. Bulletin - United States National Museum. Science. POLYCHAETE WORMS, PART 1 189 Postacicular setae long, smooth. Dorsal and ventral cirri small, conical. Branchiae (fig. 47c) begin on setigers 10-14 (setiger 10, ac- cording to Theel; setigers 12-14 on specimens examined), few in number (?) (at least 8 pairs on specimens examined, none complete posteriorly, may be lacking according to Friedrich, 1939). Branchiae are cirriform and may be curled inward. Biology.—A primitive type nephtyid dredged on bottoms of sand, muddy sand, mud, and globigerina Figure 47.—Nephtyidae, a, Nephlys longos
. Bulletin - United States National Museum. Science. POLYCHAETE WORMS, PART 1 189 Postacicular setae long, smooth. Dorsal and ventral cirri small, conical. Branchiae (fig. 47c) begin on setigers 10-14 (setiger 10, ac- cording to Theel; setigers 12-14 on specimens examined), few in number (?) (at least 8 pairs on specimens examined, none complete posteriorly, may be lacking according to Friedrich, 1939). Branchiae are cirriform and may be curled inward. Biology.—A primitive type nephtyid dredged on bottoms of sand, muddy sand, mud, and globigerina Figure 47.—Nephtyidae, a, Nephlys longosetosa, parapodi\im from middle region, posterior view, tips of notosetae not shown, h-c, Micronephthys minuta: b, parapodium from anterior region; c, parapodium from middle region, d, Nephtys paradoxa, parapodium from middle region, anterior view, e, Nephtys squaviosa, dorsal view two parapodia from middle 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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