Transactions . Specimen No. 2. A human cyclops, showing the disc with two retina] and two hyaloid artorii s. Fig. Specimen No. 2. Trail bion of the optio nerve. 280 MISCELLANEOUS. The choroid and sclera were present and showed no special change. The optic nerve on transverse section showed no differ-entiation into its component parts except that it was ovalin shape. It consisted of a mass of cells which extendedback in the nerve sheath behind the optic foramen, andwere evidently cells of the primary optic stalk. The Fig. 43.

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Keywords: ., bookcentury1800, bookdecade1880, bookpu, booksubjectophthalmology