ACCOMMODATION AND CONVERGENCE 65 



muscle, so that the most anterior portion of the perichoroidal 

 space is entirely free from any such fibers. If the uvea be 

 separated from the sclerotic some of the anterior and external 

 of the cells of the ciliary muscle may be found attached 

 to the latter coat, being situated between the layers of 

 what elsewhere forms the lamina fusca. 



In some animals, as pointed out by Kalt, at the termi- 

 nation of the ciliary body posteriorly, in the spaces of the 

 lamina suprachoroidea left empty by undeveloped muscle 

 fibers, a layer of large cells is met with continuous behind 

 with the endothelial cells of the choroid. 



In pathological specimens, where, as the result of edema 

 of the ciliary body, or as the result of traction from fibrous 

 bands on its inner surface, its tissue has been much spaced 

 out, I have met with large cells between the muscle fibers, 

 suggesting in their appearance transitional stages between 

 endothelial cells and muscle cells. 



Muscle fibers, or at anv rate cells which cannot be dis- 



u 



tinguished from them, are met with in isolated patches of 

 the external surface of the choroid; thus Salzmann 31 writes: 

 'If one follows the suprachoroidea from behind forward 

 new structural elements, smooth muscle fibers, appear even 

 in the equatorial region, or, at times, still farther posterior, 

 therefore in the territory of the choroidea. They are grouped 

 in bundles singly, or for the most part branched, and then 

 forming three or more rayed stellate little figures- 'muscle 

 stars. ' " 



Fuchs, 32 in a recent article, has described how he found 

 muscle fibers in the lamina suprachoroidea in the neighbor- 

 hood of the papilla in frontal sections through the optic 

 disk. 



The above facts, taken together, all tend to show that 



the spindle-shaped cells composing the ciliary muscle are 

 5 



