Pacchionian-like bodies in the human canal of Schlemm.

As long ago as 1876 Key and Retzius suggested that the canal of Schlemm was like a dural venous sinus, and Rochon-Duvigneaud (1892) was insistent on this point. Also, Wegefarth (1914), in experiments on the cerebro-spinal fluid, which ran parallel with those ofWeed (1914), showed that Pacchionianlike bodies occurred in Schlemm's canal in cats, dogs, rabbits, and monkeys. Since, however, this way of thinking is by no means universal, this article attempts to show that Pacchionian-like bodies occur normally in the canal of Schlemm in man. Now haematoxylin and eosin, and van Gieson, are invaluable stains, but