. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 120. American Coot (Fulica americana) Fig. 121. Great Crested Grebe (Podicipes cristatus) Appearances of the Fundus Oculi in the Preserved Eyes of Birds. THE FUNDUS APPEARANCES IN VARIOUS ORDERS OF BIRDS 73 quadrants of the fundus by the mirror) verysensitive to light there is no other ophthal-moscopic indication of a macular region. The long optic disc is white, with a fewtiny pigment dots about its margins. Thepecten is lighter brown than in
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 120. American Coot (Fulica americana) Fig. 121. Great Crested Grebe (Podicipes cristatus) Appearances of the Fundus Oculi in the Preserved Eyes of Birds. THE FUNDUS APPEARANCES IN VARIOUS ORDERS OF BIRDS 73 quadrants of the fundus by the mirror) verysensitive to light there is no other ophthal-moscopic indication of a macular region. The long optic disc is white, with a fewtiny pigment dots about its margins. Thepecten is lighter brown than in the majorityof birds; it is very large, almost hidingthe disc from view. Many opaque nervefibres radiate from the papillary circum-ference and extend several disc breadthsacross the fundus. Owing to the large sizeof the pecten and the small pupil it is im-possible to obtain a satisfactory lateral viewof the pecten, which almost covers the pupil-lary area with its massive club-shaped end. The American congener of this bird—Fulica americana—has a fundus almost identi-cal, ophthalmoscopically,with this species. Ipecaha Rail. Aramides ipecaha. Theophthalmoscopic pict
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
