. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. vn. B Ti vi FIG. .x A. Section showing vitelline plugs closing the birth-pores. L—lumen, }'f—vitelline plug, Vm—vitelline membrane, B—birth-pore. B. Section of an ovary at 10 X-15. O—ovum, /•"—empty follicle, J>—clrlle. At 90 the Xiplioplionts embryo is so long that in the ovisac the ani- mal forms a complete loop, keeping its tail on the anterior part of the head. When released it straightens out to about mm. (Figs. 11 and 12. Plate III). The \olk sac is an irregular mass which in preserved material shows a numb
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. vn. B Ti vi FIG. .x A. Section showing vitelline plugs closing the birth-pores. L—lumen, }'f—vitelline plug, Vm—vitelline membrane, B—birth-pore. B. Section of an ovary at 10 X-15. O—ovum, /•"—empty follicle, J>—clrlle. At 90 the Xiplioplionts embryo is so long that in the ovisac the ani- mal forms a complete loop, keeping its tail on the anterior part of the head. When released it straightens out to about mm. (Figs. 11 and 12. Plate III). The \olk sac is an irregular mass which in preserved material shows a number of distinct parts. Anteriorly are the heart and vitelline veins, then the yolk proper which as an almost bipartite mass occupies ventral and lateral positions. In the notch between the halves of the yolk are two swellings, the liver and the ccelom. The opercukc now arc' conspicuous as they stand out from the head and are studded with many large chroinatophores. The dorsal and anal tins. 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
