One hundred eighty-five species of benthic Foraminifera were identified in a study of sediment substrates and tubeworm surfaces in (a) Green Canyon, Garden Banks, and Mississippi Canyon (245-1081 m) and (b) Alaminos, Farnella, and De Soto Canyons (1848-2918 m); the samples were obtained from submersibles in both seep and non-seep (control) areas. One hundred twentytwo species were calcareous, 63 agglutinated. An atlas with illustrations of most species is included in this report.