. The microscope and its revelations. ltel-meeres,in Abhandlungen der /,-<inii//. Al;ml. • ;:n lii-rlin, 1858, andseparately published; also lYber die ini Ilufen von Messina beohuehteten Poly-i-I/H!.r>, pp. 071-(i7(i. - l>n liiiiUnlnrim (Rhizopnda Hadiarial, Berlin, 18(>2. This pvaf \vork hasl;itc] v been followed by a gigantic monograph published in the Challenger Reports, EADIOLARIA 847 and since that time much has been added by various observers toour knowledge of this group, which still remains, however, veryimperfect. Each individual radiolarian consists of two port
. The microscope and its revelations. ltel-meeres,in Abhandlungen der /,-<inii//. Al;ml. • ;:n lii-rlin, 1858, andseparately published; also lYber die ini Ilufen von Messina beohuehteten Poly-i-I/H!.r>, pp. 071-(i7(i. - l>n liiiiUnlnrim (Rhizopnda Hadiarial, Berlin, 18(>2. This pvaf \vork hasl;itc] v been followed by a gigantic monograph published in the Challenger Reports, EADIOLARIA 847 and since that time much has been added by various observers toour knowledge of this group, which still remains, however, veryimperfect. Each individual radiolarian consists of two portions of colouredor colourless sarcode—one portion nucleated and central, the otherportion peripheral, and almost always containing certain yellowcorpuscles. These two portions are separated by a membrane calledthe capsule ; but this is so porous as to allow of their free communi-cation with each other. The inner central capsule is also the special \. PIG. 644. — Fossil Radioluriu from Barbadoes : a, Poilocijtiin n/ifni; It,Bhabdolithus sccptrtim ; c,Lychnocaniumfalciferum ; d, Eucyrtidiumtitbiilus; c, Fliisl rclln concentrica;f,Lychnocanium Inccrn/i ; g,E>ic//r-tidiuiii ehfjdiis; ll, Dictyospyris rlnfl/n/s ; /, M<ni<ilfu /•! ;k, StcjrfiditalitJtis spinescens , I, S. notluxn : ///, Lithni-i/i-lin m-rlJiin; /i,si/lri/ni ; , Podocyrlix i-utJm nmfn ; j>, Rhabdolithuspipa. organ of reproduction, for it is the intracapsular protoplasm, withthe nuclei imbedded in it, which serves for the formation of flagellatespores ; the outer capsule has the special office of protecting andproviding nourishment for the The pseudopodia radiate in alldirections (fig. 645) from the deeper portion of the extracapsularsarcode ; they have generally much persistency of direction and very which extends over 1,800 pages, and is illustrated by 140 plates. In it are described4,318 species, of which 3,508 ar
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
