Plate V of "A Descriptive Catalog of the Monstrosities in the Cabinet of the Boston Society for Medical Improvement". Figure 16: skeleton of an acephalus fetus; A) the frontal and B) the parietal bones; C) the posterior portion of the occiput. Figure 17: fusion, with irregular development of three of the ribs, from the previous specimen. Figure 9: A front view of the upper portion of the spine, showing an extensive fissure through the bodies of the vertebrae; A) the central opening; B) union of the body of the third cervical vertebra with that of the seventh dorsal, upon the left side; C) union of the bodies of the second, third, fourth, and fifth cervical vertebrae with the eighth dorsal on the right side.