Relatively stout body, with trunk tapering strongly toward the head. Long snout, relatively narrow and bell-shaped (preoral snout about 9 to 11% of total body length). Gill slits moderately large but smaller than eye diameter. Fairly broad nostrils (incurrent and excurrent apertures very large and circular). First dorsal fin slightly smaller than second one. Origin of first dorsal fin over or slightly anterior to pelvic fin midbases. Insertion of second dorsal fin opposite anal fin insertion. Pectoral fins small. Pelvic fins high and broadly rounded. Anal fin short, high and angular (about three times as long as high).
Grey to blackish. Young have white tips on pectoral and dorsal fins that may be present in some adults.
Western North Atlantic: Off Massachusetts. Eastern North Atlantic: Porcupine Bank (west of Ireland).
A little-known, possibly bottom dwelling shark found over the continental slope from 650 down to 1750 m.