8 Golding Bird and Schäfer, 



With reg-ard to the elements of the other layers as figured by 

 Schwalbe, both the inner granules and ganglion -cells are represented 

 as oval, obliquely disposed cells, the former ceasing near the middle 

 of the fovea, the latter some little distance from the middle. At the 

 middle of the fovea only the cones and cone -fibres are represented, 

 with a very thin layer of molecular substance. The cone -fibre layer 

 is thicker than the cone -layer, and is moreover represented as being 

 quite as thick here as at the periphery of the fovea; in fact like the 

 cone -layer itself, it is drawn of the same thickness throughout the 

 section. In most other points the diagram is like that of Max Schnitze. 



Finally we may mention a figure by Cadiat^) which has been 

 copied into some text books of Physiology. In this representation 

 the fovea is a broad depression of the inner suiface and there is a 

 corresponding depression of the external limiting membrane. The 

 cone-nuclei are shown to be removed from the latter near the middle 

 of the fovea. But there has been no attempt to depict with accuracy 

 the number, size and relations of the retinal elements, so that the 

 figure, although correct in certain general features, is inaccurate as 

 regards the details, being rather the expression of a general impression 

 that an exact reproduction of the appearance of a specimen. 



The preparations upon which the observations to be recorded in 

 this paper are mainly based are from the retina, apparently perfectly 

 normal, of a lad of 15, fi-om whom the eye had been removed in 

 consequence of anterior staphyloma. 



After separation of the anterior part of the globe and the removal 

 of the vitreous humour from the posterior part, the latter was filled 

 with Ye 7o solution of chromic acid and placed in a quantity of the 

 same solution for thi-ee days. The preparation was then transferred 

 to a mixture of one part of glycerine to seven of methylated spirit 

 in wliich it remained for some days, it was then preserved in a mix- 



*) Anatomie Générale. 



