( 244 ) 



" on its oiitfide by fix mufcles, by \vhich tlie eye may be moved in 

 " any dirc(^Uon. 



" Choroides. Uvea. Iris. 



" Under the fclerotica is a membrane, known by the name of the 

 " choroides ; it is a foft and tender coat, com poled of innumerable vef- 

 •' fcls ; it is concentric to tlic fclerotica, and adheres clofely to it by a 

 " cellular fubftaiice, and many velTels. This membrane is outwardly 

 " of a brown colour, but inwardly of a more rufl'et brown, almoll 

 " black. Like the fclerotica, it is diftinguiflied by two different names, 

 " the fore part being called the uvea, while the hinder part retains 

 " the name of the choroides. 



" The fore part commences at the place where the cornea begins ; 

 " it here attaches itfclf more ftrongly to the fclerotica by a cellular 

 " fubftance forming a kind of white narrow circular rim : the cho- 

 " roides Separates at tliis place from the fclerotica, changes its 

 " direftion, turning, or rather folding, directly inwards, towards the 

 " axis of the eye, cutting the eye as it were tranfverfely : in themid- 

 "■ die of this part is a round hole, called the pupil, or fight of the eye : 

 " the pupil is not exa611y in the middle of the iris, that is to fay, the 

 " centers of the pupil and iris do not coincide, the former being a lit- 

 " tie nearer the nofe than the latter. 



" This part, when it has changed its direflion, is no longer called 

 " the choroides ; but the anterior i'urface, which is of different co- 

 " lours, in different fubje^ts, is called the iris ; the pofterior furface 

 " is called the uvea, from the black colour with which it is painted. 

 " The iris has a i'mooth velvet-like appearance, and feems to confifl: of 

 " fmall filaments regularly difpofed, and directed towards the center 

 " of the pupil. 



" The eye is denominated blue, black, &c. according to the colour 

 " of the iris. The more general colours are the hazel and the blue, 



