THE ANNALS AND MAGAZINE OF NATURAL HISTORY. [EIGHTH SERIES.] No. 92. AUGUST 1915. XIII. — A Trematode from Protopterus. By H. A. Baylis, B.A. (Published by permission of the Trustees of the British Museum.) Through the kindness of Mr. G. A. K. Marshall, of the Imperial Bureau of Entomology, an opportunity has recently been afforded me of studying a very interesting little Trema-tode parasite from the intestines of an African mud-fish (Protopterus cethiopicus) . A considerable number of specimens of the worm were obtained by Dr. G. D. H. Carpenter at Lake Victoria, Uganda. The species, which I believe to be new to science, possesses not only a borrowed interest on account of the much-discussed position of its host in the animal kingdom, and the fact that its parasites have not (so far as I am aware) hitherto been explored, but also considerable intrinsic interest on account of certain structural peculiarities and its probable systematic relationships. It is much to be regretted that the material was imperfectly fixed and rather macerated, rendering the cutting of satis-factory sections difficult, so that some of the details of the anatomy must remain for the present doubtful. The main features, however, have not been difficult to make out, and in collecting the data for the following description I have relied as far as possible upon specimens either temporarily cleared and mounted in creosote or stained and mounted whole in Ann. & Mag. N. Hist. Ser. 8. Vol. xvi. 7
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