Note
Archeopneustes hystrix Agassiz collected from bathyal depths near the Bahamas carry the amphinomid polychaete Benthoscolex cubanus Hartman in the intestine. Infection levels as high as 80–100% were found in some populations, but multiple infection was uncommon. Populations from throughout the Bahamas area were found to be infested. Species (n = 23) of bathyal urchin have been examined for presence of the worm, but B. cubanus was only found in A. hystrix. The polychaete feeds by selecting foraminiferans and other fragments of organic material from among the gut contents of the sea-urchin.