Vid.-Selsk. Skr. I. M.-X. Kl. 1922. No. 4. 



PI. VIII. 



Fig. 18 shows how one of the long con- 

 necting fibres from the sphincter attaches 

 itself to the dilatator. At the point of attach- 

 ment muscle-cells appear to be increased in 

 number, x about 200. 



\ 



4L^ 



Fig. 19. A photograph of a long connecting 

 fibre; highly magnefied, to show the rod- 

 like nuclei of the plain-muscle cells. 

 Preparation depigmented. 

 X about 400. 



Fig. 20 shows one of the short connecting fibres with its pigment cells, in which short oval nucley 

 are seen. The nuclej^ are marked by the broken lines. Preparation not depigmented, x about 250. 



Fig. 2 1 . General view of a de- 

 pigmented section, showing 

 how the long connecting fibres 

 draw out the epithelium into 

 blind diverticula. The back 

 layer of the epithelium is not 

 affected by this, but continues 

 without change of direction 

 up to the pupil, a. The peri- 

 phery of the sphincter, b. The 

 diverticul. x about 90. 



