. Devonian fishes of Iowa. Fishes, Fossil; Paleontology; Paleontology. DEVONIAN FISHES OF IOWA 93 Bothriolepis minor Newberry. (Text-figure 15) 1889. Bothriolepis minor J. S. Newberry, Monogr. IT. S. Geol. Surv. 16, p. 112, pi. 20, figs. 6-8. 1892. Bothriolepis minor E. D. Cope, Proc. Amer. Phil. Soc. 30, 224. 1899. Bothriolepis minor C. R. Eastman, 17th Ann. Rept. N. Y. State Geol. p. 324, text-fig. 5. 1907. Bothriolepis minor Leidy, C. R. Eastman, Mem. N. Y. State Mus. 10, p. 52, text-fig. 13. This species is readily distinguished from the preceding by its smaller size and very much fine
. Devonian fishes of Iowa. Fishes, Fossil; Paleontology; Paleontology. DEVONIAN FISHES OF IOWA 93 Bothriolepis minor Newberry. (Text-figure 15) 1889. Bothriolepis minor J. S. Newberry, Monogr. IT. S. Geol. Surv. 16, p. 112, pi. 20, figs. 6-8. 1892. Bothriolepis minor E. D. Cope, Proc. Amer. Phil. Soc. 30, 224. 1899. Bothriolepis minor C. R. Eastman, 17th Ann. Rept. N. Y. State Geol. p. 324, text-fig. 5. 1907. Bothriolepis minor Leidy, C. R. Eastman, Mem. N. Y. State Mus. 10, p. 52, text-fig. 13. This species is readily distinguished from the preceding by its smaller size and very much finer ornamentation, the external surface being covered with fine, closely crowded vermiculating ridges. Unfortunately, it is known only by detached plates, among which the headshield and pectoral limbs are excessively rare. The latter are of about the same proportions as in B. nitida. Concerning the headshield it is stated by Cope that "one of the characters of the species is seen in the fact that the sensory grooves of the median occipital plate do not extend to the smooth articular border, but are separated from it by a band of sculp- ture. The premedian plate is crossed by a groove which pre- sents an abrupt loop backwards at the middle.'' As is commonly the case with this class of remains, the antero- dorso-median plate is of much more frequent occurrence than any other, though seldom found entire. Its orientation may be easily determined by means of the V-shaped sensory canals which diverge from about the center of the plate, or, in case the. Fig. 15 Fig. 15. Bothriolepis minor Newb. Antero-dorso-median with denuded,^'superficial ornament. Catskill, Delaware county, New York. 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 Eastman, Charles Rochester, 1868-1918; Iowa Geological Survey. Des Moine
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