. Bulletin of the British Museum (Natural History), Geology. 198 KIMMERIDGIAN DINOFLAGELLAXES & ACRITARCHS crests rise up. Precingular archaeopyle sometimes present and formed by loss of plate 3". Surface of the shell coarsely granular. HoLOTYPE: C. Downie's collection, Micropalaeontological Laboratory, University of Sheffield, KL ; from the Upper Kimmeridge Clay of Norfolk, England. Figured specimens: slide , Sample WB 18, Kimmeridge Clay, Geological Survey Borehole, Warlingham, Surrey, at 2560 ft depth. Middle Kimmeridgian (Wheatleyensis Zone). BM(NH) slide ¥.
. Bulletin of the British Museum (Natural History), Geology. 198 KIMMERIDGIAN DINOFLAGELLAXES & ACRITARCHS crests rise up. Precingular archaeopyle sometimes present and formed by loss of plate 3". Surface of the shell coarsely granular. HoLOTYPE: C. Downie's collection, Micropalaeontological Laboratory, University of Sheffield, KL ; from the Upper Kimmeridge Clay of Norfolk, England. Figured specimens: slide , Sample WB 18, Kimmeridge Clay, Geological Survey Borehole, Warlingham, Surrey, at 2560 ft depth. Middle Kimmeridgian (Wheatleyensis Zone). BM(NH) slide ¥.56346(2). Sample LO 353, from the Littleworth Quarry, Oxfordshire. Upper Kimmeridgian (Pallasioides Zone). Dimensions: Holotype, as quoted by Downie: overall length g2\i, breadth 58(1, horn length 36[x. Figured specimen from Warlingham Borehole: overall length 115^, breadth y^y., horn length 46[i,. Figured specimen from Littleworth: overall length I25[j., breadth 85(J., horn length 40(1. Range of the specimens from England and France: overall length 80-155^1, breadth 55-ioo[jl, horn length 25-60^1. Measured specimens 34 in 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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