Francis Calley Gray

Moritz Steinla, 19th century

Moritz Steinla, 19th century

Moritz Steinla, 19th century

A. Krausse, 19th century

Ephraim Gottlieb Krüger, 18th-19th century

Joseph Caspar, 19th century

Johann Friedrich Wilhelm Müller, 18th-19th century

Johann Gabriel Friedrich Poppel, 19th century

Johann Martin Friedrich Geissler, 19th century

Johann Friedrich Wilhelm Müller, 19th century

Samuel Amsler, 19th century

Ferdinand Ruscheweyh, 1827