Complex sentence: The 5 to 5½ whorls are separated by profound sutures, They are whitish, conspicuously ornamented with flexuous rosy-brownish lines and remote spots at the suture and periphery.
Split into simpler sentences: The 5 to 5½ whorls are separated by profound sutures. The shells are whitish, conspicuously ornamented with flexuous rosy-brownish lines, and remote spots at the suture and periphery.