. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TWO NEW DINOFLAGELLATES 197 forced out of the theca through the cingular region. The hypochlorite treatment was then applied to the empty Fragilidium theca, especially in studies of the sulcus and cingulum. Diagnosis. Small-sized, conical epitheca, rounded hypotheca, without horns. Cingulum wide, cavazone, descendent, with displacement equal to two-thirds of its width, without lists. The cingulum has six plates, five equal, preceded at the left by a transitional one. Sulcus deep, of medium width, slightly curved to the right
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TWO NEW DINOFLAGELLATES 197 forced out of the theca through the cingular region. The hypochlorite treatment was then applied to the empty Fragilidium theca, especially in studies of the sulcus and cingulum. Diagnosis. Small-sized, conical epitheca, rounded hypotheca, without horns. Cingulum wide, cavazone, descendent, with displacement equal to two-thirds of its width, without lists. The cingulum has six plates, five equal, preceded at the left by a transitional one. Sulcus deep, of medium width, slightly curved to the right. a. FIGURE 2. Scrippsiella siveeneyi, atypical plate patterns, a and b) Two epithecae, apical view, c) Antapical view of a hypotheca. All figures about X 1500. The sulcus has four plates, with the posterior plate largest. The pattern of the major body plates is the same as that of an Orthoperidinium with three inter- calaries. Cell length, 24— ^; transdiameter, 19-24 /t, chromoplasts numerous, elliptical, generally brown-yellow. La Jolla, California. Description. This organism resembles Peridinium trochoideum in its general shape and size, and to some degree in its plate formula: 4', 3a, 7", 6c, 5" ', 2" ", and 4s. Its epitheca is high and conical, most individuals deviating from a. 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
