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Observations on and typification of Navicula difficilis Grunow and its transfer to the genus Humidophila RL Lowe & al.(Diadesmidaceae, Bacillariophyta)
The taxonomic importance of the original drawings of published illustrations, with special reference to those of the 17th and 18th centuries relating to the flora of the Cape of Good Hope
Pristiphora Latreille, 1810 (Hymenoptera: Tenthredinidae: Nematinae)-two closely related species feeding on Lathyrus and Salix and notes on species feeding on leguminous plants