera, 513 ; of Eozoon, 513 

 Decapoda, 957 ; exoskeleton of, 968 ; 



macrurous, 969 ; brachyurous, 969 

 Decomposition, produced by Bacteria, 



661 



of rock-masses, 1076 

 Defining power, 425 ; tests for, 426 

 Definition of image, 882 

 Degeneration in Tunicata, 911 

 Dehydration, 487 

 Dellebarre's microscope, 144 

 Delphinium, seeds of, 724 

 Demodex, legs of, 1010 



folliculorum, 1014 



DIA 



De Monconys, his compound microscope, 



128 

 Dendritina, a varietal form of PeneropHs, 



803 



Dendrodus, teeth of, 1091 

 Dendrosoma, 784 

 Dentine, 1019, 1023-1026 



resemblance of cuticle of crabs to, 

 969 ; in placoid scales, 1028 



Deparia, indusium of, 675 



prolifera, 676 



Depth of focus, 83, 89 ; of vision, 88, 89, 



90 ; perception of, 94, 95 

 Dermal skeleton of Vertebrata, 1026 

 Dermaleichi, 1008, 1014 

 Dermanyssus, 1012 



larva of, 1009 

 Dermestes, hair of larva, 980 

 Descartes' simple microscope with reflec- 

 tion, 126 



Desiccation of rotifers, 791 



Desiderata in a microscope, 261-263 



Desilicification, 513 



DESMTDIACE^E, 549, 579-587 ; connection 

 with Pediastrece, 566 ; sutural line X)f, 

 580 ; cellulose envelope, 580 ; mucila- 

 ginous sheath, 580 ; primordial utricle, 

 580 ; endochrorre, 580 ; movements of, 

 580 ; cyclosis in, 581 ; binary division of, 

 582 ; sexual reproduction, 584 ; classi- 

 fication of, 585 ; habitat of, 586 ; mode 

 of collecting, 586 



Hantzsch's glycerin method of pre- 

 serving, 520 



Desmidiece, 945 



conjugation of, 584 ; zygospore of, 584 

 Desmidium, binary division, 582 ; fila- 

 ments of, 583 



Desmids. See Desmidiacece 



Deutovium of Acarina, 1008 



Deutzia scabra, stellate hairs of, 714 ; 

 epiderm of, 715 



Development of Hydra, 866, 867 ; of hy- 

 droids, 868 ; of embryo in Gastropoda, 

 919; of molluscs, 933; of Annelida, 

 949 ; of Tomopteris, 953 ; of insects, 

 1007 



Deviation, 9 



' Diamond Beetle,' 975 



Dianthus, seed of, 723 



caryophyllceus, parenchyme of, 688 

 Diaphragm, 261, 297, 306, 308, 310, 812, 



313, 314 



with two openings for double illumina- 

 tion, 104 



.Zeiss's iris, 297; calotte, 297 ; in eye- 

 pieces, 376-379, 381 ; for use in test- 

 ing object-glasses, 385, 386 



in Tully's microscope, 149 

 Diatoma, 588 ; frustules of, 588, 605 



viilgare, chains of, 605 

 DIATOMACE.E, 549, 587-625 



perforated membrane of, examined 

 with annular illumination, 419; mode 

 of examination of, 419 ; mounting, 481 

 silicious coat, refractive index of, 521 

 stipes of, 588 ; beaded appearance, 592 



