Zoology Kükenthal, Willy Pennatulacea (sea feathers, flowering animals). Scientific results of the German deep-sea expedition on the steamer "Valdivia" 1898-1899, ed. by C. Chun, vol. 13, 2nd issue. With (lithogr.) XIII-XXIX (5 coloured lithographs) plates, 17 maps and 295 text illustrations. Jena, Fischer, 1911. VI, pp. 114 - 576 pages. Gr.-4°. Original half cloth (slightly stained and somewhat rubbed). First edition, rare. Not in Nissen. - Cf. Henze III, p. 94 - Special, extensive treatise on the Pennatulacea (sea pens), which are flowering animals that colonise the sand and mud bottoms in all the world's oceans. They usually live at greater depths, only in the tropics also in shallow water. - Single volume of the results of the Valdivia expedition, the first large-scale German expedition to explore the deep sea under the leadership of Car Chun. - At the end, the title pages and the inside notes of vols. 5 and 15 are bound in. - Including: Kükenthal, W., Gorgonaria (fan corals or polyps in colonies). 2nd half: general part. With 41 plates and 21 text illustrations. Jena, Fischer, 1919. 4°. VI, pp. 648-946 pages. Half cloth with cover title (somewhat stained and rubbed, inner fold slightly broken). Scientific results of the German deep-sea expedition on the steamer "Valdivia" 1898-1899, ed. by C. Chun, 13th vol. 2nd part. - Rare work on sea fans. - Not published by Nissen. Zoology. - 2 rare works in 2 volumes: 1. Pennatulacea (sea feathers, flowering animals). With (lithogr.) XIII-XXIX (5 colour.lith.) plates, 17 maps and 295 text illustrations. - 2. gorgonaria (fan corals and polyps in colonies). 2nd half: general part. With 41 plates and 21 text illustrations. - Wissenschaftliche Ergebnisse der Dt. Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898-1899, ed. by C. Chun, 13th vol. 2nd issue and 13th vol. 2nd part. Jena, 1911 and 1919. 4°. Original half cloth covers (somewhat stained and rubbed). This lot is taxed. There is a 24.95% surcharge on the hammer price and 7% (books, art) or 19% VAT (manuscripts, silkscreens, offset prints, photographs) on the final invoice amount in the European Union. This work is subject to the regular margin scheme. There is a 24.95% buyer's premium on the hammer price and 7% (Books and Art) or 19% VAT (Manuscripts, Screenprints, Offsetprints and Photographs) on the final invoice amount in the European Union.