1170 



INDEX 



PRI 



BAY 



Prism, Nicol's, 318; Nicol's analysing, 

 for resolving striae, 381 ; Abraham's, 

 401 



refracting angle of, 9, 18 

 Prismatic epithelium, 1044 



layer in molluscan shells, 919-925 



layer of shells compared with anamel, 

 920, 1025 



shell- substances imitated, 1102 

 Prisms, recomposition of light by, 18 

 Pristis, tooth of, 1024 

 Pritchard's doublets, 298 



microscope with Continental fine ad- 

 justment, 153 



Privet hawk-moth, eggs of, 1005 

 Problems on refractive index, 5 

 Procarp, of Floridece, 632 

 Projection eye-piece, 880 

 Promycele of Puccinia, 637 

 Prosenchymatous tissue, 696 

 Proteus, red blood-corpuscle of, 1036 

 Prothallium of Sphagnacece, 674; of 

 ferns, 677 ; of Equisetacece, 681 ; of 

 Rhizocarpece, 681; of Lycopodiacece, 

 681 



Protococcus, as gonid of lichens, 651 

 - pluvialis, 543-547 ; life-history of, 

 543 ; multiplication of, 544 ; zob'spores 

 of, 544 ; mobile and still forms of, 545- 

 547 ; encysted, 551 

 Protomyxa aurantiaca, 727-729 

 Protoneme of Batrachospermum, 575 

 Protophytes, 530, 651, 726 



mounting, 518 ; mode of nourishment 

 of, 532 ; movement by cilia and con- 

 tracting vacuoles of, 535 



Protoplasm, 530 ; vital attributes of, 531 ; 

 continuity of, 538, 630 ; of Rhizopoda, 



733 ; of Noctiluca, 767 

 Protoplasmic substance in Vertebrata, 



1017 

 PBOTOZOA, 726-785 



mode of nourishment of, 532 



' Pseudembryo ' of Antedon, 903 



Pseudo-navicellae, 751 



Pseudo-parenchyme of Fungi, 633 



Pseudopodia of Protomyxa, 728; of 

 Vampyrella, 730 ; of Lieberkuehnia, 

 731; of Rhizopoda, 733; of Reticu- 

 laria, 734 ; of Heliozoa, 734 ; of Lobosa, 



734 ; of Gromia, 735 ; of Micro gromia, 

 736 ; of Actinophrys, 738 ; of Amoeba, 

 743 ; of Arcella, &c., 746 ; in Amceba- 

 phase of monad, 757 ; of Eozoon, 841 ; 

 of Globigerina, 822; of Radiolavia, 

 847 ; of endoderm cells in zoophytes, 

 862 



Pseudoraphidecp, 599 



Pseudoscope, Wheatstone's, 92 



Pseudoscopic effects, 95 



effect with Ramsden's circles, 106 



vision, 92 



Pseudo-scorpions, 1008 



Pseudo-stigmata of Oribatidce, 1011, 



1012 

 Pseudo-tracheae, on fly's proboscis, 990 



note 



' Psorosperms,' 752 



Pteris, sori of, 675 ; indusium of, 675 



serrulata, apogamy in, 680 

 Pterocanium, 852 

 Pterodactylus, bones of, 1092 

 Pterophorus, wings of, 999 

 Pteroptus, 1012 



Ptilota, 630 



Puccinia graminis, 637 



Puff-ball, 647 



Pulvilliof insects, 1001 ; cockroach, 1000 



note 

 Pupa of Neuroptera, circulation in, 994 



stage of fly, 1007 

 ' Purple laver,' 632 



Purpura, method of examination of egg- 

 capsules of, 939 ; supplemental yolk of, 

 938, 1007 



lapillus, nidamentum of, 934 ; develop- 

 ment of yolk-segments of, 937 



' Puss-moth,' eggs of, 1005 

 Pycnogonida, 957 ; related to Arachnid a, 



959 note 



Pyrola, seeds of, 724 

 Pyroxene, aridesite, 1076 



q 



Quadrula symmetrica, 747 



Quartz-porphyries, 1072 



Quartzite, 1077 



Quekett (E.), on Martin's microscope, 



140 ; on production of raphides, 696 ; 



on preparation of tracheae of insects, 



997 ; on minute structure of bone, 



1092 



1 Quills ' of porcupine, 1030 

 Quinqueloculina, 802 



Radials of Antedon, 901 



Radiating crystallisation, 1097 



Radiation of light in different media, 58- 

 58 ; in air and balsam, 55-57 



Radiolaria, collecting, 529; fossilised 

 forms of, 846, 854 note ; central cap- 

 sule of, 847; skeleton of, 848-854; zoo- 

 xanthellae in, 848 ; bibliography of, 853 



colonies of, 848 ; distribution of, H53- 

 854 ; mounting, 854 



Radiolarian, shells in ' ooze,' 1086 



Rainey, on presumed cause of cattle 

 plague, 752 ; on molecular coalescence, 

 1100 



Ralfs, on British desmids, 579 note ; 

 classification, 585; on Nitzschia and 

 Bacillaria, 606 



Ramsden circles, 106 



Ramsden's ' screw micrometer eye-piece,' 

 272; positive eye-piece, 42, 378, 380 



Raphidece, 599 



Raphides of Phanerogams, 696 ; of plants 

 and sponge-spicules compared, 860 



Rays, scales of, 1028 



