. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B FIGURE 2. The cryptoniscus larva of Stegophryxus hyptiits. A. Young larva showing color pattern when in phase 1. The light cross-shaped area is devoid of chromatophores. B. Older cryptoniscus in phase 3 with contracted melanophores forming an interrupted stripe on each side. by expanded black chromatophores. Their distribution is as follows: present laterally on the head and segments 1, 4, 5, 6, 7, and 8; present centrally on seg- ments 11 and 12; absent from segments 2, 3, 9, 10, 13 and the uropods. The eyes have also bec
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B FIGURE 2. The cryptoniscus larva of Stegophryxus hyptiits. A. Young larva showing color pattern when in phase 1. The light cross-shaped area is devoid of chromatophores. B. Older cryptoniscus in phase 3 with contracted melanophores forming an interrupted stripe on each side. by expanded black chromatophores. Their distribution is as follows: present laterally on the head and segments 1, 4, 5, 6, 7, and 8; present centrally on seg- ments 11 and 12; absent from segments 2, 3, 9, 10, 13 and the uropods. The eyes have also become black. The yellow chromatophores are now more noticeable and have become restricted to segments 1 to 11 inclusive where they are present laterally. In phase 3 (Fig. 2B) the black chromatophores are much fewer in number and are all in the contracted state. They form a broken chain on each side of the body about midway between the center and margin of the dorsal surface, reaching from segment 1 to segment 8 inclusive, but absent on segment 3. On segments 10 and 11 there are a few black chromatophores centrally located. Yellow chromatophores are intermingled with the black in the same chain but extend from segment 1 to segment 11. The eyes are black. In this stage the cryptoniscus is ready for the molt which will transform it into a juvenile female of the first postlarval 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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