. Bulletin of the British Museum (Natural History). CCL Fig. 28. Detail of radial section of Barnea Candida showing the alternation of prismatic and crossed-lamellar structure in the outer layer. SP = simple aragonite prisms, CL = crossed-lamellar, PM = paUial myostracum, CCL = complex Fig. 29. Detail of a radial section of Zirfaea crispata showing outer homogeneous (H), and middle crossed-lamellar layer (CL).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust

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. Bulletin of the British Museum (Natural History). CCL Fig. 28. Detail of radial section of Barnea Candida showing the alternation of prismatic and crossed-lamellar structure in the outer layer. SP = simple aragonite prisms, CL = crossed-lamellar, PM = paUial myostracum, CCL = complex Fig. 29. Detail of a radial section of Zirfaea crispata showing outer homogeneous (H), and middle crossed-lamellar layer (CL).. 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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Keywords: ., 1973, boo, bookauthorbritishmuseumnaturalhistory, bookcentury1900