. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. Fig 121. Spirifer inacronotus. Cardinal view of a larpe individual; lateral views of two individuals, showing the character of the area (from Hall). widens towards the front, and the iinmber of plications, which varies from fifty to seventy on each valve, of which only three or four on each side of the fold and sinns reach the beak: the delthyrium is more than twice as high as wide, and the snrface of the shell exhibits lamellose, imbri- cating growth lines. Fonnd in the Encrinal limestone, at Section 5 (common);
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. Fig 121. Spirifer inacronotus. Cardinal view of a larpe individual; lateral views of two individuals, showing the character of the area (from Hall). widens towards the front, and the iinmber of plications, which varies from fifty to seventy on each valve, of which only three or four on each side of the fold and sinns reach the beak: the delthyrium is more than twice as high as wide, and the snrface of the shell exhibits lamellose, imbri- cating growth lines. Fonnd in the Encrinal limestone, at Section 5 (common); Stictopora and Demissa beds, at Section 5 (common); (me and one-half to three feet below the Encrinal limestone, at Section 6 (rare); shale below the Trilobite beds, in Avery's Ravine (rare). Spikifek ASPER. Hall. (Fig. 122.) (Geol. Snrv. of Iowa, 1858, Vol. I., Pt. II., p. r,()8, PL IV.) Distinguisliing Clmracters. — Small size; snb-pyramidal outline; high, flat cardinal area of pedicle valve; narrow and high delthyrinm; broad, comparatively shallow sinus,. 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 Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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