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Abstract

This study reports the results of a light microscope examination of the eyes from 12 Aotes trivirgatus. Direct comparisons were made with the retinae of Macaca cynomologus and Macaca mulatta treated in the same way and stained at the same time.

Both rods and cones are present in all Macaca retinae examined but never seen in the retinae of Aotes. The fovea of Macaca is described and the distribution of retinal but an increase in the number of ganglion cells in the fundus indicates an area centralis. Myelin staining is found in the optic fiber layer and inner plexiform layer of Aotes but not Macaca.