A. M. armigera (microphthalma?), copulation organ, Tvaerminne. B-I and L,N,O. M. kupelwieseri B Ekenaes, Dagmarkaellan, C Tvaerminne, 'Haesthagsdiket', D Tvaerminne, Langskaer, pond by a brook, E Kittilae, Sirkka, cold spring, F as in B, G (M. schmidtii) Helsingfors, Haga, small wood ditch, H tvaerminne, Braennskaer, pond, I Tvaerminne Kohagen (total length of the cuticular apparatus 135 micrometers) u) K (M. schmidtii) Tvaerminns, Haesthagen. L as in D. M M. microphtalma?, Tvaerminne, small ditch with flowing water 'Haesthagsdiket'. N. M. kupelwieseri Bursa copulatrix, found at same place as D, O egg from the same example as M.
A. Free-crawling animal, B. Copulatory organ on a squeezed animal, C. Bursal piece on a squeezed animal, D. Caudal ends of live animals, E. Reconstruction of the genital organs as seen from below, from horizontal sections, F. Cirrus in sagital section, G. Copulatory organ, uterus and bursa from a horizontal section. A, B und D free-hand drawings, all other figures with camera lucida: C 650 x, E 500 x, F and G 950 X.