. The microscope and its revelations. \ FIG. 460.—Rhizo- FIG. 4Gl.—AcJmanthes solenia imbri- longipes: a, b, c, d, e, •rtta. frustules in different stages of binary divi- FIG. 462. — Gomphonemti gemi-natum: its frustules connected bya dichotomous stipe. S1O11. Another family in which there is a dissimilarity in the twolateral surfaces is that of the Achnanthece, the frustules of whichare remarkable for the bend they show in the direction of theirlength, often more conspicuously than in the example here repre-sented. This family contains free, adherent, and stipitate forms,one of the most commo
. The microscope and its revelations. \ FIG. 460.—Rhizo- FIG. 4Gl.—AcJmanthes solenia imbri- longipes: a, b, c, d, e, •rtta. frustules in different stages of binary divi- FIG. 462. — Gomphonemti gemi-natum: its frustules connected bya dichotomous stipe. S1O11. Another family in which there is a dissimilarity in the twolateral surfaces is that of the Achnanthece, the frustules of whichare remarkable for the bend they show in the direction of theirlength, often more conspicuously than in the example here repre-sented. This family contains free, adherent, and stipitate forms,one of the most common of the latter being Achnanthes longipes(fig. 461), which is often found growing on marine alga?. Thedifference between the markings of the upper and lower valves ishere distinctly seen ; for, while both are traversed by stria?, whichare resolvable under a sufficient power into rows of dots, as well as B
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
