. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . nto the vitreous chamber. It appears by themirror to be a chocolate-brown color. Opaque nerve-fibre radiationsare seen to originate at the disc margins, whence they cross the back-ground and finally disappear from view at or near the fundalperiphery. PiciformesSulphur-breasted Toucan. Rhamphastus Icematus. Plate XLVI. The eyeground is dull gray in color, rather regularly spottedwith whitish-gray dots. The optic papilla is apparently composedof short, coarse, white fibres
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . nto the vitreous chamber. It appears by themirror to be a chocolate-brown color. Opaque nerve-fibre radiationsare seen to originate at the disc margins, whence they cross the back-ground and finally disappear from view at or near the fundalperiphery. PiciformesSulphur-breasted Toucan. Rhamphastus Icematus. Plate XLVI. The eyeground is dull gray in color, rather regularly spottedwith whitish-gray dots. The optic papilla is apparently composedof short, coarse, white fibres which form a sort of fringe all round itsmargins. Along each of its sides and parallel to its long diameter afew orange-red, choroidal vessels are seen. Radiating from thepapillary circumference are numerous opaque nerve fibres thatextend to the fundal periphery across the eyeground on all pecten is almost black-brown in color. Above the end of the optic nerve entrance and about half itslength to the nasal side are three dark-brown spots, clustered togetherand surrounded by a small gray reflex. 164 CARINATiE. Cuculiformes Plate XLV Cuculus canorus
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
