. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESORPTION OF CONCEPTUSES. 301 as number 2047, the amnion is preserved and distended as shown in Fig. 9. Both chorion and amnion are macerated and distended with clear fluid and it seems strange indeed that the embryo and the yolk sac may disappear completely without even a final clouding of the amniotic fluid. There may have been temporary clouding, but every now, and then a specimen is received in which both the vesicles are distended with absolutely clear. FIG. 9. Gross appearance of abortus No. 2047 showing a large blood

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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESORPTION OF CONCEPTUSES. 301 as number 2047, the amnion is preserved and distended as shown in Fig. 9. Both chorion and amnion are macerated and distended with clear fluid and it seems strange indeed that the embryo and the yolk sac may disappear completely without even a final clouding of the amniotic fluid. There may have been temporary clouding, but every now, and then a specimen is received in which both the vesicles are distended with absolutely clear. FIG. 9. Gross appearance of abortus No. 2047 showing a large blood clot con- taining a transparent chorionic and an empty amniotic vesicle. X 3. fluid, a fact which also implies that autolysis of the embryo occurred without digestion of the enveloping amnion. Since only a pseudo-decidua forms, and then but rarely and very early, in cases of tubal pregnancy, the sequence of events leading to dissolution of- the conceptus must be rather different. There can be no accumulation of blood in a capsularis. Hence the conceptus usually becomes isolated in blood or blood clot within the tube, and undergoes degeneration as the hemorrhage. 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 work.. 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