ON SOME GAMMARIDEAN AMPHIPODS FROM WESTERN BALKAN PENINSULA (CONTRIBUTION TO THE KNOWLEDGE OF THE AMPHIPODA 275)

One new species of the family Niphargidae (Amphipoda, Gammaridea), Niphargus navotinus, sp. n. from Navotinska pećina Cave near Berane, Montenegro, is described and its relation to other members of this genus is discussed. New localities of the species Niphargus jurinaci S. Karaman, 1950 from Croatia, Typhlogammarus mrazeki (Schäferna, 1906) (fam. Typhlogammaridae) from Croatia, Herzegovina and Montenegro, Orchestia stephenseni Cecchini, 1928 (fam. Talitridae) and Synurella ambulans (F. Müller, 1846) (fam. Crangonyctidae) from Croatia are presented.