. Bulletin of the Department of Geology. Geology. Vol. 6] Mcrriam: Virgin Valley and Thousand Greek 249 URSIDAE( ?) URSUS(?), sp. A large terminal phalange, no. 12554 (fig. 20), from the Thousand Creek Beds at locality 1100 at Thou- sand Creek, closely resembles the term-. inal phalanges of the bears, but may 12554, natural size. Thou- , . , r. sand Creek Beds, Thousand represent a very large canid rorm. Creek Nevada. MUSTELIDAE MUST EL A FURLONG I, n. sp. Type specimen, a lower jaw fragment with complete carnas- sial tooth, no. 12540, Univ. Calif. Col. Vert. Palae. From Thou- sand Creek Beds;
. Bulletin of the Department of Geology. Geology. Vol. 6] Mcrriam: Virgin Valley and Thousand Greek 249 URSIDAE( ?) URSUS(?), sp. A large terminal phalange, no. 12554 (fig. 20), from the Thousand Creek Beds at locality 1100 at Thou- sand Creek, closely resembles the term-. inal phalanges of the bears, but may 12554, natural size. Thou- , . , r. sand Creek Beds, Thousand represent a very large canid rorm. Creek Nevada. MUSTELIDAE MUST EL A FURLONG I, n. sp. Type specimen, a lower jaw fragment with complete carnas- sial tooth, no. 12540, Univ. Calif. Col. Vert. Palae. From Thou- sand Creek Beds; locality 1103, Thousand Creek, Humboldt County, Nevada. In the collections from near Thousand Creek there are two fragments of lower jaws with carnassials which represent an ex- ceedingly small musteline species. The mandible of the smaller specimen measures only about three and one-half millimeters in height below the carnassial. The jaws are also apparently rather slender, and the anterior end of the masseteric fossa does not extend as far forward as in most of the modern forms. (See figs. 22« and 22b). Mj possesses a well developed metaconid and a long basin-like heel. The metaconid is relatively a little larger than in the modern species of Mustela. The long, wide heel is bordered by a prominent horseshoe-shaped marginal wall. M2 is not present, but the tooth must have been much reduced, as the alveolus for the single root is small. P4, as shown in specimen 12540, is two- rooted. This species is somewhat more primitive than the Recent Mustela in the form of the trigonid of Mx, while the inner wall of the heel of this tooth is somewhat higher. More complete material may show that this form is generically distinct from the species grouped under the typical Mustela. In view of its. 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 rese
Size: 1751px × 1426px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, bookyear1902
