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Keywords from Image Description:
Origin of Vertebrates Fig . Fig Retina and Optic Nerve of Petromyzon After Mller and Langerhans On the left side the Mllerian fibres and pigmentepithelium are represented alone The retina is divided into an epithelial part the layer of visual rodcells and neurodermal or cerebral part which is formed of the ganglion of the optic