Abstract
Since the beginning of October, 1923, the writer had the opportunity of collecting helminths from 25 horses slaughtered in Edinburgh, and from 20 horses and one donkey slaughtered in London. The Edinburgh material was collected during the months October, November and December from aged horses, the London material during February, March and April, likewise from aged horses and from a very old donkey. The donkey was found to harbour at least 26 species of nematodes, 15 of which have not hitherto been recorded from England. From the horses examined in London, 38 species of helminths were obtained, 19 of which are new to England, and in Edinburgh 38 species, 11 of which have not hitherto been recorded from Scotland.

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