. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. 416 FIELDIANA: GEOLOGY, VOLUME 13. Fig. 140. Americaspis americana, restoration of dorsal shield in dorsal view (about X 2). Ridge pattern shown in a generalized way, with characteristic irreg- ularities omitted; ridges actually finer than drawn. orb, orbit. The crests of the ridges are generally somewhat convex, possibly slightly flatter on the ventral shield, and higher and sharper laterally on the dorsal shield. Americaspis claypolei,1 new species. Figure 141. Type.—CNHM, PF 866, an incomplete and c
. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. 416 FIELDIANA: GEOLOGY, VOLUME 13. Fig. 140. Americaspis americana, restoration of dorsal shield in dorsal view (about X 2). Ridge pattern shown in a generalized way, with characteristic irreg- ularities omitted; ridges actually finer than drawn. orb, orbit. The crests of the ridges are generally somewhat convex, possibly slightly flatter on the ventral shield, and higher and sharper laterally on the dorsal shield. Americaspis claypolei,1 new species. Figure 141. Type.—CNHM, PF 866, an incomplete and crushed dorsal shield (fig. 141). 1 In honor of Edward W. Claypole (1835-1901) who described the first Palae- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Denison, Robert H. (Robert Howland), 1911-1985; Chicago Natural History Museum. Chicago : Chicago Natural History Museum Press
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