. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 580 Bulletin American Museum of Natural History [Vol. XLVIII. Fig. 11. Ursus kokeni. No. 18384, type. Natural size. Lower jaw, outer and top views. Ursus kokeni, new species Type.—No. 18384, a lower jaw with and adjacent alveoli. Distinctive Characters.—Jaw very short and deep as in the
. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 580 Bulletin American Museum of Natural History [Vol. XLVIII. Fig. 11. Ursus kokeni. No. 18384, type. Natural size. Lower jaw, outer and top views. Ursus kokeni, new species Type.—No. 18384, a lower jaw with and adjacent alveoli. Distinctive Characters.—Jaw very short and deep as in the sun-bear U. malayanus, but size large, comparable with U. arctos; mi narrow and long, lacking the metastyUd cusp of LK malayanus; m2 rather short and wide, wider posteriorly than anteriorly. It is very likely that the molar figured by Koken as U. aff. japonicus is of this species. Arctonsrx rostratus, new species Type.—No. 18393, skull lacking the zygomatic arches and with damaged teeth. Paratypes.—Nos. 18394, skull, and 18382, 18383, lower jaws. Distinctive Characters.—Length of skull, premaxUlse to condyles, 148 mm.; sagittal crest narrow, distinct; py absent, pf larger than in A. collaris and more clearly two-rooted, the diastema behind p'^ greater than length of p'; p* larger with inner cusp better developed and more antero-internal; m' larger, broader and more quadrate in form; auditory meatus and posttympanic process broad, massive and. 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 Central Asiatic Expeditions (1921-1930); Andrews, Roy Chapman, 1884-1960; Matthew, William Diller, 1871-1930. [New York : American Museum of Natural History
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