Heleopera nodosa Wailes, 1912

Diagnosis: Shell large, elongate, slightly compressed, the ratio of the transverse axes being about 3:4; apex acute, terminated by a nodular mass of large quartz grains ; aperture bordered by slightly recurved lips; plasma and pseudopodia normal.

Dimensions: Length 152-213 um; breadth 80-94 µm; thickness 60-75 µm; aperture 45-60 µm in width.

Habitat: Submerged Sphagnum. Distribution. Lakehurst, New Jersey.

Remarks: H. nodosa is distinguished from H. petricola by its greater size, its elongate form, the acute apex bearing a nodular mass of sand-grains, and its less compression ; it bears no resemblance to any other species of Heleopera.