. Dansk ornithologisk forenings tidsskrift. Birds; Birds. 25 Paa ganske lignende Maade foregaar Udviklingen hos Kryb- dyrene. Der opstaar ogsaa her ved Kimplettens Midte og lige- ledes i det ydre Kimblad en Fortykkelse, fra hvis bagerste Rand ses et lille Fremspring, der kaldes Primitivstriben eller Primitiv-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dansk ornithologisk forening. [København] : Den Forening

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1907