. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 18 DAVID G. COOK DESCRIPTION. Length 7 mm, diameter to mm. 40 segments. Pro- stomium longer than it is hroad at peristomium. Setae, except ventrals of segment XI, bifid with upper tooth equal to, or shorter and thinner than lower tooth (Fig. 6b). Setae 45 to 55 p. long, 4 to 6 per bundle anteriorly, 4 to 5 per bundle poste- riorly. Ventral setae of segment X unmodified. 2 to 3 (rarely 4) slightly curved, simple-pointed penial setae, 55 to 70/x long, present (Fig. 6c). One pair sper- mathecal pores in anterior part
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 18 DAVID G. COOK DESCRIPTION. Length 7 mm, diameter to mm. 40 segments. Pro- stomium longer than it is hroad at peristomium. Setae, except ventrals of segment XI, bifid with upper tooth equal to, or shorter and thinner than lower tooth (Fig. 6b). Setae 45 to 55 p. long, 4 to 6 per bundle anteriorly, 4 to 5 per bundle poste- riorly. Ventral setae of segment X unmodified. 2 to 3 (rarely 4) slightly curved, simple-pointed penial setae, 55 to 70/x long, present (Fig. 6c). One pair sper- mathecal pores in anterior part of segment X, in line with ventral setae. Male pores just lateral to penial setae. Pharyngeal glands extend into segment V. Chlorogogen cells begin in segment VI. Atria pear-to-comma-shaped, shorter than vasa deferentia which join atria apically. Vasa deferentia 100 to 130/* long, to p. diameter. Atria 70 to 120 /LI long, 30 to 35 /j. diameter. Anterior prostate gland enters atrium near vas deferens, posterior one 10 to 40 /*. from the male pore (Fig. 6a). Penes absent. One pair spermathecae with long, thick ducts and cylindrical ampullae, open near septum 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
