Waren a (85 résultats)

Couverture rigide. Etat : Bonne Condition. Couverture légèrement usée. Intérieur propre. Envoi soigné.

Couverture rigide. Etat : Bonne Condition. Couverture légèrement usée. Intérieur propre. Envoi soigné.

SOFTCOVER. Kl.-8°. Originalbroschur. 12 Seiten. Innenrand mit kurzem Einriss. Noch gut erhalten. Das Columbushaus gab es von 1932 - 1957. --- Währung: Reichsmark (RM). -- Bitte Portokosten außerhalb EU erfragen! / Please ask for postage costs outside EU! / S ' il vous plait demander des frais de port en dehors de l ' UE! // Bitte beachten Sie auch unsere Fotos! / Please also note our photos! / Veuillez noter nos photos -- Genießen Sie den goldenen Herbst! Machen Sie es sich gemütlich , bei uns finden Sie sicher die passende Lektüre! -- Wir kaufen Ihre werthaltigen Bücher! K19606-232514.…

Stiff Wrappers. Etat : Very Good. 8 b.w. plates, pp.60. Size: Sm 4to.

Soft cover. Etat : Near Fine. 1st Edition, Limited Edition. Signed by James Willert on the half-title page. Limited first edition - number 34 of an unspecified number of copies of this limited edition. Oblong quarto in blue paper wraps. B&W illustrations & maps. Condition: slight sun-fading to spine & edges of wraps; else near fine. Pages: xiv, 267.…

Radulae have been examined of juvenile specimens of 18 species belonging to the Turbinidae, the Tricoliidae. and 6 subfamilies of Trochidae. The investigations show that all species pass through profound changes, usually finishing at a size of 1.53 teleoconch whorls. Most species have an identical, shared morphology at a size of up to 1.52 teleoconch whorls, except the species of Calliostomatinac and Solariellinae. The evolutionary consequences are discussed and it is suggested that such an unspecialized starting point means a high potential for specializations and future evolution. For the taxonomist this means a reduction in the reliability of radular differences as a systematic tool. 9 pp., 6 figs, 4. …

3 pp., 8 figs, 4.

8 pp., 35 figs, gr. 8.

8 pp., 35 figs, gr. 8.

8 pp., 48 figs, gr. 8.

For the first time it has become possible to study a `living fossil' Laevipilina antarctica, a representative of the family Neopilinidae (Mollusca, Monoplacophora) by means of transmission electron microscopy. This led to the discovery of a bacterial symbiosis in the epidermis of the mantle roof and of the head of the animal. Bacteria with varying morphologies were found between the microvilli of the epidermal cells. In addition, modified and specialized epidermal cells (bacteriocytes) were detected in the mantle roof and the post-oral tentacles. In contrast, the sole of the foot and the alimentary tract of the animal are free of symbionts. The bacterial symbionts may be involved in the recycling of dissolved organic matter. 5 pp., 10 figs, 4.…

7 pp., 27 figs, gr. 8.

10 pp. + 4 pls, gr. 8.

New taxa: Discalis n. gen., Discalis canariensis n. sp. 3 pp., 3 figs, 4.

18 pp., geh. gr. 8.

UFA-Porträtpostkarte, eigenhändig signiert (verschiedene Motive vorhanden; Abbildung zeigt Muster).

18 pp., 15 figs, 4.