. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . screw type. Passeriformes. B. Acryomodi. Chimney Swallow. Hirundo rustica. Plate L. The general color of the eyeground is warm gray, tinted slightlywith yellow or buff, and covered with minute, dull, yellowish pale orange (choroidal) vessels are seen near the upper ex-tremity of the optic nerve-entrance. There are visible two macularregions, one on each side of and above the upper end of the show as small brown areas or dots in
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . screw type. Passeriformes. B. Acryomodi. Chimney Swallow. Hirundo rustica. Plate L. The general color of the eyeground is warm gray, tinted slightlywith yellow or buff, and covered with minute, dull, yellowish pale orange (choroidal) vessels are seen near the upper ex-tremity of the optic nerve-entrance. There are visible two macularregions, one on each side of and above the upper end of the show as small brown areas or dots in the eyeground. Sur-rounding the temporal macula is a slight reflex, apparently com-posed of minute, bright gray dots. The macula on the nasal sideis quite devoid of this reflex-ring. The optic papilla, long and narrow, tapers at its upper end. Oneither side of the disc, and at right angles to it are a few, fine, dull-gray opaque nerve-fibres. The chocolate-brown, convoluted pecten is quite narrow at itsjunction with the optic nerve, but it gradually becomes wider andmore massive as it approaches the lens. 168 Passeriformes Plate XLIX Pitangus derbian us
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
