. Bulletin of the British Museum (Natural History), Geology. 298 DINOFLAGELLATE CYSTS AND ACRITARCHS laevorotatory ; sulcus broad and short, mainly extending on the hypotract. Shell wall transparent and surface smooth. Precingular archaeopyle present, formed by loss of plate 3". Holotype. BM(NH) slide ¥.53620(2). Kimmeridge Clay from 100 ft. above the second dolerite sill, east of Digg, Staffin Bay, Skye (SS 627). Dimensions. Holotype : shell diameter 30 x 30 ju. ; height of the crests 4-8 /x ; breadth of the cingulum 5-6 p. Dimensions of the second specimen : shell diameter 28 x 28 /j. ;
. Bulletin of the British Museum (Natural History), Geology. 298 DINOFLAGELLATE CYSTS AND ACRITARCHS laevorotatory ; sulcus broad and short, mainly extending on the hypotract. Shell wall transparent and surface smooth. Precingular archaeopyle present, formed by loss of plate 3". Holotype. BM(NH) slide ¥.53620(2). Kimmeridge Clay from 100 ft. above the second dolerite sill, east of Digg, Staffin Bay, Skye (SS 627). Dimensions. Holotype : shell diameter 30 x 30 ju. ; height of the crests 4-8 /x ; breadth of the cingulum 5-6 p. Dimensions of the second specimen : shell diameter 28 x 28 /j. ; height of the crests 6-8 ft ; breadth of the cingulum 5-6 p. Description. A small proximochorate cyst, characterized by the high crests rising from the plate boundaries. Neither an apical horn nor any appendages are developed. Four apical and six precingular plates form the epitract. Plate 1' is elongate ; the other three apical plates are polygonal in shape. Plate 3' is larger than plates. 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 British Museum (Natural History). London : BM(NH)
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