. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 2. (A, B) Light photomicrographs of the formation of the larval gut in 2-arm clones of Ophio- plwlis aculeata. (C) Photomicrograph of a 4-arm pluteus produced from released posterolateral arms of primary juvenile. (D) Photomicrograph of a primary pluteus resulting from fertilization of an ovum and development of the zygote. In cloned larvae, the archenteron (ar) gives rise to the esophagus (es), stomach (SI), and intestine (not shown). The mouth (asterisk) opens from the exterior into the esophagus, but it is not know
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 2. (A, B) Light photomicrographs of the formation of the larval gut in 2-arm clones of Ophio- plwlis aculeata. (C) Photomicrograph of a 4-arm pluteus produced from released posterolateral arms of primary juvenile. (D) Photomicrograph of a primary pluteus resulting from fertilization of an ovum and development of the zygote. In cloned larvae, the archenteron (ar) gives rise to the esophagus (es), stomach (SI), and intestine (not shown). The mouth (asterisk) opens from the exterior into the esophagus, but it is not known if it forms at the opening of the archenteron (blastopore analog) or elsewhere. As in primary larvae, the antenor coelom arises from the tip of the archenteron and later divides to form the right and left axohydrocoels (arrowheads). The 4-arm asexually produced pluteus (C) is morphologically similar to a primary pluteus (D) except for pigment in the epidermis (seen as dark spots in this micrograph) and disproportionately longer posterolateral arms (pa), aa, anterolateral arm; bl, blastocoel; ep, epidermis; sr, skeletal rod. Scale bars = 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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