. Bulletins of American paleontology. 22 Bulletin 4 136 From Porter's creek Mr. Johnson obtained fragmentary speci- mens of what appear to be Ostrea cremilimarginata. He says on a slip of paper accompanying the specimens, '' Extending from Middleton, Tenn., several miles westward lies the Porter's creek formation of ; Hence we are led to believe that the greater part of Safford's Porter's creek group belongs to the Midway. The typical Crainesville-Middleton beds and fauna were found b}^ Johnson at a locality designated as McDonald's mill, 4 miles southwest of Middleton. The variou
. Bulletins of American paleontology. 22 Bulletin 4 136 From Porter's creek Mr. Johnson obtained fragmentary speci- mens of what appear to be Ostrea cremilimarginata. He says on a slip of paper accompanying the specimens, '' Extending from Middleton, Tenn., several miles westward lies the Porter's creek formation of ; Hence we are led to believe that the greater part of Safford's Porter's creek group belongs to the Midway. The typical Crainesville-Middleton beds and fauna were found b}^ Johnson at a locality designated as McDonald's mill, 4 miles southwest of Middleton. The various species he collected will be referred to in their proper places under Part II. Mississippi. Walnut mid vicinity.—In crossing the Mississippi line going south from Middleton one finds the peculiar calcareous gray, green specked, hardened clays of the Crainesville horizon outcrop- ping on the place described by Hilgard in his Agriculture and Geology of Mississippi, p. 112, as the Reeve place. This is about 2% miles northwest of Walnut. Mr. Hubbard made a. Fig. 2.— Chalybeia'TK Spring, Tippah Co., 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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