I I JO 



INDEX 



PKI 



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

 for resolving striae, 381; Abraham's, 

 401 



- refracting angle of, 9, 18 

 Prismatic epithelium, 1044 



- layer in molluscaii shells, 919-925 



- layer of shells compared with snamel, 

 920, 1025 



shell-substances imitated, 1102 

 Prisms, recomposition of light by, 18 

 Frist is, 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, 380 

 Promycele of Puccinia, 637 

 Prosenchymatous tissue, 696 

 Proteus, red blood-corpuscle of, 1036 

 Prothallium of SphcCgnacecB, 674; of 

 ferns, 677 ; of Equisetacece, 681 ; of 

 Rhizocarpece, 681; of LycopocLiaceee, 

 681 

 Protococciis, as goiiid of lichens, 051 



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

 543 ; multiplication of, 544 ; zouspores 

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

 547 ; encysted, 551 



Protuuiijxu aiiraiifincii, 727-729 

 Protonenie 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 Rhizopaila, 



733 ; of Noctiluca, 707 

 Protoplasmic substance in Vertebrata, 



1017 



PROTOZOA, 726-785 

 - mode of nourishment of, 532 



' Pseudembryo' of Antedon, 903 



Pseudo-iiavicelhe, 751 



Pseudo-parenchyme of Vnmji, 633 



Pseudopodia of Protoi/ii/xa, 728; of 

 Vampyrella, 730; of LieberkiteJvnia, 

 731; of Rhizopofla, 733; of Rcti,-/<- 

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



734 ; of Gromia,T35 ; of Mi/-rnt/ninti(i, 

 736; of Act inoplirys, 738; of Aiitwbn, 

 743; of Arcella, &c., 746 ; in Amoeba 

 phase of monad, 757 ; of Eozoiin, 841 ; 

 of Globigerina, 822; of Radiolatia, 

 847 ; of endoderm cells in zoophytes, 

 862 



Pseiiilorti/iliiiti'ii', 599 



1 'seudoscope, Wheatstone's, 92 



Pseudoscopic effects, 95 



effect with Ramsden's circles, 106 



- vision, 92 

 Pseudo-scorpions, 1008 



I' < Mild stiumata of Orilmfiilce, 1011, 



1012 

 Pseudo-tracheee, on tly's proboscis, 990 



note 



RA.Y 



' Psorosperms,' 752 



Pteris, sori of, 675 ; iiidusium of, 675 



serrulata, apogamy in, 680 

 Pterocaniwm, 852 

 Pterodactylus, bones of, 1092 

 Pterophorus, wings of, 999 

 Pteroptus, 1012 



Ft Hot a, 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 



Ptirpura, method of examination of egg- 

 capsules of, 939 ; supplemental yolk of, 

 938, 1007 



lap III us, nidamentum of, 934 ; develop- 

 ment of yolk-segments of, 937 



' Puss-moth, 1 eggs of, 1005 

 Pyc>iogoni(la,yoT; related to A rarlinida, 



959 note 



Pijrohi, seeds of, 724 

 Pyroxene, andesite, 1076 



Q 



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 



' Quills ' of porcupine, 1030 

 Quinquelociilina, 802 



R 



Radials of Anteclon, 901 



Radiating crystallisation, 1097 



Radiation of light in different media, 53- 

 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 ; zoii- 

 xanthellffi in, 848 ; bibliography of, 853 

 colonies of, 848 ; distribution of, 853- 

 854 ; mounting, 854 



Radiolariau, shells in ' ooze,' 1086 



Rainey, on presumed cause of cattle 

 plague, 752 ; 011 molecular coalescence, 

 1100 



1 tails, 011 British desmids, 579 note; 

 classification, 585; on 2V// :x<-/ii<t and 

 Bacillaria, 606 



Ramsdeii circles, 106 



Ramsden's' screw micrometer eye-piece,' 

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



Hn/il/i'ilrce; 599 



Raphides of Phanerogams, 696 ; of plants 

 and sponge-spicules compared, 860 



Rays, scales of, 1028 



