Taylor (1928), in an attempt to infect starlings with the gapeworm, was able to infect six starlings out of fifteen which had been dosed, nine of which died before any observations could be made. The value of this experiment is, however, somewhat doubtful owing to the possibility of previous infection in the starlings experimented with, and the author concludes that in one bird, such was the case, owing to the size of the worms found.

During the latter half of 1930 and the beginning of the present year some miscellaneous experiments on Ascaris in pigs were carried out at the Institute of Agricultural Parasitology by Professor Leiper and myself. Although these experiments were of a preliminary nature it was thought that some of the observations made during their course might be of interest to other workers in this field and they are, therefore, placed on record.

Since the introduction of carbon tetrachloride for the treatment of the hookworm infestations of man it has been ascertained that in certain conditions fatal poisoning may follow oral administration of the drug. If carbon tetrachloride is given in cases of alcoholic cirrhosis of the liver, or if alcohol is taken immediately after the drug, severe gastro-intestinal symptoms are to be anticipated with death in two or three days. Davis (1924) showed that in dogs the toxicity of the drug was intimately associated with certain dietetic factors. He found that a high carbohydrate diet enabled the liver to withstand relatively large doses of the drug. High protein diets also protected the liver against injury (although less efficiently than carbohydrate) but an “all-fat” diet was invariably associated with extensive damage to the hepatic parenchyma. Lambert (1923) while carrying out hookworm treatment on a large scale in Fiji found that where a patient was heavily infested with Ascaris lumbricoides as well as with hookworm it was unwise to exhibit carbon tetrachloride without first getting rid of the ascarids.

The material here described was obtained from the large intestine of a Humboldt's Woolly Monkey (Lagothrix humboldtii) which died at the Zoological Gardens, London, about a month after it had been received there. In addition to the Enterobius infection there was a severe infection with Ascaris lumbricoides, involving both liver and small intestine. A single specimen of Necator was present, and along with the Enterobius were two immature female worms of doubtful identity, which are also described in this paper.

In June, 1930, the writer received from Mr. T. Meyer of Onderstepoort, some parasites collected from a red hartebeest at Gobabis in South West Africa. The examination of this material revealed the presence of rather long slender worms which could not be allocated to any of the known genera of the sub-family Trichostrongylinœ, Leiper, 1908. The genus Longistrongylus is proposed for the reception of this species which is named Longistrongylus meyeri gen. and sp. nov., in honour of the collector and donor.

At the beginning of this year, a Malay Tiger (Felis tigris) which had been nearly two years in the Edinburgh Zoological Gardens, died. On post mortem examination, it was found to harbour Dibothriocephalus felis, Galoncus perniciosus and Toxascaris leonina in its small intestine; and Paragonimus westermani, Capillaria sp. (a single female) and the three nematodes which are the subject of this paper, in its lungs.

In a Tasmanian Devil (Sarcophilus harisii) which died last year in the Scottish Zoological Park, there were found examples of Oochoristica dasyuri, Alaria sp., and the following species of Trichostrongyle worm which appears to be new to science.

In the original paper dealing with this interesting nematode a fairly complete account was given of its discovery, its life-history in the free-living condition and within the host. In addition, its effect on the host, whereby flies of both sexes are sterilised owing to its presence, was also described. Its occurrence in both the stem and panicle generations of frit-flies attacking oats was recorded and figures were presented showing the incidence of infection in flies of these two generations. At the same time the inference was drawn that the parasite must also occur in the over-wintering generation of the frit-fly, larvæ of which attack wild grasses or winter cereals. Observations were therefore necessary on flies of this generation emerging during 1930 to prove conclusively the presence of the parasite. These observations are dealt with in the present paper and figures are given showing the degree of infestation in both male and female flies.

In June, 1931, some specimens of field-grown peas infested by eelworms were sent for diagnosis to the Institute of Agricultural Parasitology by Mr. H. W. Thompson, of Cardiff University. The plants were found to be very heavily attacked by Heterodera schachtii in early stages of development.