Abstract
The statement of Granit1 that the guinea pig has a ‘pure rod eye’ calls for comment. Franz2, referring to a paper of his own published in 1909, says that cones are missing from the retina of the guinea pig. Ovio3 admits the presence of a few cones. Kolmer4 describes cones and rods. He makes the significant remark that observation prior to his own had been made on poorly fixed material. Rods are four to five times as numerous as cones, and he comments on the clear vacuoles at the peripheral end of the cone myoids.
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References
Granit, R., J. Physiol., 103, 103 (1944).
Franz, V., "Vergleichende Anatomie des Wirbeltierauges", in "Handbuch der ergleichende Anatomie der Wirbeltiere", 2, pt. 2, 1,238. (Vienna: Bolk/Goppert/Kallius/Lubosch, 1934.)
Ovio, J., "Anatomie et physiologie de l'Å"il dans la série animale", 139 (Paris, 1927).
Kolmer, W., "Vergleichende Anatomie der Netzhaut", in "Handbuch der Mikroskopischen Anatomie des Menschen", 3, pt. 2, 321–326 (Fig. 259), 420–21 (Berlin, 1936).
Walls, G. L., Arch. Ophthal., 12, 1918 (1934).
Kolmer, W., ibid., 318 (Fig. 251 A).
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O'DAY, K. Visual Cells of the Guinea Pig. Nature 160, 648 (1947). https://doi.org/10.1038/160648a0
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DOI: https://doi.org/10.1038/160648a0
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