Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 PHOTOPHORES OF DECAPOD CRUSTACEA 317 Dorsal to the above cells, which may be referred to as lens cells, occurs a zone, seven or eight cells in depth, possessing a pronouncedly different structure. The cells com- posing it (Fig. 3 and Plate XXIV, fig. 4, ) are columnar, of almost uniform size, and are regularly arranged. Each cell is highly vacuolated, its cytoplasm being distributed in a uniform and well-defined layer around the sides and basal end of the cell, while at the distal end (that nearest the lumen o
Discovery reports (1941) Discovery reports discoveryreports20inst Year: 1941 PHOTOPHORES OF DECAPOD CRUSTACEA 317 Dorsal to the above cells, which may be referred to as lens cells, occurs a zone, seven or eight cells in depth, possessing a pronouncedly different structure. The cells com- posing it (Fig. 3 and Plate XXIV, fig. 4, ) are columnar, of almost uniform size, and are regularly arranged. Each cell is highly vacuolated, its cytoplasm being distributed in a uniform and well-defined layer around the sides and basal end of the cell, while at the distal end (that nearest the lumen of the tubule) it forms a deeper zone, which is in turn lOOp refr. ere. vac c. ercLjt Fie Oblique transverse section through one of the tubules of the antero-lateral portion of the liver of sLstes corniadum, enlarged from the section seen m Fig. 2. erupting cell of tubule; eioipted cytoplasm lying within the lumen of the tubule; 'lens' cell; refractile rods; vacuolated cell. vacuolated and presents a frothy appearance. This vacuolated distal tip is best developed in the more ventral cells of this zone and progressively disappears in passing to the more dorsal cells, which possess only a uniform distal mass of cytoplasm thicker than that around the remainder of the periphery of the cell. As a result of this arrangement of the cytoplasmic portion of the cell, the greater part of the cell body is occupied by a large vacuole, within which float scattered masses of cytoplasm having apparently the same 2-2
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