. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . er until justbefore the macula is reached, when theydisappear altogether. At about a long papillary diameter fromthe superior end of the pecten and on itsnasal side, is a large, circular, partly pig-mented, disc-like macular region arrangedwithin and somewhat exceeding the limitsof the retinal band. It has, in its turn, acentral, depressed lighter area, surroundedby a small ring of pigment. The pecten covers the optic entrance, andhas the steam radiator-like form of theW
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . er until justbefore the macula is reached, when theydisappear altogether. At about a long papillary diameter fromthe superior end of the pecten and on itsnasal side, is a large, circular, partly pig-mented, disc-like macular region arrangedwithin and somewhat exceeding the limitsof the retinal band. It has, in its turn, acentral, depressed lighter area, surroundedby a small ring of pigment. The pecten covers the optic entrance, andhas the steam radiator-like form of theWonga Dove. However, this species ex-hibits 24 convolutions, the free border showsthree definite elevations above and it has adeep, opaque keel to which all 12 doublefolds are firmly united. The angle made by projecting the majoraxis of the oval optic papilla until it bisectsthe lower border of the retinal band, theinfulapapillary angle, is, approximately, 70°. In injected specimens of this species (aswell as occasionally in individuals not sotreated) the choroidal vessels show veryplainly. 74 THE FUNDUS OCULI OF BIRDS. Fig. 122. Dark-bodied Shearwater (Puffinus grisetis) X9.
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
