276. Defcription of ibe Eye of the Seal, 



The choroid coat adhered very firmly to the 

 fclerotis. It was black on its pofterior furface, 

 but grey on its anterior. 



The iris was black on both its furfaces, and 

 was evidently a continuation of the choroides. 

 The pupil was remarkably fmall, forming an 

 aperture no larger than -might be made by the 

 punaure of a middle-fized pin. The figure of 

 the pupil, before the iris had been touched, was 

 that of an equilateral triangle. , ,^ . 



The cryftalline humour was nearly fpheri- 

 cal- if there were any deviation from a fphere, 

 it was by approaching to the figure of an oblate 

 fpheroid. The ciliary proceffes were attached 

 to the equatorial part of the cryftalline humour, 

 if I may be allowed the expreffion. 



At firft fight, the optic nerve feemed to be 

 inferted in the axis of the pupih but, upon 

 making a longitudinal incifion through the nerve, 

 quite down to^ the retina, I found that its infer- 

 tion was on the inner fide of that axis, as in 

 other animals. The fubftance which furrounded 

 the optic nerve was fibrous, and, fpreading itlelt 

 out every way as it approached the fclerotis, was 

 continued into the fubftance of that coat In- 

 deed the fclerotis feemed to be formed by the 

 fibrous fubftance which accompanied the optic 

 nerve, only, after this fubftance had diverged a 

 little way from the nerve, it became compad, as 

 the fclerotic coat ufually is. The optic nerve was 



fomewhat 



