Reproductive cells, [27], [28], [111].

Rhodites rosae, parthenogenesis of, [325].

Richter, on inheritance of acquired characters, [438].

Robin, on pole-cells of Diptera, [197].

Rolph, on conjugation, [286].

Romanes, on correlation, [389].

Roth, on heredity, [166], [169].

Rotifera, unequal length of life in two sexes of, [58];

polar bodies of, [350].

Roule, on origin of ova, [222].