The below images have been adapted (inverted) from the black on white images of Dr. Eduard d’Alton found in Die vergleichende Osteologie.

Bat Skeleton by Eduard Joseph D’Alton circa 1824 Adapted from Die vergleichende Osteologie

Beaver Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie

Camel Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie

Civet Skeleton by Eduard Joseph D’Alton circa 1822 Adapted from Die vergleichende Osteologie

Elephant Skeleton by Eduard Joseph D’Alton circa 1821 Adapted from Die vergleichende Osteologie

Giraffe Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie

Harbor Seal Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie

Hare Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie

Hippototamus Skeleton by Eduard Joseph D’Alton circa 1823 Adapted from Die vergleichende Osteologie