. Fi^. 141. Fig. 142. Fi?. 143. Fig. 141. N. brachionus Ehrbg., ^ (nach Weber). Fig. 142. N. brachionus Ehrbg., (^ (nach Weber). Fig. 143. A'. clavulatus Ehrbg. (nach Hudson und G o s a e). Süßwasserfauna von Deutschland. Heft 14. 6

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