(Müller, 1858)
Spicules in distal half compressed, linear, two-edged, with bifid apex; in proximal half three times as broad, lanceolate, pyramidal at base, without leaf-cross. From two broader edges of proximal half, two longitudinal rows of opposite apophyses; four to six broad triangular teeth in each row. Length of spicules: 0.3 to 0.4 mm, breadth in outer half: 0.012 mm, in inner half: 0.03 to 0.04 mm.