Rogerella cragini Schlaudt et Young, 1960

Diagnosis: Aperture of burrow 0.8-1.9 and 0.3-0.7 mm in length and width, subelUptical, virgulate (comma shaped), sometimes hooked to the right, more often hooked to the left as viewed, with a peduncular slot or groove, joined to a widening opening at an angle varying with the location on the host shell; apertural flange rarelypresent; burrow slightly less than one-half as deep as it is long,