Abstract
In a recent paper (Morgan & Wilson, 1938) the authors gave an account of a general survey of helminths in poultry in Scotland and pointed out that Heterakis gallinae was by far the most common species occurring in this host and that 82·3% of the birds examined were infected. Not only was the incidence high, but heavy infestations amounting to hundreds of worms were frequently found in these birds which had picked up the worms under natural conditions.