1926-1936 Two parts in two. 332 p, paperbound (original uniform printed covers). These are parts 33 and 71 of the series, and containing separate title pages, and in part II a combined title page an index for both. It is unclear why Hans Burgeff (1883-1976) abandonned the project. Stamped on the front wrappers is the text "Verlag Gustav Feller". It is unclear if Feller took over Junk stock, or simply is a redistributor. Uncut. Back wrapper of part 71 missing (blank wrapper, no loss of information), otherwise a good clean set.
1967-1975 All reprints in printed wrappers. All from 1967-1975 except one reprint from 1906. Hans Burgeff (1883-1976) had a long career in biology (botany and entomology).
1956 59 p., 6 (2 col.) pls, paperbound (original printed covers). Unopened copy. Publishd in: Nova Acta Leopoldina.
1932 viii, 249 p., 176 figs, publisher's hcloth.
1950 66 p., 6 figs, 21 maps, paperbound (original printed covers). Publishd in: Portugaliae Acta Biologica.