Four genetta retinas
Date
ca.1901
Creator
A. W. Head (British) , Draughtsman
Object type
Archive reference number
Material
Dimensions
height (card support): 185mm
width (card support): 220mm
width (card support): 220mm
Subject
Content object
Description
Anatomical study of four retinas as seen through an ophthalmoscope. The eyes belong to four eutherian mammals from the Viverridae family, a pardine genet Genetta pardina, a common genet Viverra genetta, a common paradoxurus Herpestes griseus and a spotted ichneumon Herpestes neoalensis.
In the top two and the bottom right specimens, the fundus [interior surface] is depicted as containing three zones: a peripheral zone of purple, red and orange respectively, a pale green intermediate zone and a central zone of pale yellow. The fundi are covered with small dots.
The bottom right specimen is divided into two zones only. Brown dots are very prominent on the peripheral zone, and green on the central zone.
The discs are round and varying in colour, though all are surrounded by a bright coloured fringe, mostly emerald green. The main retinal vessels are depicted as passing largely on the diagonal from the disc to the periphery.
Created for inclusion in George Lindsay Johnson's paper ‘Contributions to the comparative anatomy of the mammalian eye, chiefly based on ophthalmoscopic examination’ published in the Philosophical Transactions of the Royal Society B, Volume 194 (1901). Only one is incorporated as a plate in the final publication, the retina of the common genet, plate eight, p.91.
George Lindsay Johnson (1853-1943) British ophthalmologist carried out extensive research in optics, and is best known for his work on mammalian eyes. He was not a Fellow of the Royal Society.
In the top two and the bottom right specimens, the fundus [interior surface] is depicted as containing three zones: a peripheral zone of purple, red and orange respectively, a pale green intermediate zone and a central zone of pale yellow. The fundi are covered with small dots.
The bottom right specimen is divided into two zones only. Brown dots are very prominent on the peripheral zone, and green on the central zone.
The discs are round and varying in colour, though all are surrounded by a bright coloured fringe, mostly emerald green. The main retinal vessels are depicted as passing largely on the diagonal from the disc to the periphery.
Created for inclusion in George Lindsay Johnson's paper ‘Contributions to the comparative anatomy of the mammalian eye, chiefly based on ophthalmoscopic examination’ published in the Philosophical Transactions of the Royal Society B, Volume 194 (1901). Only one is incorporated as a plate in the final publication, the retina of the common genet, plate eight, p.91.
George Lindsay Johnson (1853-1943) British ophthalmologist carried out extensive research in optics, and is best known for his work on mammalian eyes. He was not a Fellow of the Royal Society.
Related fellows
George Lindsay Johnson (1853 - 1943, British) , Ophthalmologist
Associated place