A review of the land mollusks of the Belgian Congo : chiefly based on the collections of the American Museum Congo Expedition, 1909-1915 / by Henry A. Pilsbry ; ecological notes by the collectors Herbert Lang and J. Bequaert
The sessile barnacles (Cirripedia) contained in the collections of the U. S. National museum; including a monograph of the American species, by Henry A. Pilsbry