Habitat.—Found in sputum of patient by King in St. Lucia. Normal host probably a carnivore.
Fig. 337.—Syngamus kingi: anterior end of male. (After Leiper.)
Fig. 338.—Syngamus kingi: anterior end of female. (After Leiper.)
Family. Physalopteridæ.
Genus. Physaloptera, Rudolphi, 1819.
Mouth surrounded by two large lateral lips bounded posteriorly by a cuticular band projecting anteriorly, forming a collar. Each lip bears anteriorly and inwardly a cuticular appendage, the external tooth. Immediately below and internal to the external teeth the internal teeth, one on each lip. Each lip bears two large submedian papillæ. Tail of male with four pairs of pedunculated papillæ in a row on each side external to the six pairs of unpedunculated papillæ. Spicules unequal. Vulva in the anterior region of the body. Eggs with a characteristic thick smooth shell.