CHUN, Carl (1852?1914). Aus den tiefen des weltmeeres. Jena: Gustav Fischer, 1900. 4to. Numerous chromolithographs and heliogravures with captioned tissue guards, maps (one large folding), and in text illustrations. Original pictorial cloth stamped in gilt and black, decorative endpapers (spine sunned with few tiny spots of fraying at extreme ends, title?page trimmed at upper margin, contents starting). FIRST EDITION of this 1899 account of a marine biological expedition to the Indian Ocean. ?? [TOGETHER WITH:] Die Beziehungen zwischen dem arktischen und antarktischen Plankton. Stuttgart: Erwin N?gele, 1897. 8vo. Map in color. Original printed wrappers (hinges cleanly broken).