. Bulletin - United States National Museum. Science. POLYCHAETE WORMS, PART 1 185 Description.—Length up to 20 mm., width up to iiini., seg- ments up to 70. Body elongated, shghtly flattened, subrectangular in cross section. Prostomium (fig. 46,a,6) subconical, slightly flattened, without eyes, with 4 vciy small subequal anterior antennae (the antennae may be rather indistinct and easily overlooked). Buccal segment without appendages, ventrally forming lateral lips to the funnel-shaped mouth. Fh^st setiger unu'amous, with bilobed presetal lip and single conical postsetal lip, with single b
. Bulletin - United States National Museum. Science. POLYCHAETE WORMS, PART 1 185 Description.—Length up to 20 mm., width up to iiini., seg- ments up to 70. Body elongated, shghtly flattened, subrectangular in cross section. Prostomium (fig. 46,a,6) subconical, slightly flattened, without eyes, with 4 vciy small subequal anterior antennae (the antennae may be rather indistinct and easily overlooked). Buccal segment without appendages, ventrally forming lateral lips to the funnel-shaped mouth. Fh^st setiger unu'amous, with bilobed presetal lip and single conical postsetal lip, with single bundle of compound setae; dorsal cirri rudimentary; ventral cirri cylindrical; ventrally forms lower lip of mouth. Parapodia bu-amous, supported by acicula, with rami well separated, similiar along length of body, becoming thinner and more elongate pos- teriorly, with long cilia along the interramal parapodial border, forming. Figure 46.—Paralacydoniidae, Paralacydonia paradoxa: a, dorsal view anterior end; b, same, ventral view; c, left middle parapodium, posterior view; d, notoseta; e, spinigerous heterogomph compound neuroseta;/, distal tip of stem of same, with blade broken 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
