. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 4. , I UPIII y-nine hours afier I'crl ili/at ion. Abbreviations as in Fig. 3. A. Normal larva. Side view. Mouth, stomach, and intestine are well- formed. The bristles on the left side only have birn drawn. B. Exogastrula (slightly flattened). Dorsal view. Only four of the eight bristles have been drawn. limited to little more than the anterior half of the larva; (3} the >!>••. el< .| .HP-HI oi i]i ii al i near i In- c.'.ip in i lie pn »totroch; ; I i In- appearance of contractions of the larva, albe
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 4. , I UPIII y-nine hours afier I'crl ili/at ion. Abbreviations as in Fig. 3. A. Normal larva. Side view. Mouth, stomach, and intestine are well- formed. The bristles on the left side only have birn drawn. B. Exogastrula (slightly flattened). Dorsal view. Only four of the eight bristles have been drawn. limited to little more than the anterior half of the larva; (3} the >!>••. el< .| .HP-HI oi i]i ii al i near i In- c.'.ip in i lie pn »totroch; ; I i In- appearance of contractions of the larva, albeit these contractions are considerably weaker than those of the normal larva; (5) the formation of two pairs of bristles of the same notched structure- as described lor the normal. Twenty-nine-hour Larva.—Normal (Fig. 4^4). The larva is begin- ning to assume the appearance of the fully-developed trochophore. The membrane is closely applied to the surface of tin- larva. The apical tuft has disappeared, and only the non-motile cilia remain at the anterior end. The prototroch is raised slightly, forming the so- called "hood fold" i Wilson, 1(J29). The single posterior cilium per- sists. The small yellow chromatophores are taking on a green tinge. The stiff dorsal cilia are longer and more numerous than in 1 he previous. 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
