. Annals of tropical medicine and parasitology. Parasites. i65 Vas deferens. The cirrus pouch is large and muscular, and the genital atrium runs anteriorly. Female genitalia. The ovary is situated in the middle of the segment, slightly posterior, and median to, the receptaculum seminis. It measures about 225/i broad and 6ofi long. Pst. ?'• ,; Fig. I. Monopylidium gallinarum, , horizontal stction. .4;//., anterior ; «. excretory vessel; 0., ovary ; Pst., posterior ; , receptaculum seminis ; (., testes ; v., vagina. X 50. Vagina. The receptaculum seminis measures abo
. Annals of tropical medicine and parasitology. Parasites. i65 Vas deferens. The cirrus pouch is large and muscular, and the genital atrium runs anteriorly. Female genitalia. The ovary is situated in the middle of the segment, slightly posterior, and median to, the receptaculum seminis. It measures about 225/i broad and 6ofi long. Pst. ?'• ,; Fig. I. Monopylidium gallinarum, , horizontal stction. .4;//., anterior ; «. excretory vessel; 0., ovary ; Pst., posterior ; , receptaculum seminis ; (., testes ; v., vagina. X 50. Vagina. The receptaculum seminis measures about 45/i by 15/i, and lies on the pore side of the ovary. The genital pores are unilateral and occur at the extreme anterior corner of the segment. The eggs lie in capsules, each capsule containing from five to nine. The outer egg-envelope measures about 35/x and the oncospheres about 25/i. Diagnosis. The number and size of the hooks, the position of the genital pore, the fact that all the segments are much broader than long, and the occurrence of numerous eggs in each capsule, differentiate this worm from any other species of the genus Monopylidium. Johnston (1911) discusses the relationship between the genera Monopylidium and Choanotaenia. We consider our species to be new and have therefore named it M. gallinarum. Diorchis sp. {americana ? Ransom, 1909) Several specimens from a hen, Calcutta, Bengal, India, collected by the author in 1915. The only points in which our specimens differed from D. americana. Ransom, were as follows :— Length Breadth Rostellar hooks Hooks on suckers Our specimens 16 mm. o"4 mm. absent absent D. americana 20-25 mm. 0*6 mm. Ten present present. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Liverpool School of Tropical Medicine. Liverpool University Press [etc. ]
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