. Bulletin - United States National Museum. Science. NEMATODE PARASTTES OF BIRDS 219 but his illustration and magnification show this an error) to 287 and 234/x long (Linstow, 1895), the right 34 and the left 31t* wide, according to Linstow, or both M/x wide, according to Mueller (1897). Female 23 mm. long. Vulva (fig. 283) somewhat anterior to mid- dle of body, or 10 mm. from head end, according to Schneider. Eggs thick-shelled, elliptical, ^ by ,* (Linstow, 1873), or 39/* by 26ti (Linstow, 1895).. Figs. 281-282.—Acuakia axtiuris. 281, Male tail, a, Cross section ; b, ventral view. Af
. Bulletin - United States National Museum. Science. NEMATODE PARASTTES OF BIRDS 219 but his illustration and magnification show this an error) to 287 and 234/x long (Linstow, 1895), the right 34 and the left 31t* wide, according to Linstow, or both M/x wide, according to Mueller (1897). Female 23 mm. long. Vulva (fig. 283) somewhat anterior to mid- dle of body, or 10 mm. from head end, according to Schneider. Eggs thick-shelled, elliptical, ^ by ,* (Linstow, 1873), or 39/* by 26ti (Linstow, 1895).. Figs. 281-282.—Acuakia axtiuris. 281, Male tail, a, Cross section ; b, ventral view. After Schneider, 1SGG. 282, «., Male tail X about 50 ; b, female tail end. After Linstow, 1873 Life history.—Unknown; Linstow (1895) found an encapsulated larva in Gam-marus pulex which he regarded as possibly this species. Distribution.—Europe. It has unfortunately, but quite naturally, happened that many of the older genera have poorly described and little known species as types. This is the case with Acuaria, type A. anthuris, and this is one reason for the complicated relationships of Acuaria, Spiroptera, Anthuris, and Dispkaragus; a well described and commonly known type species aids in the definition of a genus and in the efforts to. 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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