n68 



INDEX 



PHI 



PJiilnnthits, antennae of, 988 

 Phloem, 710 

 - of Exogens, 697 

 Pliolas, shell of, 924 

 Phoronis, 950 

 Phosphorescence of sea, due to Noctiliira, 



765 



Phosphorus, as a mounting medium, 521 

 Photographic microscope, Zeiss's, 257, 



258 

 Photometrical equivalent of different 



apertures, 50 

 Photo-micrograph through eye of Lam- 



pyris, 984 

 Photo-micrography for micrometry, 277 ; 



projection eye-pieces for, 380 

 Campbell's differential screw used in. 



165 



PJn-yganea, eye of, 983 

 Phycocyanin in Ghrodcoecaceee, 547 

 Phyco-erythriii, 631 

 Phycomyces nitens, 641 

 Phycophsein, 626 

 PJiylactolcemata, 909 

 Phyllite, 1077 note 

 PJ/yllupoda, 962 

 P]iyU<>niiu/i/ta, skeleton of, 968 

 Ph ysartnn album, development of, 635 

 Physciu parietina, 650 

 Plujama cltrilaf/niitiiit, 650 

 Phytrlr/tJids, endosperm of seed of, 693 

 Phytophthora iiifestans, 639, 640 

 Phytopti, mouth-parts of, 1010 

 PhytoptidcB, 1008; characters of, 1014 

 PJiytoptiis, larva of, 1009 

 Picric acid, 485 

 Picro-carmine, 489 

 Piedmontite, 1095 

 Pieridee, scales of, 975 

 Pigment-cells of cuttles, 942 ; of ver- 

 tebrate skin, 1042 ; of fishes, 1043 ; of 



Crustacea, 1043 



Pigmentum nigrum, of eye, 1043 

 Pike, scales of, 1028 

 Pileorhiza, 710 

 Pileus of Acetabularia, 563 

 Pilidiiun gyrans, 950 

 Pilulina Jeffreysii, 812 

 Pimpernel, petals of, 719 

 Pines, pollen-grains, showers of, 722 note 

 I 'in/id, structure of shell of, 919-922; 

 prisms of shell of, in Globigerina ooze, 

 1086 ; prisms of, in chalk, lo.sT 



ii/i/rina, colour of shell of, 921 

 I'/ininltirid, C>17 

 dactylux, i'i-jl 

 - nobilis, 021 

 Finns canadensis, 41:; 

 Pipette, 351, 470 

 I 'Iscilitlu'i- irr.iins, 1084 

 Pistil, 722 



Pitcher-plant, spirit 1 fibre cells of, 698 

 Pith. im-aM^cim-nt of, 700, 702 

 J'ittcil duct-, ii[ I'liaiiiTiiuiuii-,, f.'.l'.l 



Pli id scales, 1(12* 



ase felspar, KINO 

 Planaria, stomach of, '. it; 



POL 



Planarice, 946; movement of, 946; fis- 

 sion of, 947 ; ocelli of, 947 ; intracellular 

 digestion in, 863 



Planarians. See Planarice 



allied to Ctenophora, 883 

 Plano-concave lens, 13 

 Plano-convex lenses, 13, 15, 22, 37 

 Planorbulina, 824 



Pldiitdgo, 'Plantain,' cyclosis in, 691 

 Plants and animals, differences between, 



531 



Planulffi, 868 



Plcninlaria hexas, in chalk, 1087 

 Plasmode in cells of Nitella, 579 note ; 



of JEtlialium, 634; of Myxomycetes, 



635 

 Plasmodium of Protomyxa aurantiaca, 



729 



Plastid, contrasted with cytode, 727 

 Plastidules, flagellated, of Protomyxa, 



729 

 Plates, calcareous, of Holotlnirioiilcn , 



895 



Pleochroism, 1078, 1098 

 Pleochroism, variations of, 1080 

 Pleurosigma, 588, 617 



diffraction image of, 71 



angulatiun, 69-71; as test for defi- 

 nition, 426; markings on, 592, 593 



formosum, as test for definition, 426 



Spencerii, sporules of, 597 



Pliny, on cauterisation by focussing sun's 



rays, 117 ; on sight, 118 

 Ploima, 791, 792 

 PhinidteUa, collecting, 528 

 ' Plumed-moth,' wings of, 999 

 Plumule of Pieridee, 975 

 Plutarch, on myopy, 118 

 Pluteus larva of echinoids, 897-899 

 Podocyrtis cothurnata, 847 



- mitra, 847, 852 



- ScJiomburgkii, 849, 852 

 Podophrya quadripartite/,, 784; imma- 

 ture form, 785 



elongata, 785 

 I'liilosphenia, sporules of, 597 

 Podura scale as test for high powers, 



389 



' Podura scales,' 976, 979 



Poduridte, 979 



Pointer in eye-piece, 381 



Poisons, micro-chemistry of, 1103 



Polarisation tints, 1080 



Polariscope, condensers for use with, 

 314 ; for examination of gastropod 

 palates, 933 ; crystals for use with, 

 Ki;i7; list of objects for, 1099 



Polarised light, rings and brushes of mine- 

 rals under, 319,320; for insect work, 

 423 ; use of, in micro-petrology, 1068 



Polariser, 318, 319 ; achromatic conver- 

 gent for, 1070 note 



Polarising apparatus, 317-319 ; condenser 

 for, 314 ; Swift's illuminating and, 319 



Polarising prism, substitution of opales- 

 cent mirror for, 194 



1 Polierschirlc]-,' (117 



