| Class | Order | Family | Genus | Species | Authority | Common Name | Sources (full citations given below this table) |
| Anopla | Paleonemertea | Tubulanidae | Tubulanus | pellucidus | (Coe) | ? | DMC |
| Anopla | Heteronemertea | Lineidae | Cerebratulus | lacteus | (Leidy) | milky ribbon-worm | DMC; Pollock (1998); Procter (1933, p. 130.) |
| Anopla | Heteronemertea | Lineidae | Lineus | arenicola | ? | sandy lineus | Pollock (1998) |
| Anopla | Heteronemertea | Lineidae | Lineus | ruber | (O. F. Müller) | ? | DMC; Pollock (1998); Procter (1933, p. 130.) |
| Anopla | Heteronemertea | Lineidae | Lineus | socialis | (Leidy) | ? | Pollock (1998); Procter (1933, p. 130.) |
| Anopla | Heteronemertea | Lineidae | Micrura | affinis | ? | bright red ribbon-worm | Pollock (1998) |
| Anopla | Heteronemertea | Lineidae | Micrura | albida | ? | ? | DMC |
| Anopla | Heteronemertea | ? | Myoisophagos | sanguineus | (Rathke) | ? | Pollock (1998, as Lineus sanguineus |
| Anopla | Paleonemertea | Cephalothricidae | Cephalothrix | linearis | (J. Rathke) | DMC | |
| Anopla | Paleonemertea | Cephalothricidae | Procephalothrix | spiralis | Coe | thread ribbon-worm | Pollock (1998); Procter (1933, p. 130. [see note 1 below]) |
| Enopla | Bdellonemertea | Malacobdellidae | Malacobdella | grossa | ? | leech ribbon-worm | Pollock (1998) |
| Enopla | Hoplonemertea | Amphiporidae | Amphiporus | angulatus | (O. F. Müller) | chevron amphiporus | DMC; Pollock (1998); Procter (1933, p. 129.) |
| Enopla | Hoplonemertea | Amphiporidae | Zygonemertes | virescens | ? | green ribbon-worm | Pollock (1998) |
| Enopla | Hoplonemertea | Carcinonemertidae | Carcinonemertes | carcinophila | ? | crab nemertean | Pollock (1998) |
| Enopla | Hoplonemertea | Prosorhochmidae | Oerstedia | dorsalis | ? | ? | Pollock (1998) |
| Enopla | Hoplonemertea | Tetrastemmatidae | Tetrastemma | candidum | (O. F. Müller) | green four-eyed ribbon-worm | DMC; Pollock (1998); Procter (1933, p. 129.) |
| Enopla | Hoplonemertea | Tetrastemmatidae | Cyanophthalma | cordiceps | ? | striped four-eyed ribbon-worm | Pollock (1998) |