. Bulletin - United States National Museum. Science. Fig. 427.—Eustrongylides tubifek. a, Male tail; 5, heiad end; c, female tail. Aftek Jaegerskiold, 1909 Female 35 to 44 mm. long by to 3 mm. wide. Vulva near anus (fig. 427 c). Vagina 11 mm. long. Eggs 65 to 75/x. long by 44ju wide, oval with blunt ends and thick shells, the latter pitted. Life history.—Unknown; probably involves intermediate stages in fish, according to Jaegerskiold and to Ciurea (1924). Larvae described as Filaria cystica by Rudolphi from under the peritoneum and in the muscle of certain fish (Symbranchus laticaudatus a
. Bulletin - United States National Museum. Science. Fig. 427.—Eustrongylides tubifek. a, Male tail; 5, heiad end; c, female tail. Aftek Jaegerskiold, 1909 Female 35 to 44 mm. long by to 3 mm. wide. Vulva near anus (fig. 427 c). Vagina 11 mm. long. Eggs 65 to 75/x. long by 44ju wide, oval with blunt ends and thick shells, the latter pitted. Life history.—Unknown; probably involves intermediate stages in fish, according to Jaegerskiold and to Ciurea (1924). Larvae described as Filaria cystica by Rudolphi from under the peritoneum and in the muscle of certain fish (Symbranchus laticaudatus and Galaxias scriba) were regarded by Jaegerskiold as the larva of a species of Eustrongylides; see E. ignotu-s, p. 371. Recently Ciurea has found similar larvae in certain fish ( fluviatilis, Lota lota, Esox lucius, and Perca fluviatilis) in the Danube and regards them as larval forms of some species of this genus. As E. tubifex is the type species of the genus, Ciurea's larvae are figured here (fig. 428 a to d) to show the probable nature of the larval Eus- trongylides, the specific identity of the larvae not being ascer-. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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