. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. STEM CELL DEVELOPMENT 43. Figure I. Ten-hour planula. The young larva is 350 urn long and 170 fim wide. A, apical end; B, basal end. Bar = 50/jm. Figure 2. Forty-eight-hour pre-metamorphic planula. The ciliated larva moves with its enlarged apical end (A) directed forward. It is 900 pm long, ^m wide in the apical region, 70 ^m wide in the mid area, and 50 /xm wide at the basal end. B. basal. Bar = 100 ^m. Figure 3. Attached metamorphosing planula. The original anterior, apical end (A) of the larva attaches to the substr
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. STEM CELL DEVELOPMENT 43. Figure I. Ten-hour planula. The young larva is 350 urn long and 170 fim wide. A, apical end; B, basal end. Bar = 50/jm. Figure 2. Forty-eight-hour pre-metamorphic planula. The ciliated larva moves with its enlarged apical end (A) directed forward. It is 900 pm long, ^m wide in the apical region, 70 ^m wide in the mid area, and 50 /xm wide at the basal end. B. basal. Bar = 100 ^m. Figure 3. Attached metamorphosing planula. The original anterior, apical end (A) of the larva attaches to the substrate and flattens over it while the original basal end (B) contracts towards the attached end. Thus the animal becomes short and fat. measuring 320 /im long, 160 fim wide in the apex, 93 ^m wide in the middle, and 45 urn wide in the basal region. Bar = 50 jim. Figure 4. Disc stage. The disc is a flattened ball, 180 tim in diameter, on the substrate. Bar = 50 ^m. Figure 5. Pawn stage. The base (B) of the pawn, now considered the posterior end of the animal, arises from the apical end of the planula. The anterior, apical region (A) of the pawn, derived from the basal region of the planula. forms the head and tentacles of the primary polyp. Small amounts of perisarc mate- rial (arrow) are deposited at the base. The pawn is 350 ^m tall. 160 ^m wide in the anterior head, 73 ^m wide in the mid-stalk, and 106 ^m wide at the posterior base. Bar = 50 ^ 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
