. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE BIOLOGY OF LATERNULA TRUNCAT. 523 (usually) 2-3 /A in diameter, but sometimes as large as 5 /x. The crypt cells (CC) possess flagella (FL) 25 /x long. Small pyramid shaped darkly staining cells (DA) in the crypts resemble those thought by Owen (1970) to be secretory in Cardinal. Similar cells have been observed in Halicardia by Nakazima (1927). Another condition encountered in L. tmncata was of breakdown (Fig. 11B) both of the digestive cells, to produce large fragmentation spherules (FS), and of the flagellated crypt ce
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE BIOLOGY OF LATERNULA TRUNCAT. 523 (usually) 2-3 /A in diameter, but sometimes as large as 5 /x. The crypt cells (CC) possess flagella (FL) 25 /x long. Small pyramid shaped darkly staining cells (DA) in the crypts resemble those thought by Owen (1970) to be secretory in Cardinal. Similar cells have been observed in Halicardia by Nakazima (1927). Another condition encountered in L. tmncata was of breakdown (Fig. 11B) both of the digestive cells, to produce large fragmentation spherules (FS), and of the flagellated crypt cells. The small darkly-staining cells in the crypts (DA) alone remained apparently intact. Allen (1958) noted the characteristic large distended 5mm CA1. CA2 1A N FIGURE 12. Latcrnula tmncata, a transverse section through the kidney in the region of the rectum. Abbreviations are: DK, Distal limb of the kidney; IA, Aperture in ctenidial axis; K, Kidney; MA, Mantle; N, Nerve; PK, Proximal limb of the kidney. (Other abbre- viations as in Figure 8.) digestive cells in Cochlodcsma, but did not appreciate that these cells were probably in the process of breakdown. The epithelium of the secondary duct which, as in Cochlodcsma (Allen, 1958), characteristically possesses a brush border also breaks down. During this process large numbers of spherical droplets are budded off within fragmentation spherules from the distal surfaces of the cells. Other droplets are released into the hemocoel. 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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