. The microscope and its revelations. wo conjugating filaments are nearly or quite morpho-logically alike, there must clearly be •&, physiological differentiation,since the conjugation takes place in one direction only. Whereconjugation occurs between cells in the same filament, this sexualdifferentiation must be ascribed to the individual cells. Multipli-cation by does not take place among the Conjugatse. From the composite motile forms of Protococcus the transitionis easy to the group of Volvocineae, an assemblage of minute plantsof the greatest interest to the microscopist, on a
. The microscope and its revelations. wo conjugating filaments are nearly or quite morpho-logically alike, there must clearly be •&, physiological differentiation,since the conjugation takes place in one direction only. Whereconjugation occurs between cells in the same filament, this sexualdifferentiation must be ascribed to the individual cells. Multipli-cation by does not take place among the Conjugatse. From the composite motile forms of Protococcus the transitionis easy to the group of Volvocineae, an assemblage of minute plantsof the greatest interest to the microscopist, on account both of theanimalcule-like activity of their movements and of the great beautyand regularity of their forms. The most remarkable example of this-Tonp is the well-known 1 t/lo/xtlnr (Plate VI). which is notuncommon in fresh-water pools, and which, attaining a diameter ofabout -,,, or even ..,, of an inch, may be seen with the naked eyewhen the drop containing it is held up to the light, swimming through PLATE VI. a. a b3
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
