This canon is found in the Corpus Juris Canonici, Gratian’s Decretum, Pars I., Dist. xxxii., canon xxvij., but reads hostias instead of ostia, thus making the canon forbid the subdeacons to leave the Hosts; and to make this worse the ancient Glossator adds, “but the subdeacon should remain and consume them with the other ministers.” The Roman Correctors indeed note the error but have not felt themselves at liberty to correct it on account of the authority of the gloss. Van Espen remarks “To-day if any Hosts remain which are not to be reserved, the celebrant consumes them himself, but perchance in the time the gloss was written, it was the custom that the subdeacons and other ministers of the altar were accustomed to do this, but whenever the ministers present gradually fell into the habit of not receiving the sacrament, this consumption of what remained devolved upon the celebrant.”