. Bulletin of the British Museum (Natural History). FiG. 6. Radial section of Eucrassatella gibbosa. CL = crossed-lamellar, H = homogeneous, PM = pallial Fig. 7. Radial section of Astarte borealis. CL = crossed-lamellar, PM = pallial myo-stracum, MP = myostracal 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