. Bulletin of the American Museum of Natural History. Natural history; Science. Fig. 9. Dorsal, lateral, and ventral views of head of Scaphiopvs albopunctatus Peters, (12147, X 1). Modifications for burrowing are seen in the spade-like rostral and the valve-like closure of the jaws. The development of the rostral for burrowing reaches an extreme in this species. The lower jaw closes with a valve-like precision, and the mental has a projection, with a horn-like tip, which fits into a correspond- ing emargination of the rostral. The upper labials are reverted and project well below the labial bo
. Bulletin of the American Museum of Natural History. Natural history; Science. Fig. 9. Dorsal, lateral, and ventral views of head of Scaphiopvs albopunctatus Peters, (12147, X 1). Modifications for burrowing are seen in the spade-like rostral and the valve-like closure of the jaws. The development of the rostral for burrowing reaches an extreme in this species. The lower jaw closes with a valve-like precision, and the mental has a projection, with a horn-like tip, which fits into a correspond- ing emargination of the rostral. The upper labials are reverted and project well below the labial border. The largest male measures 984 mm., the largest female 1367 mm. (an exceptional size). The tail length in three males ranges from .18-. 19 of the total, in three females from .14-. 16 of the total. The sexes are very distinct in number of ventral plates, 185-189 in males, 216-224 in females, both figures rather low in comparison with the range 212-240 given by Boulenger (1894, p. 254). The subcaudals in males are 64-69, in females 58-66. The dorsal scale count ranges from 23-21-17 to 25-23- 19. The scales about the e}'e, exclusive of the supraocular, are somewhat. 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 Allen, J. A. (Joel Asaph), 1838-1921; American Museum of Natural History. New York : [American Museum of Natural History]
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