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Autotypie und Netzhautbild — Fritz Kahn

Ceratogyrus Spiders — Plate I

Farmer Looking Toward the Sky

Fossil Bone Studies — Plate XVIII

Japanese Flying Gurnards — Plate II

Lystrosaurus Skull — Plate IV

Mantellia Baroni and Magalixalus Madagascariensis — Plate X

Narudasia Festiva and Phrynomantis Nasuta — Plate XIV 2. Alternative titles

October — Chicago Calendar, 1903

Pelmatorycter Spiders — Text Fig. 6a

Philippine Dracos — Flying Lizard Scientific Plate, 1922

Philippine Geckos — Scientific Zoological Plate, 1922

Physarum Pulcherrimum & Physarum Citrinum

Ptychozoon Intermedia — Philippine Flying Gecko, 1922

Rhacophorus Aglavei — Plate IX

Sonnenbad! — The Effects of Sunlight on the Body

The Ships Are Coming — James H. Daugherty, 1917

Unstalked Crinoid in Red — Siboga Expedition

Unstalked Crinoid — Siboga Expedition

Unstalked Crinoids — Siboga Expedition Plate XXIV

Unstalked Crinoids — Siboga Expedition Plate XXVII

Varanus Monitor Lizards — Comparative Scale Study, 1922