About the middle of June, 1931, the writer received from the Ministry of Agriculture Plant Pathological Laboratory some diseased specimens of carrots which had been growing at Chatteris, Cambridgeshire, where they had been obtained by Mr. Thomas of the School of Agriculture, Cambridge. Microscopic examination showed that they were attacked by Anguillulina dipsaci, and since this is the only record of the parasite on this host or, in fact, on any member of the natural order, Umbellifer it has been thought advisable to give an account of the chief symptoms of the disease shown by the plants.

In January, 1930, some free-living nematodes belonging to the genus Rhabditis were sent to Professor Leiper by Dr. Broughton-Alcock, who had found them in some fungal slime and débris accumulated in the drip from an ice-chest. Herein they are described as a new species of the genus, being named after the finder, and in view of their somewhat unusual habitat, some observations were made on the temperature reactions of the worms. The medium in which they were found proved unsuitable for the purpose of culturing, and at the suggestion of Professor Leiper a suspension in water of a mixture of powdered charcoal and faæ was used, which has proved very successful. Since January, 1930, pure cultures of the nematodes have been kept in this medium in the Department of Helminthology.

In August of the present year, specimens of young field-grown parsnips and carrots, showing heavily galled roots, were sent to this Institute by Mr. L. Ogilvie. The galls were found to result from eelworm infection, Heterodera radicicola being present in considerable numbers in the affected tissues.

During recent years the writer has had occasion to infest many rabbits with cercarial cysts of Fasciola hepatica. In all but three instances the infested rabbits have been killed within about ten weeks of the commencement of the experiment. These three rabbits remained infested over a long period and are the subjects of this note. They were kept under conditions which appeared to exclude all opportunity for further fluke infestation and no accidental infestation has been observed among the considerable number of similar rabbits used in other experiments during these years.

During the examination of an abnormal specimen of the Scottish Red Deer (Cervus elaphus) in the winter of 1930, my colleague, Mr. W. C. Miller, M.R.C.V.S., discovered several specimens of a bursate nematode lying on the connective tissue between the latissimus dorsi and the external intercostal muscles. Struck by the unusual habitat of such a worm, search was subsequently made in similar situations in other deer, and in two animals the same parasite was found.

In the course of searching for references to helminth infections in a species of deer, at the request of one of the Bureau's correspondents, it became apparent that the great majority of the helminths either were parasites of sheep and cattle also, or were closely related thereto. In view of the further fact that some deer are of considerable economic importance and are widely scattered over the surface of the earth, it was decided to extend the scope of the search so as to include all deer from which helminthic parasites have been recorded. This information has here been tabulated, with the addition of some necessary comments and a list of the relevant references.