INTRODUCTION During an investigation of the causes of pigment lack in cave Crustacea, it seemed desirable to study the kind of pigmentation in related above-ground (epigean) forms. The colour of three species of Isopoda was found to be due to a melanin-like pigment in branched cells (Baldwin & Beatty, 1941). Two plant carotenoid pigments— cryptoxanthine and /J-carotene—were present throughout t...

A new gammarid Dursogammarus dromaderus gen. et sp. nov. (Amphipoda: Gammaridae) is described from coastal Black Sea habitats of the southwestern foothills Russian Caucasus, being an obligate dweller pebbles. The species morphologically resembles representatives Echinogammarus Stebbing, 1899 and Dikerogammarus 1899, somewhat Gmelina G. O. Sars, 1894, but can be easily separated by a unique comb...