.10 



X. M. HANCOX AXD B. BOOTIIROYD 



Fig. 11. Ruffled border folds enclosing collagen fibrils. (X 30,000.) 

 Fig. 12. Collagen fibril surrounded by ruffled border folds. Channels lead 

 off from the fold and end, apparently, in a saclike vesicle (arrow). (X 35,000.) 



