Systematic studies on the helminth parasites of pigs in India have appeared in papers by Maplestone (1930), Maplestone and Bhaduri (1937, 1942), Bhalerao (1924, 1931, 1935), Baylis (1939), Mudaliar and Gopalakrishnan (1938), Buckley (1939), Chatterjee (1939), Mukerjee (1945, 194G, 1948), Wolfgang (1953), Peter (1954). Srivastava and Peter (1954), Varma (1954), Ramanujachari and Alwar (1954), Sinha and Srivastava (1956), Thapar (1956), Sinha (1957), Alwar (1958) and Ahluwalia (1959, a, b; 1960, a, b, c). These studies are mostly in regard to the infestations encountered among pigs from scattered areas in India. Maplestone, Bhalerao and Baylis in their work have, however, compiled all the then available reports and also given brief descriptions of the species known to parasitise Indian pigs.

1. A new species Choanotaenia larimarina sp.nov. from the greater black-backed gull (Larus marinus) is described.

2. A comparison is made with other species of Choanotaenia which possess a reticulate uterus.

3. Because the uterus breaks down in only one of these four species it is suggested that in this type of development the breakage may be due to mechanical stretching of the tubule in the gravid segment.

4.If this be true then the portion of the uterine wall which envelops the egg is not a uterine capsule in the accepted sense.

The purpose of this paper is to bring together all the information available on the helminth parasites known to occur in domesticated animals in Kenya. Several reports have been made by various workers over the past fifty years but these are scattered throughout the literature. Of the principal authors, Daubney (1926, 1933) has recorded many of the Nematodes, and Hudson (1934) published a list of the Cestodes known to occur in mammals, birds and reptiles in East Africa. Dinnik (1951, 1952, 1954, 1959, 1961a, 1961b, 1962) and Dinnik and Dinnik (1954–55, 1954, 1960) have recorded the Trematode species found in cattle, sheep and goats in East Africa.

Page 207 and elsewhere for “H. J. Wong” read “H. Y. Wong”.

Page 219, line 12 from top—and last reference on page 220—for “Rao 1930” read “Rao 1938”.