eyes normal
Macrostomum stylopencillum Fig 6.jpg
The eyes are small, reniform organs with distinct lens. There is a fine lamella at the bend of the stilette. The end of the stilette is obliquely truncated, backwardly directed toward the base of the penis. p. 121/122
Macrostomum virginianum Fig 18-24.jpg
The penis-stilette is unusually small for an animal of this size. It measures 35micro in length. Morphologically, the stilette is a simple, curved, funnel-like tube with a sub-terminal opening which is subtended by the pointed end. The sperm-cell is spindle-shaped. Two setae are present and there is a very large undulating 'Mittelrippe' on the mid-line of the surface of the cell extending from feeler to 'tail'. Chromatin material is not visible in this sperm-cell. p. 132/133
Axia gieysztori Fig 22-24.jpg
Pigment granules of the eyes quite small and not of uniform size. Penis stilette a sharply terminated conical tube, base crenated. External opening terminal with outlet on left side, point of stilette is slightly recurved. p. 426
Archimacrostomum beaufortense Fig 7.jpg
Macrostomum orthostylum Fig 1-6.jpg
Macrostomum hystricinum Fig 3b.jpg
Promacrostomum gieysztori Fig 3c.jpg
Macrostomum catarractae Fig 1.jpg
Dans la partie recourbée du stylet, on distingue les deux cloisons de celui-ci. L'une d'elles, celle du côté convexe, est plus Iongue que la cloison du côté concave. Cette disposition des deux cloisons, réunies entre elles, nous explique pourquoi la partie terminale du stylet semble coupée en biais. Les bords de ces deux cloisons sont nettement épaissis, de sorte qu'on voit quatre épaississements distincts dans la partie terminale du stylet. L'orifice du stylet est assez grand et de forme allongée. p. 133
Macrostomum ruebushi var schmitti Fig 1-6.jpg
Macrostomum album Fig 21.jpg
The opening lacking a distal lip or flange, terminal on the convexity of the curve. p. 30