Les Carnivores malgaches sont rares et difficiles à capturer et, les Nématodes qui les parasitent ne sont pas encore connus. Nous désirons dédier la première espèce étudiée à la mémoire du Docteur P. L. LeRoux, en souvenir de l'amitié dont il nous honora, et en respectueux hommage à la mémoire de ce grand helminthologiste.

Fourteen species of parasitic worms recovered from Adenota kob thomasi (P. L. Sclater) in Uganda, Africa, are recorded.

The morphology of two tapeworms, Moniezia monardi Fuhrmann, 1931 and Avitellina buechneri sp. nov., is described in detail and discussed.

Haemonchus similis Travassos, 1914 is recorded from Fiji for the first time. The third stage infective larva of H. similis is briefly described. Attention is drawn to the similarity of this larva to that of H. contortus of sheep and some of the implications are discussed.

The intestinal parasite Polymorphus minutus sometimes causes severe losses of domestic ducks, but more often birds on free range are unaffected although exposed to infection. The causes of this are examined and an attempt is made to explain it. The worm has no innate seasonal occurrence, but can survive for many months in the intermediate host, by which it can also be spread for long distances along streams. The veterinary implications of these findings are considered.

While working on the cranial nerves of the Nile fish Clarias lazera Cuvier and Valenciennes, my attention was drawn to the presence of a very large number of trematode larvae on the brain. Subsequently twenty-four fishes were examined, both from the White Nile and the Blue Nile in Khartoum area in the Sudan, and twenty-two fishes were found to be heavily infected, each with several hundreds of the parasite. The parasite was identified through the help of Dawes' book—The Trematoda—and after feeding experiments, as Diplostomulum tregenna the larval stage of Diplostomum tregenna Nazmi Gohar, 1932. The parasite was found above or in front of the brain in the fat tissue, in the cranial cavity. Closer examination did not reveal the presence of the parasite in the brain tissues and its cavities, nor in the eyes, two of the most common places in which the majority of similar larvae occur. In some of the heavily infected fishes haemorrhage occurred which may suggest that the parasites reached the brain through the blood stream.

1. Acanthostomum gymnarchi (Dollfus, 1950) is redescribed and the atrophy of the right caecum and the presence of an anal pore at the end of the left caecum were observed in this species.

2. The genera Atrophocaecum Bhalerao, 1940; Gymnatotrema Morosov, 1955; and Haplocaecum Simha, 1958 are considered synonyms of the genus Acanthostomum Looss, 1899 which is here divided into four subgenera.

3. Acanthostomum bagri Thomas, 1958 is considered a synonym of A. absconditum (Looss, 1901).

4. A key to the five species of Acanthostomum found in the Sudan is provided.

1. Brevicaecum niloticum McClelland, 1957 is redescribed and differences from the original description are pointed out.

2. The characters of the genus Brevicaecum are amended.

3. A new subfamily Brevicaecinae is erected for the genus Brevicaecum.

Several specimens of this species were collected by the writer from the intestine of the Nile soft shelled turtle Trionyx triunguis (Forskal) (= T. niloticus) from the White Nile near Khartoum area in the Sudan.

1. Dipetalonema dracunculoides (Cobbold, 1870), has been found in dogs (Canis familiaris), in the Turkana District of Kenya and in a hyaena (Crocuta crocuta), in the Southern Rift Valley.

2. The dimensions of six male and six female worms agree with previous descriptions from hyaenas and dogs in Africa and from dogs in Portugal.

3. Infective larvae were found in seven out of ten Hippobosca longipennis taken from a heavily infected dog.

4. Morphologically the infective larvae are similar to those of other Dipetalonema spp., but they are much larger, averaging 2,400μ in length and 35μ in breadth with a tail length of 85μ.

5. In Africa the distribution of the parasite coincides with the distribution of H. longipennis on dogs and hyaenas.

6. This is the first time that a hippoboscid fly has been incriminated as the vector of a filarial worm. It is suggested that many other filarial species may be transmitted by Hippoboscidae.

The members of the genus Falcaustra are mainly parasites of tortoises. Of the 17 species of Falcaustra described from Asia, only 2 are parasitic in amphibians. Baylis (1933), recorded 3 species of Falcaustra from Malayan tortoises and Balasingam (1961), recorded another from Testudo emys from Malaya. The present paper records for the first time 3 new species of Falcaustra from Malayan amphibians for which the following names are proposed: Falcaustra purchoni sp.nov., F. pahangi sp.nov. and F. dubia sp.nov.