 published a vigorous reply to Butterfield's arguments – near the end they wrote, "Many of Butterfield’s misconceptions might well have been avoided had he taken the opportunity to examine all the new material that formed the basis of our study.…" They said they had found in body fossils of "Odontogriphus" visible traces of the membrane on which its tooth-rows were mounted; in their opinion this was clear evidence of a basic belt-like radula assembly with regularly spaced tooth-rows, a feature unique to molluscs.On the other hand, they wrote, eunicid polychaetes' jaws have only the vaguest similarity to radulae, and other annelids' jaws grow continuously without replacement; and they supported this with a point-by-point comparison of "Odontogriphus"’ feeding apparatus with that of the dorvilleid polychaetes which Butterfield claimed it resembled.