In the course of an examination of unidentified Zoological material in the London School of Hygiene and Tropical Medicine, I recently came across a species of filarial worm from the portal vein of a North American Snake, Coluber melanoleucus, which I name Macdonaldius seetai n.g., n.sp.

The material listed here was obtained by Dr. W. K. Blackie and Mr. W. A. McDonald during a helminthological expedition from the London School of Hygiene and Tropical Medicine to Southern Rhodesia in 1930–31. The writer is indebted to Professor R. T. Leiper for the privilege of examining and reporting on this collection of parasites. The domestic animals in question are sheep, goat, pig and cattle and although they appear to have produced no forms new to science, it is believed that the publication of this collection, inasmuch as it appears to be the only one of its kind from Southern Rhodesia, is a contribution to our knowledge of an important parasitic group.

In the spring of 1932, Mr. Otto Schierbeck, Chief Forester for the Province of Nova Scotia, forwarded several Black Ducks (Anas rubripes) which he had collected in a dead or dying condition on the shores of Cole Harbour, Nova Scotia, to the Animal Diseases Research Institute, Hull, Quebec. Mr. Schierbeck stated that the ducks had arrived there on their northward migratory flight six weeks earlier than usual, and after a period of hardship, had commenced to die in large numbers; and although the popular belief was that starvation was the cause of these deaths, he was not convinced that this was the case, owing to the apparently short period between the first signs of sickness and death.

Page 8, line 6 from top, for Eleophora read Elaeophora.

Page 126, line 5 from bottom, for spingle-shaped read spindle-shaped.