96 VETERINAKY OPHTHALMOLOGY. 



to the border of the lens and, dividing, goes to each 

 surface, leaving between its separating surfaces a trian- 

 gular space, called the canal of Petit. This pectinate 

 ligament {Ligamentura Fectinatwii) is that portion of 

 connective tissue where the iris is joined to the sclera 

 at the edge of the cornea. The suspensory ligament of 

 the lens is permeable, transfusion from the vitreous 

 to the aqueous taking place. Chauveau says: "The 

 anterior or ciliary zone includes two parts : the 

 ' ciliary circle ' (or ligament) and the ' ciliary body.' 

 The ciliary circle, ligament or muscle {cmnulus alhidus) 

 varies in width from one to two millimetres ; its external 

 face adheres closely to the sclerotic and its internal is 

 confounded with the ciliary body; the posterior border 

 is continuous with the choroid zone near the canal of 

 Fontana (ciliary canal). The anterior border gives 

 attachment to the greater circumference of the iris." 

 This is a portion of Chauveau which I will explain later, 

 for as it now stands it is not over easily grasped. To 

 quote still further : " The ciliary body {corpus ciliare) 

 forms a kind of zone or ring, wider than the ciliary 

 ligament, and consequently overlaps the latter before 

 and behind. It extends on one side on the inner face 

 of the choroid and on tlie other on the posterior face of 

 the iris." The fibers of the ciliary muscle are of the 

 unstriped variety, and in different parts of the muscle 

 they take different directions, the whole combined 

 making a muscle of triangular shape. This is the 



