A contribution to the anatomy of the amphibian and reptilian retina / by J.W. Hulke.

  • Hulke, J. W. (John Whitaker), 1830-1895.
Date:
[between 1870 and 1879?]
Catalogue details

Licence: Public Domain Mark

Credit: A contribution to the anatomy of the amphibian and reptilian retina / by J.W. Hulke. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    ^ c/D o: 3 S, g ^ ellcome ID b2245021x X r. r S C 00 •< ? ? i let No. TRACTS 1788(61 L c , {Reprinted from the Royal London Ophthalmic Hospital Reports.^ A CONTRIBUTION TO THE ANATOMY OP THE AMPHIBIAN AND REPTILIAN RETINA. By J. W. Hulke. \ After working for several years at the huma'ft^^in^i^while seeking, in the spring of 1862, for the axial fibre **5&scrlbecl by Ritter, in the frog’s rod-shaft, I beeame much impressed with the value of a comparative study of this coat; and meeting with H. Muller’s comprehensive article on the Vertebrate Retina, in Siebold and Kolliker’s Zeitschrift, I was encouraged by that great anatomist’s example to com- mence a study which should embrace all classes of vertebrata. Having begun with the frog, I decided to continue to work upon amphibia and reptiles, intending afterwards to go back to fishes. In the autumn I communicated to the Royal Society an account of the retina of the frog, black and yellow salamander, common snake, blind worm, Spanish gecko, water and land tortoises, and turtle. A precis of this paper, necessarily very short and unillustrated, was published in the Society’s Proceedings. During the past summer I have gone over much of the ground again, verifying my former conclusions in every important particular. I now offer the readers of this journal the results of the whole investigation in these two classes of vertebrate animals. In all the species which I have examined, a uniform type of structure occurs, and this is subject to modifications which show how well founded was Muller’s anticipitation that a special study would bring out specific characters which would enable the anatomist, from the examination of a piece of retina, to name not only the class, but the genus and species. Enumerated in order from the choroidal surface inwards, the following layers are recognisable :— 1. Layer of rods and cones = Bacillary L. = Jacob’s membrane. 2. Layer of Outer granules.