. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1. An oocyte and a ripe egg of Paraccutrotus liruins; 30 minutes after insemination. 310 X. l'"i(.ri<K 2. Oocyte ni I'lit-iiccutrolus In-idits. c<i. 25 minutes after insemination. 330 X. l-'iGi/RE 3. Oocyte of I'Miinnit'cliini/x microtuberculatus in meiotic division. Penetration of M vend Nperniato/oa lias provoked the formation of mitotic figure*. 325 X. FIGURE 4. I'^« of I'siiiiniiccliiniis microtuberculatus about 70 minutes after insemination. 325 X. FIGURE 5. KKK of Paracentrotus li-riihis. four minutes after
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1. An oocyte and a ripe egg of Paraccutrotus liruins; 30 minutes after insemination. 310 X. l'"i(.ri<K 2. Oocyte ni I'lit-iiccutrolus In-idits. c<i. 25 minutes after insemination. 330 X. l-'iGi/RE 3. Oocyte of I'Miinnit'cliini/x microtuberculatus in meiotic division. Penetration of M vend Nperniato/oa lias provoked the formation of mitotic figure*. 325 X. FIGURE 4. I'^« of I'siiiiniiccliiniis microtuberculatus about 70 minutes after insemination. 325 X. FIGURE 5. KKK of Paracentrotus li-riihis. four minutes after fertilization. 350 X. I-'K.I in, o. I-'.^KS of I'dnifcntrotus liridus, tvo minutes after insemination, exposed to 0.01% brilliant cresyl blue, reception cone visible in the proximal region of the egg. 310 X. FIGURE 7. Oocyte of 1'araccntrotus lii'ulux, tvo minutes after insemination, exposed to <l.0lr; brilliant cresyl blue: photographed 35 minutes later. 310 X. 136. 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