VOLUME 25 JAKUARY, 1958 NUMBER 1 PROCEEDINGS of The Helminthological Society of Washington A semi-annual journal of research devoted to Helminthology and all branches of Parasitology Supported in part by the Brayton H. Ransom Memorial Trust Fund EDITORIAL COMMITTEE GILBERT F. OTTO, 1959, Editor Abbott Laboratories AUREL 0. FOSTER, 1960 LOUIS J. OLIVIER, 1961 Animal Disease and Parasite National Institutes of Health Research Division, U.S.D.A. ALBERT L. TAYLOR, 1958 CLARK P. READ, 1962 Crops Research Division, Johns Hopkins University TJ.S.D.A. Subscription $3.00 a Volume; Foreign, $3.25 Published by THE HELMINTHOLOGICAL SOCIETY OF WASHINGTON Copyright © 2011, The Helminthological Society of Washington VOLUME 25 JANUARY, 1958 NUMBER 1 THE HELMINTHOLOGICAL SOCIETY OF WASHINGTON The Helminthological Society of Washington meets monthly from October to May for the presentation and discussion of papers. Persons interested in any branch of parasitology or related science are invited to attend the meetings and participate in the programs. Any person interested in any phase of parasitology or related science, regard- less of geographical location or nationality, may be elected to membership upon application and sponsorship by a member of the society. Application forms may be obtained from the Corresponding Secretary-Treasurer (see below for address). The annual dues for either resident or nonresident membership are four dollars. Members receive the Society's publication (Proceedings) and the privilege of publishing (papers approved by the Editorial Committee) therein without additional charge unless the papers are inordinately long or have excessive tabulation or illustrations. Officers of the Society for the year 1958 Year term expires (or began) is shown for those not serving on an annual basis. President: JOHN S. ANDREWS Vice-President: LLOYD E. EOZEBOOM Corresponding Secretary-Treasurer: EDNA M. BUHEEE Recording Secretary: MADISON S. ERISCOE Librarian: MILDRED A. Doss (1945 ) Archivist: JOHN T. LUCKEE (1945 ) Representative to Washington Academy of Sciences: DONALD B. MCMTTLLEN Executive Committee Memoers-at-Large: GEORGE W. LTJTTERMOSER, 1959 CARLTON M. HERMAN, 1958 PROCEEDINGS OF THE SOCIETY The Proceedings of the Helminthological Society of Washington is a medium for the publication of notes and papers presented at the Society's meetings. How- ever, it is not a prerequisite for publication in the Proceedings that a paper be presented before the Society, and papers by persons who are not members may be accepted provided the author will contribute toward the cost of publication. Each volume of the Proceedings consists of two numbers, issued in January and July. Manuscripts may be sent to any member of the Editorial Committee. Manu- scripts should be typewritten (double spaced) and submitted in finished form for transmission to the printer. Except in the case of preliminary papers to be pub- lished in extenso later, a manuscript is accepted with the understanding that it is not to be published, with essentially the same material, elsewhere. The Editorial Committee assumes no responsibility for statements appearing in authored articles. To appear in the January number, manuscripts should be received not later than November 15th; to appear in the July number, not later than May 15th. Proof.—Whenever possible galley proof will be sent to authors for verification. Beprints are furnished at cost in accordance with the schedule of prices printed below. Unless otherwise specified in the order, reprints are furnished without covers. The order for reprints should be submitted when proof is returned except in the ease of authors not residing in the continental United States or Canada when the order for reprints should accompany the manuscript. No. Pages 1-2 3-4 5-8 9-12 13-16 17-20 50 copies 5.88 6.25 10.00 13.50 15.19 21.44 100 copies 6.81 7.39 11.25 15.13 17.71 24.69 Add'l 100 1.88 2.25 2.50 3.25 4.81 6.50 Covers: 100 copies 6.00; Additional 100 2.38. Proceedings of previous meetings.—Independent publication of the Proceed- ings began in 1934. Prior to this date the Society's proceedings were published in Science (1911-1913) and, later, in the Journal of Parasitology (1914-1933). A few sets of these early proceedings as well as the back volumes of the PROCEED- INGS are available. For information write the corresponding secretary-treasurer (see below). Semittances should be made payable to The Helminthologieal Society of Washington and sent to the corresponding secretary-treasurer. Correspondence concerning business items should be addressed to the cor- responding secretary-treasurer, Edna M. Buhrer, Section of Nematology, Plant In- dustry Station, Beltsville, Md.; concerning manuscripts to the editor, Gilbert F. Otto, Parasitology Department, Eesearch Division, Abbott Laboratories, North Chicago, Illinois. Copyright © 2011, The Helminthological Society of Washington PROCEEDINGS OF THE HELMINTHOLOGICAL SOCIETY OF WASHINGTON VOLUME 25 JANUARY, 1958 NUMBER 1 Three new digeiielic trematodes, Ernoleptalea proteropora, 11. sp., (Cephalogoniinidae: