The Digital Morphology library from the University of Texas-Austin is "a dynamic archive of information on digital morphology and high-resolution x-ray computed tomography of biological specimens." The library offers fascinating 2D and 3D visualizations of vertebrate internal and external structures -- as well as a growing number of invertebrates -- representing over 100 specimens from university...

The Florida Museum of Natural History offers a number of Web-accessible databases, including this group of databases for the museum's zooarchaeology collection. The physical collection contains "skeletons of vertebrates and exoskeletons of mollusks and crustaceans and their associated data." Information is accessible through individual databases for birds, bivalves, crustaceans, fishes,...