1931 Four papers in one. 74 p., 11 text figures, 1 plate, paperbound (original printed covers). The first paper is by Schmitz, the second by Collin, the third by Richards, the fourth by Cresson. All contain descriptionsof new species. Very good.
1929-1934 489 p., num. figs, 8 pls, paperbound (in issues). Library stamp.