. Bulletin of the American Museum of Natural History. Natural history; Science. Fig. 13. Dorsal and lateral views of head of Miodon unicolor, new species, (12454, type, X 2). Miodon collaris (Peters) Microsotna collare Peters, 1887, Sitzber. Ges. Naturf. Freunde, Berlin, p. 148. Miodon collaris Boulenger, 1896, 'Cat. Snakes,' III, p. 251. Mocquard, 1897, Bull. Soc. Philom. Paris, (8) X, p. 13. Boulenger, 1900, Proc. Zool. Soc. London, p. 454. Gough, 1903, Zool. Jahrb. (Syst.), XVII, p. 468.' Boulenger. 1905, Ann. Mag. Nat. Hist., (7) XVI, p. 114. Ferreira, 1906, Jorn. Sci. Lisboa, (2) VII, p.
. Bulletin of the American Museum of Natural History. Natural history; Science. Fig. 13. Dorsal and lateral views of head of Miodon unicolor, new species, (12454, type, X 2). Miodon collaris (Peters) Microsotna collare Peters, 1887, Sitzber. Ges. Naturf. Freunde, Berlin, p. 148. Miodon collaris Boulenger, 1896, 'Cat. Snakes,' III, p. 251. Mocquard, 1897, Bull. Soc. Philom. Paris, (8) X, p. 13. Boulenger, 1900, Proc. Zool. Soc. London, p. 454. Gough, 1903, Zool. Jahrb. (Syst.), XVII, p. 468.' Boulenger. 1905, Ann. Mag. Nat. Hist., (7) XVI, p. 114. Ferreira, 1906, Jorn. Sci. Lisboa, (2) VII, p. 169. Boulenger, 1915, Proc. Zool. Soc. London, p. 215; 1920, p. 291. • Six specimens are referred to this species: A. M. N. H. No. 12445 (August 1910), 12451-52 (April 1914), Medje; 12446-46 (November 1913), Niapu. These specimens correspond in coloration and scale characters with Miodon collaris in every respect with the exception of a higher range of ventral plates. The dentition resembles that of Cy7iodontophis Werner (1902, Verb. Ges. Wien, LII, p. 345), but the writer has re- tained Miodon (as currently used) pending a revision of this difficult group. Miiller (1910, Abh.'Bayer. Akad. Wiss., 2 Kl., XXIV, p. 611) has referred Cynodontophis setnulans to Miodon notatus, but retains the new genus which has also been recognized by Boulenger (1915, p. 215). The specimens agree in having one pre- and two postoculars; seven labials above and ])elow, of which the third and fourth upper labials enter the eye; and temporals 1-1, subequal. The coloration is strikingly like that of Miodon collaris figured by Bocage (1895, 'Herpetol. Angola,' PI. xv, fig. 1). The dorsal scales are a dark grayish l^rown, slightly reddish on the sides, and the ventrals have. 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
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