. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 6o Bulletin So. Calif. Academy Sciences J Vol 64, Pt. 2, ip6^. Figure 2. Halianassa (?) allisoni, new species, UCMP 47250, Ysidro Formation, La Purisima, Baja California, Mexico. Right mandible, medial view. nulid area partially concealed from lateral view by anterior margin of ascending ramus; margin of coronoid crest rather thick, rounded and flanged laterally. Mandible. The horizontal ramus resembles Dugong with respect to size and shape but is more stoutly constructed. The ventral mar- gin
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. 6o Bulletin So. Calif. Academy Sciences J Vol 64, Pt. 2, ip6^. Figure 2. Halianassa (?) allisoni, new species, UCMP 47250, Ysidro Formation, La Purisima, Baja California, Mexico. Right mandible, medial view. nulid area partially concealed from lateral view by anterior margin of ascending ramus; margin of coronoid crest rather thick, rounded and flanged laterally. Mandible. The horizontal ramus resembles Dugong with respect to size and shape but is more stoutly constructed. The ventral mar- gin is not well preserved but the curvature of laminated bone in this region suggests a broader ventral arch in the horizontal ramus than in Dugong. The anterior lateral surface is curved outward less strongly than Dugong but the posterior curvature of the symphysis is like Dugong and the manatee Trichechus. The do^^^lward deflec- tion of the symphysis is comparable to Dugong. The medial and lateral surfaces below NL alveolus are slightly concave and convex, respectively. A large, shallow depression, broken off ventrally, is present on the posterior lateral surface of the horizontal ramus ex-. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
Size: 1769px × 1413px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, books, booksubjectnaturalhistory
