. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. Fig. 28.—Astacns flm-iatUis.—A, a vertical section of the eye-stalk (X 6) ; B, a small portion of the same, showing the visual ap- paratus more highly magnified ; a, cornea ; h, outer dark zone ; c, outer white zone ; d, middle dark zone ; e, inner white zone ; /, inner dark zone ; cr, crystalline cones ; g, optic ganglion ; oj>, optic nerve ; sj). striated spindles. of the general curvature of the outer face of the cornea; the inner contour sometimes exhibits a slight deviation. Please note that these images are ex

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. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. Fig. 28.—Astacns flm-iatUis.—A, a vertical section of the eye-stalk (X 6) ; B, a small portion of the same, showing the visual ap- paratus more highly magnified ; a, cornea ; h, outer dark zone ; c, outer white zone ; d, middle dark zone ; e, inner white zone ; /, inner dark zone ; cr, crystalline cones ; g, optic ganglion ; oj>, optic nerve ; sj). striated spindles. of the general curvature of the outer face of the cornea; the inner contour sometimes exhibits a slight deviation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Huxley, Thomas Henry, 1825-1895. New York, D. Appleton and company

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Keywords: ., bookauthorhu, bookcentury1800, bookdecade1880, booksubjectzoology