. Bulletin of the British Museum (Natural History), Geology. 262 COLONIAL PHILLIPSASTRAEIDAE FROM DEVON 50 40 (mm) 30 â 20 10. 235 3-15 395 4 75 u (04 mm class intervals) 555. 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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