113! 



INDEX 



ACT 



Actinosphcerium Eicliornii, 741 



Actinotrocha, 950 



ACTINOZOA, 863, 877-883 



Actius, on myopy, 118 



Actuarius, on myopy, 118 



Adams' variable microscope, 142; non- 

 achromatic microscope, 148 



* Adder's tongue ' fern, (379 ; sporanges of, 

 675 



Adipose substance, 1045 



Adjusting objectives, Ross's, 357, 360 



Adjustment, coarse, 159-162; Swift's 

 diagonal rack, 161 ; Nelson's stepped 

 rack, 161 ; Wale's, 224-226 



fine, 162-175 



- Ross's, 153, 155, 175 ; to Pritchard's 

 microscope, 153 ; Watson's long 

 lever, 162, 172, 175 ; ' Continental ' 

 type, 162 ; Swift's vertical side 

 lever, 16?, 173, 174; Campbell's 

 differential screw, 164, 165, 175, 

 236; Zeiss's, 166, 175; Reichert's 

 new lever, 171, 175 ; Powell's, 174 ; 

 short side lever, 174 ; speeds of, 

 175 ; to the sub-stage, Nelson's, 

 185 ; for Powell and Lealand's sub- 

 stage, 186 



screw collar, 360 



^cidiospore generation of Puccinia, 

 637 



JEcidium berberidis, relation to Puc- 

 cinia, 637 



tussilaginis, 638 



JEthaUum septicum, plasmode of, 634 

 AgaricuS) 647 



campestris, 648 

 Agate, 1095 



Agave, leaf of, 686 ; raphides of, 696 

 Agrion, 987 



pulchellum, wing of, as test for defi- 

 nition, 426 



puella, pupa of, 994 ; wing of, 994 

 Air-angle, 50, 78 



Air-bubbles, microscopic appearance of, 



429, 430 



Air-chamber of leaves, 716 

 Alse of Surirella, 606 

 ' Alar prolongations ' in Fusulina, 826 ; 

 in NummitUtes, 827, 831; of Calca- 

 rina, 830 

 Albite, 1080 

 Albuminous substances, tests for, 516, 



517 



Alburnum, 704, 708 

 Alcohol, as solvent for resins, &c., 517; 



as hardening agent, 484 

 Alcyonaria, 877, 879; spines of, imi- 

 tated, 1101 



Alcyonian, resembled by polyzoan, 908 

 Alcyonidium, 908 ; polyzoary of, 909 

 gelatinosum, calcareous spicules in, 



908 note 

 Alcyonium digitatum, 879; spicules of, 



880 

 Alder, on branchial sac of Corella, 912 



note 

 Alexander, on myopy and presbyopy, 118 



ANA 



, preparation of, 514; included 

 under general term of ' thallophytes,' 

 540 ; symbiotic in radiolarians, 848 

 lime secreting, 1084 

 Algal constituents of lichens, 650 

 Alkaloids, micro-chemical examination of, 



1103 

 Allman's experiments on luminosity of 



Noctiluca, 7t>9 



Allman, on Polyzoa, 909 ; on the ' Haus ' 

 of Appendicularia, 918 ; on Myrio- 

 thela, 863 note 

 Aloe, raphides of, 696 

 Alternation of generations in Batracho- 

 spermum, 575 ; in Fungi, 634 ; in ferns, 

 680; in Medusce, 877 

 Althcea rosea, pollen-grains, 721 

 Alveolina, 804 ; resembled by Loft until, 



818; resembled by Fusulina, 825 

 Amaranthacece, pollen-grains, 721 

 Amaranthus hypochondriacus, seeds of, 



724 ' - 



Amaroucium proliferum, as example of 



compound ascidian, 912 

 Amici suggests oil for immersion lenses, 



29 



Amici's invention of immersion system, 

 27 ; horizontal microscope, 148 ; camera 

 lucida, 279; objectives, 355; triple- 

 back objectives, 361 ; water-immersion 

 objectives, 362; oil-immersion objec- 

 tives, 364 

 Ammodiscus, 814 

 Ammothea pycnogonoides, 958 

 Amoeba, 733, 742-747, 1018 

 Amceba-ph&se of Monas, 756 

 A mceba proteus, 742 

 radiosa, experiments on, 743 

 Amcebcp, cells of sponges resembling, 



855 



Amoeboid phase of Tetramitus, 761 

 Amphibians, plates in skin of, 1026 

 Amphioxus, affinities with ascidians, 917 



note 



Amphiplenra pelliicida, with oblique 



illumination, 59, 75 ; resolution of, 85 ; 



markings measured, 274; markings 



on, 592 



Amphistegina, 827 ; internal cast of, 



841 



Amphitetras, 614 



Amphiuma , red blood-corpuscle of, 1036 

 Amphonyx, haustellium of, 992 

 Amplification, 88-90 



linear, 26, 39 ; of images, 45 

 Ampullaceous sacs of sponges, 856, 857 

 Anabcena, 548 



Anacharis, 528 



alsinastrum, cyclosis in, 689 ; habitat, 

 690 



Anagallis, raphides of, 696; seeds of, 

 724 



arvensis, petals of, 719 

 Anal plate of Antedon, 903 

 Analgesinfp, 1013, 1014 

 Analyser, 318 

 Analysing nose-piece, 294 



