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