. Bulletin - United States National Museum. Science. 166 BULLETIN 140, UNITED STATES NATIONAL MUSEUM the body the striations are very prominent and produce the appear- ance of the body being crenated. Head (figs. 237# and b and 238a) elaborate; 2 lateral lips, large and semilunar at the wide anterior edge, and 2 small interlabial median lobes. Each of the lateral lips has 3 teeth on its inner surface. Male 15 to 20 mm. long by 500 to 550/x wide. Cloacal aperture 1/22 of total length from posterior end. Caudal region (fig. 237c), recurved toward the ventral face, sometimes even twisted in a spi
. Bulletin - United States National Museum. Science. 166 BULLETIN 140, UNITED STATES NATIONAL MUSEUM the body the striations are very prominent and produce the appear- ance of the body being crenated. Head (figs. 237# and b and 238a) elaborate; 2 lateral lips, large and semilunar at the wide anterior edge, and 2 small interlabial median lobes. Each of the lateral lips has 3 teeth on its inner surface. Male 15 to 20 mm. long by 500 to 550/x wide. Cloacal aperture 1/22 of total length from posterior end. Caudal region (fig. 237c), recurved toward the ventral face, sometimes even twisted in a spiral; caudal alae wide, longitudinally striated. Six pairs of pedunculated papillae, of which 4 are preanal, 2 postanal. Spicules unequal, the one to mm. long, slender and pointed, the other only 310/x. (Linstow) or 180/x long (Railliet and Henry), thick and ending in a hook with rounded point (fig. 238c).. 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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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
