[135] This rifle regiment, under Colonel Talbot Chambers, was a contingent of the troops assigned to the Yellowstone expedition. See preface.—Ed.
[136] Fort Osage was surrounded by a tract six miles square. It was the only government trading factory west of the Mississippi. The post was occupied at intervals until 1827, when it was superseded by Fort Leavenworth and permanently abandoned. The site was near that of the present town of Sibley, Jackson County, which was named in honor of George C. Sibley (see volume v of our series, note 36), who was (1818-25) government agent at Fort Osage. The distance above Chariton River, by the government survey of the Missouri, is a hundred and twenty miles. See our volume v, note 31.—Ed.
[137] A sketch of Boone as a Missouri pioneer will be found in Bradbury's Travels, in our volume v, note 16.—Ed.
[138] From Fort Osage.
Productus spinosus, Say.—Longitudinally and transversely subequally striated, the transverse striæ somewhat larger than the others; a few remote short spines, or acute tubercles, on the surface, arising from the longitudinal striæ.
Breadth an inch and a half; the striæ are somewhat indistinct—as in No. 5.
Productus incurvus, Say.—Shell much compressed; hinge margin nearly rectilinear; surface of the valves longitudinally striated; convex valve longitudinally indented in the middle; the beak prominent and incurved at tip; opposite valve with a longitudinal prominence in the middle; the beak incurved into the hinge beneath the other beak, and distant from it.
Width more than 22⁄5 inches. A few univalves also occurred, but they were so extremely imperfect that their genera could not be made out.
A dark-coloured carbonate of lime, containing small Terebratulæ like the T. ovata of Sowerby, but less than half as long.
No. 1. a mass of carbonate of lime, containing segments of encrinites in small ossicula.