stylet tip opening oblique

The stilette is curved and obliquely truncated on its convex side. This conical tube is bent at a right angle near its proximal end. p. 27

The penis-stilette in this Macrostomum is almost straight and is terminally curved in weakly pressed specimens. There are two flanges in the curved termination, the one on the convexity of the curve being longer than the one on the concavity of the curve. Thus, it appears, that this stilette, in which four lateroterminal borders may be seen, is cut in bias. p. 193/194

The stylet reaches its termination in a long sharpened point. p. 188 The sperm cells are elongate, undulating bodies which lack the postero-Iateral setae so common to the genus and are possessed of chromatin granules in the anterior part of the cell having the largest caliber. p. 189

The singular sperm cells are particularly well described as lengthened fine threads which have an undulating feeler at one end. The major portion of the cell is spindle-shaped and contains a non-spherical nucleus enmeshed in an hyaline cytoplasm. Axial and spirally arranged filaments are present In the cell. p. 280

The penis-stilette is a funnel with almost a straight main axis and a sharply pointed and bent termination. The terminal portion enclosing the external opening is bent at an angle of 115 degree. The basal proximal rim is unevenly crenated. The sperm cells have a feeler, body region and a thin filamentous tail. Setae are not present. There is a noticeable massing of chromatic granules in the body region of the cell. p. 31