Cephalogoniminae), Phyllodisto- muni symmetrorchis, n. sp, and Phyllodistomum ghanense, n. sp., (Gorgoderidae: Gorgoderinae) from West African freshwater fishes. J. I). THOMAS* Zoology Department, University College of Ghana, Achimota, Accra. With the exception of the investigations of Szidat (1932), Joyeaux, Gendre and Baer (1928) and Dollfus (1929, 1932) there are only a few scattered references to trematodes of West Africa. Fish trematodes in par- ticular have received little attention, and further information on the taxo- noinic and geographical affinities of these seem desirable. The present paper describes trematodes from fishes collected by the writer in the Black Volta river system and the Birim river in the Gold Coast in 1956. One new species of trematode, Alloc.reuflium roltamim. has already been de- scribed by the writer from this area (Thomas, in press). The fishes were netted by the staff of the Government Fishery Department. The gills, skin, alimentary canal, urinary bladder and other organs were examined for parasities soon after capture. The trematodes were fixed under slight pressure from a cover slip in corrosive acetate. All measurements, therefore, apply to slightly flattened specimens and are presented in milli- meters. Emoh'ptalca prolc>-opora,i\. sp. (Fig. 1 & 2) DESCRIPTION*: Body short, oval in outline; with a posterior notch; 0.67 to 0.95 long; 0.61 to 0.65 broad at widest point. Body surface, except for cuticu- lar linings of suckers and small region posteriorly, armed with transverse rows of backwardly directed, conical spines; circumoral spines, up to 0.017 long, appreciably longer than spines over rest of body. Oral sucker, almost spherical in shape; 0.125 to 0.155 in diameter; 0.025 to 0.045 from anterior extremity. Ventral sucker in anterior half of body; separated from oral sucker by a distance, equal to, or slightly greater than maximum width of cirrus pouch; 0.15 to 0.18 long; 0.15 to 0.18 broad; slightly larger than oral sucker. Opening of oral sucker ventrally directed; its cavity leading into a very short prepharynx; pharynx pyriform; 0.045 to 0.065 long; 0.050 to 0.065 broad; sur- rounded by glandular cells; pushed antero-laterally in n few, contracted speci- mens by cirrus pouch; oesophagus short; gut caoca postero-laterally directed; terminating midway between ventral sucker and posterior testis. Excretory vesicle Y shaped, bifurcating at level of posterior testis; main stem in median line opening ventrally, 0.020 from the posterior end. Genital pore median, on ventral surface of dorsal lip, in front of oral sucker; male and female pores close together in genital atrium. Testes, paired; compact; broadly oval or globular "The author wishes to acknowledge the kind help of Mr. S. Pmdhoe of the British Mu- suein (Natural History), London, in connection with the examination of records and speci- mens. Thanks are also due to Professor E. E. Edwards-for his interest in the work, to the Fisheries Department in Ac;ra for assistance in obtaining material and to the University College of the Gold Coast for financial aid. Copyright © 2011, The Helminthological Society of Washington PROCEEDINGS OF THE [VOL. 25, No. 1 structures; diagonally arranged; immediately behind ventral sucker; 0.10 to 0.12 long; 0.1.05 to 0.145 broad; intertesticular space absent or roughly equal to length of testes; cirrus pouch S shaped; extending to posterior border of ventral sucker; basal portion with bipartite vesicula seminalis; middle region with pars prostatica; narrow terminal region with ejaculatory duct extending below gut caecum and pharynx before turning dorsally to open into the genital atrium. Ovary pyriform; amphitypic; either to left or Fig. 1. E-molcptalca proteropora, n. Fig. '2. Emolcptalca proteropora, n. sp., ventral view. sp., sagittal section showing position of genital pore. ABBREVIATIONS a.l.ex.u.—anterolateral int. c.—intestinal caecum re. se.—receptaculum excretory vessel 1. e.—Lanrer's canal seminis c. eh.—central chamber m. gl.—-Mehlis's gland t.—testis of Mehlis's gland m. v. d.—median yolk ti—anterior testis c. o. s.—circum oral spine duct, t»—-posterior testis c. s.—cirrus sac int.—metraterm tr. vit.—transverse c. sp.—cuticular spine o. s.—oral sucker vitelline duct e. d.—ejaculatory duct oe.—oesophagus ut.—uterus e. lit.—eggs in uterus ov.—ovary v. de.—vas deferens ex. p.—excretory pore ovd.—oviduct v. ef.—vas efferens ex. ves.—excretory vesicle ph.—pharynx v. s.—ventral sucker g.—ganglion po.—posterior excretory ves. sem.—vesicula g. a.—genital atrium duct seminalis g. p.—genital pore p. p.—pars prostatica vit.—vitelline glands gl. c.—gland cell pro.—prostatic cells vit. r.—vitelline reservoir Copyright © 2011, The Helminthological Society of Washington JANUARY, 1958] HELMTNTHOLOGICAL SOCIETY 3 right of ventral sucker, rarely extending behind it; 0.130 to 0.135 long; 0.125 to 0.120 broad; oviduct directed obliquely forward to centre of body, to form the ventrally directed ootype after receiving duct of receptaculum seminis and median vitelline duct dorsally; Mehlis's gland poorly developed.