In the ‘Anatomische Anzeiger’ of 28th March, 1891, Froriep described, in a somewhat brief manner, the way in which the fibres of the optic nerve are developed in the embryo of Torpedo ocellata. The paper contains twelve outline figures, which satisfactorily indicate that in the case of Torpedo ocellata at least certain fibres of the optic nerve arise from nerve-cells or neuroblasts situated in that portion of the optic cup which will form the retina at a later stage of development.
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Richard Asshcton (1892) studied this question.
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