Contributions to a knowledge of Australian Entozoa. No. iii. - On some species of Holostomidae from Australian birds

Abstract

In the present paper, five species of Holostoynidce, all parasites of Australian birds, are described as new. Two of them are referred to the genus Hemistomum, and three to the genus Holostomum. They were all collected by Dr. J. P. Hill, Demonstrator of Biology at the University of Sydney, and formed part of a collection of Trematodes and Cestodes given by him to me for investigation. In addition to the collection of worms, I am indebted to Dr. Hill for some valuable preparations of some of the specimens and notes as to their location in their hosts, kc. Dr. Brandes' ' Monograph on the Holostomidse,' published in the Zoologischer Jahrbiicher, Band v., has been of especial use to me in the preparation of this paper. The lengths given are measured along ventral body wall. Hemistomum triangulare, sp.n. (Plate v., figs. 1-6.) Length 2-3 mm. ; tlie anterior region shorter than the posterior, about one-third of the total length. The flattened anterior bodyregion is triangular in shape, the mouth opening situated at the apex of the triangle; the lateral edges strongly curved round (PI. V, fig. 5).